Barry Credit - www.spacefacts.de

Personal: Male, Married, Two children. Born in Norwalk, Connecticut, USA. MD, P

Astronaut Career

Astronaut Group: NASA Group 14 - 1992. Inactive Entered space service: 31 March 1992. Left space service: 2005. Number of Flights: 3.00. Total Time: 30.60 days. Number of EVAs: 4.00. Total EVA Time: 1.08 days.

Official NASA Biography - 1998

NAME: Daniel T. Barry (M.D., Ph.D.)

NASA Astronaut

PERSONAL DATA:

Born December 30, 1953, in Norwalk, Connecticut, but considers South Hadley, Massachusetts, to be his hometown. Enjoys flying, Go, basketball, running.

EDUCATION:

Graduated from Bolton High School, Alexandria, Louisiana, in 1971; received a bachelor of science degree in electrical engineering from Cornell University in 1975; a master of engineering degree and a master of arts degree in electrical engineering/computer science from Princeton University in 1977; a doctorate in electrical engineering/computer science from Princeton University in 1980; and a doctorate in medicine from the University of Miami in 1982.

ORGANIZATIONS:

Institute of Electrical and Electronic Engineers (IEEE); American Association of Electrodiagnostic Medicine (AAEM); American Academy of Physical Medicine and Rehabilitation (AAPMR); Sigma Xi; Association of Space Explorers.

SPECIAL HONORS:

1990 Silver Crutch Award as the outstanding teacher in Physical Medicine & Rehabilitation, University of Michigan. 1985-1990 Clinical Investigator Development Award, National Institutes of Health. 1984 Young Investigator Award, American Association of Electrodiagnostic Medicine. 1979 NSF National Needs Fellow. 1971 McMullen Engineering Award. 1992-1996 Trustee, Albert and Ellen Grass Foundation. 1996 MASA Space Flight Medal. 1996 Honorary Doctor of Science, St. Louis University.

EXPERIENCE:

Following graduate school at Princeton University, Dr. Barry was an National Science Foundation postdoctoral fellow in physics at Princeton. He then attended the University of Miami Medical School, graduating in 1982. He completed an internship and a Physical Medicine and Rehabilitation residency at the University of Michigan in 1985. He was appointed as an assistant professor in the Department of Physical Medicine and Rehabilitation and in the Bioengineering Program at the University of Michigan in 1985, and his tenure was approved by the Regents in 1992. He spent the summers of 1985-87 at the Marine Biological Laboratory in Woods Hole, Massachusetts, supported by the Grass Foundation for work in skeletal muscle physiology and as the Associate Director of the Grass Foundation Fellowship Program (1986-87). His research primarily involves biological signal processing, including signal processing theory, algorithms, and applications to specific biological systems. The applications include acoustic signals generated by contracting skeletal muscle, electrical signals from muscle and heart sounds. He has also worked in prosthetic design. Dr. Barry's work has been supported by the National Institutes of Health, the National Science Foundation, the Grass Foundation, and the American Heart Association of Michigan. He has five patents, over 30 articles in scientific journals, and has served on two scientific journal editorial boards.

NASA EXPERIENCE:

Selected by NASA in March 1992, Dr. Barry reported to the Johnson Space Center in August 1992. He completed one year of training and is qualified for assignment as a mission specialist on Space Shuttle flight crews. Dr. Barry has worked on primary payload development, the Shuttle Avionics Integration Laboratory (SAIL), portable computing issues for Space Shuttle, Chief of Astronaut Appearances, and as a source board member for the NASA Space Biomedical Research Institute (NSBRI). Most recently, Dr. Barry served aboard Endeavour on STS-72 (January 11-20, 1996). During the 9-day flight the crew retrieved the Space Flyer Unit (launched from Japan 10-months earlier), deployed and retrieved the OAST-Flyer, and Dr. Barry performed a space walk designed to demonstrate and evaluate techniques to be used in the assembly of the International Space Station. In completing his first space flight, Dr. Barry orbited the Earth 142 times, traveled 3.7 million miles, and logged a total of 214 hours and 41 seconds in space, including a 6 hour, 9 minute space walk.

• 11 January 1996 Flight: STS-72. Flight Up: STS-72. Flight Back: STS-72. Flight Time: 8.92 days.

• 27 May 1999 Flight: STS-96. Flight Up: STS-96. Flight Back: STS-96. Flight Time: 9.80 days.

• 10 August 2001 Flight: STS-105. Flight Up: STS-105. Flight Back: STS-105. Flight Time: 11.88 days.

5 December 1992 - NASA Astronaut Training Group 14 selected.. The group was selected to provide pilot, engineer, and scientist astronauts for space shuttle flights.. Qualifications: Pilots: Bachelor's degree in engineering, biological science, physical science or mathematics. Advanced degree desirable. At least 1,000 flight-hours of pilot-in-command time. Flight test experience desirable. Excellent health. Vision minimum 20/50 uncorrected, correctable to 20/20 vision; maximum sitting blood pressure 140/90. Height between 163 and 193 cm.

Mission Specialists: Bachelor's degree in engineering, biological science, physical science or mathematics and minimum three years of related experience or an advanced degree. Vision minimum 20/150 uncorrected, correctable to 20/20. Maximum sitting blood pressure of 140/90. Height between 150 and 193 cm.. Four pilots and 15 mission specialists, nine civilians and ten military. Chosen from 2054 applicants, 87 of which screened in December 1991/January 1992. Five additional international astronauts.

After spending the day unstowing final items and installing air ducts for the Russian-built Zarya control module and the U.S.-built Unity module, Commander Bob Cabana and Russian Cosmonaut Sergei Krikalev closed the hatch to Zarya at 4:41 p.m. Central time. They closed a series of additional hatches as the crew made its way back to Endeavour, finally swinging the door to Unity shut at 6:26 p.m. This ended the first excursion by astronauts into the international outpost, an excursion that lasted 28 hours and 32 minutes.

Left behind were tools, supplies and clothing for the crew that will visit the station during the next shuttle assembly flight in May, and for the first crew members who will establish a permanent occupancy of the station in January 2000.

Back inside Endeavour, the astronauts completed preparations for a third and final space walk Saturday by Jerry Ross and Jim Newman to tidy up cable configurations. Ross and Newman plan to disconnect several jumper cables used to route power from Zarya to Unity before permanent electrical connections were made and disconnect cables used to permanently lock the two modules' docking mechanisms together. In addition, tool bags will be stowed on the side of Unity's uppermost Pressurized Mating Adapter for use by space walkers Tammy Jernigan and Dan Barry on the STS-96 assembly mission in May.

Near the end of Saturday's space walk, Ross plans to use a grappling hook to try to free the second of two jammed antennas that are part of Zarya's backup rendezvous system. Just as Newman did on Wednesday, Ross will use the device to pry the balky antenna free to its fully extended position while attached to the end of Endeavour's robot arm.

The space walk is scheduled to begin about 3:06 p.m. Central time Saturday, but could get under way earlier if Ross and Newman are ahead of schedule in their space walk preparations.

With all of their work complete, Endeavour's crew members will undock from the newly outfitted station at 2:25 p.m .Sunday, leaving the 35-ton complex to fly on its own for the next five months. Through an S-band communications system installed in Unity by the astronauts, station flight controllers will be able to monitor the health of Unity and Zarya as the complex orbits the Earth.

The astronauts will begin an eight-hour sleep period at 2:36 a.m. Central time Saturday and will be awakened at 10:36 a.m. to begin space walk preparations.

Endeavour and the International Space Station are orbiting the Earth at and altitude of 246 statute miles with all of their systems in excellent shape.

This afternoon's spacewalk, set to begin about 3:06 p.m. CST, could get under way earlier if Mission Specialists Jerry Ross and Jim Newman are ahead of schedule in their space walk preparations. Today's activities will be devoted mostly to tasks that ready the station for future assembly work.

The crew's first job will be to release some cable ties on four cables connected on an earlier space walk, three located on Unity's upper mating adapter and one on its lower adapter, to relieve tension on the lines. Flight controllers noted the cable tension from camera views of the station, and they are concerned that leaving the cables as they are would not allow enough play in them to accommodate cyclical heating and cooling that occurs between orbital night and day. The space walkers also will check an insulation cover on one cable connection on the lower Pressurized Mating Adapter (PMA 2) to make sure it is fully installed.

Ross and Newman then will attach a bag of tools - wrenches, power grip tools, ratchets and foot restraints - on the side of Unity's upper mating adapter (PMA 1). Astronauts Tammy Jernigan and Dan Barry will use these tools during their space walk next May during the STS-96 assembly mission. Ross and Newman also will inspect bubbling paint that has been noted on some of the Orbiter Space Vision System targets on Unity.

Next, the space walkers will disconnect cables that the crew used to operate the docking mechanism on Unity's upper mating adapter when Zarya was docked earlier in the mission. Also, Ross will use a 10-foot-long grappling hook to try to free the second of two jammed antennas that are part of Zarya's backup rendezvous navigation system. The first antenna was successfully deployed on a space walk Wednesday by Newman using the same method. After the antenna deploy, Ross will stow the grappling hook on the outside of Zarya, and he and Newman will install a handrail at the far end of the module.

Near the end of the space walk, after packing up their tools , the astronauts will do a detailed photographic survey of the space station from top to bottom. Finally, each astronaut will test fire the Simplified Aid for Extravehicular Activity Rescue (SAFER) jet backpacks they are wearing, a type of space "lifejacket," that would allow an astronaut to fly back to the station if they should ever become untethered. During an earlier flight test on STS-86, a valve failed and prevented the propulsion jets on the backpack from firing. The valve was redesigned and extensively tested on the ground and today's in-flight test will assist in verifying the new design.

With the first steps in the orbital construction of the International Space Station completed, Endeavour is planned to undock from the new outpost at 2:25 p.m. CST on Sunday, leaving the 7-story, 35-ton complex to fly on its own for the next five months. Station flight controllers will be able to monitor the health of the station through an S-band communications system installed in Unity by the astronauts.

Endeavour and the International Space Station are orbiting the Earth at an altitude of 246 statute miles with all systems operating normally.

This determination follows completion of power tests last Friday. In and around ongoing system monitoring, engineers and managers have overseen the first of three tests scheduled to be completed prior to Discovery's launch to the station on the STS-96 mission late next month. This first test demonstrated that higher power usage in the current configuration provides adequate battery margins in the Zarya module while warming Unity's shell temperatures, which is necessary before the shuttle docks to the station and the crew climbs inside. Test one involved gradually increasing the power used aboard Unity by turning on several heaters to gather insight to plan the best method for warming the module prior to Discovery's docking with the station. The tests are being conducted during a period of time when the station's orbital environment is similar to that in which it will be next month when Discovery arrives. Analysis of this first test indicates that Zarya can deliver at least 900 watts of continuous power to Unity in the present attitude - or position in space - which simplifies the operations planning underway for the shuttle flight. The next test aboard the ISS will begin April 14 and will involve repositioning the station for further power tests. The test's primary objective is to demonstrate the ability of Zarya to deliver 1,500 watts of power to Unity in the attitude required for Shuttle docking. A third test, scheduled just prior to the start of Discovery's mission, will test a software update to Zarya's computer to permit use of only the module's small thruster jets for control. Meanwhile, flight controllers continued to analyze a persistent low signal strength reading on the right-side Omni antenna on Unity. The antenna, one of two used by the U.S. early communications system, has shown degradation in its ability to receive signals from the ground when the station was in certain orientations. Flight planners for the STS-96 mission are budgeting time in the mission to survey the antenna with the shuttle's robotic arm prior to the spacewalk by Tammy Jernigan and Dan Barry. No repair hardware is planned to be taken aboard Discovery since the slightly reduced communications capability has had minimal impact on operations. The U.S. communications system, installed on Shuttle mission STS-88 last year, is one of two complementary communications systems on the station, including a Russian communications system onboard Zarya. The International Space Station is in an orbit with a high point of 251 statute miles and a low point of 240 statute miles, circling the Earth once approximately every 92 minutes. The station has completed 2,150 orbits of Earth since its launch.

The STS-96 payload bay manifest:

• Bay 1-2: Orbiter Docking System/External Airlock
• Bay 3-4: Tunnel Adapter S/N 001
• Bay 5-7: Spacehab Tunnel
• Bay 5: Keel Yoke Device (KYD) and Integrated Cargo Carrier (ICC)
• Bay 8-12: Spacehab Logistics Double Module
• Bay 13 Port: Adapter Beam (ABA) with IVHM
• Bay 13 Stbd: Adapter Beam (ABA) with SVF/Starshine
• Sill: RMS Arm S/N 303

On May 30 at 02:56 GMT Tammy Jernigan and Dan Barry entered the payload bay of Discovery from the tunnel adapter hatch, and made a 7 hr 55 min space walk, transferring equipment to the exterior of the station.

On May 31 at 01:15 GMT the hatch to Unity was opened and the crew began several days of cargo transfers to the station. Battery units and communications equipment were replaced and sound insulation was added to Zarya. Discovery undocked from ISS at 22:39 GMT on June 3 into a 385 x 399 km x 51.6 degree orbit, leaving the station without a crew aboard. On June 5 the Starshine satellite was ejected from the payload bay. The payload bay doors were closed at around 02:15 GMT on June 6 and the deorbit burn was at 04:54 GMT. Discovery landed on runway 15 at Kennedy Space Center at 06:02 GMT.

Commander Kent Rominger, Pilot Rick Husband and Mission Specialists Tammy Jernigan, Ellen Ochoa, Dan Barry, Julie Payette and Valery Tokarev lifted off at 5:50 a.m. Central time following a flawless countdown. Less than nine minutes later, they reached orbit to begin their pursuit of the station.

At the time of launch, the ISS's two modules, Zarya and Unity, were traveling due east of the outer banks of the Carolinas northwest of Bermuda at an altitude of about 210 nautical miles. Discovery will catch up to the ISS late tomorrow night for the first docking of a Shuttle to the new orbital outpost. That will mark the start of six days of docked activities in which the astronauts plan to transfer almost two tons of supplies to the station and conduct a spacewalk to continue outfitting the fledgling facility.

Once on orbit, the astronauts began to activate shuttle systems and conducted early work in advance of their rendezvous with the ISS, which will begin early Friday evening. Having launched late in their workday, the astronauts are scheduled to begin an eight hour sleep period at 10:50 a.m. Central time. They will be awakened this evening about 6:50 p.m. Central time for the start of their second day in space - a day which will be highlighted by ongoing preparations for both the docking of Discovery to the station Friday night and the scheduled spacewalk by Jernigan and Barry late Saturday night.

Discovery is orbiting at altitude of about 170 nautical miles, with all of its systems functioning in good shape.

Commander Kent Rominger, Pilot Rick Husband and Mission Specialists Ellen Ochoa, Dan Barry, Julie Payette, Valery Tokarev and Jernigan will spend much of the day checking out orbiter systems and spacewalking equipment, while continuing to slowly close in on the station through a series of calculated rendezvous maneuvers.

The crew will examine and prepare the tools required to support rendezvous and docking operations, and later will spend a number of hours checking and testing the extravehicular mobility units, or space suits, that will be used during the planned spacewalk Saturday night into Sunday morning. Both suits are checked far enough ahead of the spacewalk to ensure good working condition in plenty of time to allow for any required troubleshooting work by the specialists on the ground.

Also tonight and into tomorrow, Canadian astronaut Payette will assist Ochoa in testing the mechanical arm, checking its operation while conducting a video survey of the payload bay. This procedure will make certain the arm is functioning properly to support the spacewalk. Just before the pre-sleep period, Tokarev, a Russian cosmonaut will move some logistics transfer items stored on the shuttle's middeck, into the Spacehab module to provide more room for the spacesuit checkout activities.

Discovery currently is orbiting at an altitude of about 200 nautical miles. At about 7 o'clock this evening, Central time, the shuttle was 775 nautical miles behind the station, closing in at a rate of about 60 nautical miles every 90 minutes.

The only problem of any significance on the orbiter is the apparent failure of one of the four corner cameras in Discovery's payload bay. This poses no problem with the flight as there are various other cameras available to document activities related to docking, the spacewalk and deploy later in the flight of STARSHINE.

In preparation for Saturday's spacewalk, astronauts Tammy Jernigan and Dan Barry, assisted by Payette and Pilot Rick Husband, successfully tested three spacesuits aboard Discovery. All of the equipment was found to be in excellent condition and ready for the spacewalk, during which Jernigan and Barry will install both U.S. and Russian-built cranes to the station for use by future astronaut construction crews.

Ochoa and Payette also tested the Shuttle's 50-foot robot arm and used it to conduct a television survey of Discovery's payload bay. Jernigan and Ochoa extended the outer ring of Discovery's Orbiter Docking System in a successful test of the mechanism which will make the first contact with and capture a similar mechanism in the Pressurized Mating Adapter affixed to the ISS's Unity.

Before beginning their presleep period, the astronauts lowered Discovery's cabin pressure as a precursor to Jernigan and Barry breathing pure oxygen tomorrow night in advance of their spacewalk. This protocol helps to purge nitrogen from their bloodstreams, preventing any adverse effects from the vacuum of space during their excursion into Discovery's payload bay.

The crew will begin an abbreviated 7 ½ hour sleep period at 8:50 a.m. Central time today and will be awakened at 4:20 p.m. to begin preparations for rendezvous and docking.

Discovery is orbiting at an altitude of 230 statute miles, with all of its systems operating normally.

Rominger will then begin to descend toward the station and, at about 10:37 p.m. Central, hold position at a point about 170 feet away. Rominger will stationkeep at that distance for about 15 minutes to allow the station to move within range of Russian ground communications stations before continuing the approach. At 11:13 p.m., Rominger will again briefly hold position at a point about 30 feet from the station to ensure the Shuttle and station docking mechanisms are precisely aligned. Docking is expected about 11 minutes later with the Shuttle contacting the station at a slow rate of about a tenth of a foot per second.

During the rendezvous, Pilot Rick Husband will assist Rominger in controlling Discovery's approach. Mission Specialists Tammy Jernigan and Ellen Ochoa also will assist with the rendezvous and docking, with Jernigan operating the Shuttle's docking mechanism and Ochoa assisting with the rendezvous navigation.

After docking, Ochoa and Jernigan will perform a hatch leak check. Later, Mission Specialists Dan Barry, Jernigan and Canadian astronaut Julie Payette will prepare the middeck for Saturday's spacewalk. Discovery's crew will not open the hatch to the Unity module and enter the station until Sunday, a day after the spacewalk is completed.

Space station flight controllers planned to command the station into the orientation for docking - Unity toward space and the Zarya module toward Earth - at about 7 p.m. Central to prepare for Discovery's arrival.

Commander Kent Rominger nudged Discovery to the docking with the ISS following a flawless rendezvous. Once a hard mate was established between the two vehicles, the astronauts began to perform leak checks and pressurization checks prior to opening the hatch to the Pressurized Mating Adapter attached to the Unity module. Discovery docked to Unity's Pressurized Mating Adapter # 2, which was pointed to deep space during the final phase of the rendezvous and approach to the station by the shuttle.

The astronauts will begin an eight-hour sleep period at 8:50am Central time this morning and will be awakened just before 5pm this afternoon to begin preparations for the spacewalk by Tammy Jernigan and Dan Barry late tonight to install additional equipment to the outside of the ISS.

During the planned six and a half hour space walk, Jernigan and Barry are scheduled to install some 700 pounds of tools and equipment on the International Space Station's exterior for use on future assembly flights.

The space walk will include the transfer of two cranes from the shuttle's payload bay to locations on the outside of the station. The cranes will help subsequent space station crews move large modular components from one module to another. With Mission Specialist Ellen Ochoa operating the shuttle's robot arm to maneuver Jernigan up toward the space station, Canadian astronaut Julie Payette will choreograph the activities from the Discovery's flight deck.

The astronauts will move the first crane, the American built Orbital Transfer Device from the cargo pallet to one of the pressurized mating adapters located on either side of the Unity module. Jernigan and Barry then will move components of a second crane, the Russian-built Strela - Arrow in English - to the other PMA closest to the shuttle.

Their last scheduled task is to open a storage box on the cargo carrier and move three equipment and tool bags to locations on the outside of the ISS. Time permitting, they will install a thermal cover on Unity's payload bay attach pin, inspect some painted surfaces on Zarya's exterior and examine a communications antenna on Unity's starboard side.

The space walkers are scheduled to climb back aboard Discovery at about 4 a.m. Central time Sunday. Meanwhile, all systems aboard the Discovery and ISS space complex continue to work well as the two craft orbit 240 statute miles above the Earth's surface.

Commander Kent Rominger completed a textbook rendezvous and docking with the station that Mission Control said would set the standard for future ISS assembly flights. Contact between Discovery and the station occurred right on time at 11:24 p.m. Central time Friday.

Once the two spacecraft were solidly mated together at 11:39 p.m., the astronauts performed leak and pressurization checks, then opened the hatch to Pressurized Mating Adapter 2, attached to the Unity module. Mission Specialists Ellen Ochoa and Valery Tokarev temporarily stowed docking targets and lights and checked hatch seals in the narrow passageway.

Rominger and Pilot Rick Husband removed and stowed four electronics boxes used to supply power to the docking ports around the Unity module, clearing the sides of the passageway into Unity for easy transfer of some 3,600 pounds of equipment and supplies. The briefcase-sized boxes will be kept in storage until the end of the next station assembly flight on STS-101 in December, when they will be reinstalled to prepare for the arrival of the U.S. Laboratory module, Destiny, next spring.

Mission Specialists Tammy Jernigan and Dan Barry spent the rest of the morning checking the tools they will use on their space walk, which is scheduled to begin shortly after 10 p.m. Central time. They also checked out their emergency rescue backpacks and reviewed their space walk procedures one last time.

The astronauts will be awakened at 4:50 p.m. today to begin final preparations for the 6 ½ hour excursion into Discovery's cargo bay. With Mission Specialist Ellen Ochoa operating the shuttle's robot arm to maneuver Jernigan up toward the space station modules, and Julie Payette acting as the spacewalk choreographer from Discovery's aft flight deck, Barry and Jernigan will move the two cranes from a payload bay cargo support structure to locations on the outside of the station. One crane is U.S.-built and the other is Russian-built to help move large modular components from one module to another during ISS assembly. Next, they will move two portable foot restraints from the cargo carrier to the mating adapter to which the Zarya and Unity modules are attached. Then, they'll move three bags containing handrails and tools for future space walkers to the outside of Unity. If time permits, the space walkers also will install a thermal cover on a Unity trunnion pin, inspect some peeling paint on Zarya, and survey one of two Early Communications System antennas on the starboard side of Unity.

The space walkers are scheduled to reenter the hatch about 4 a.m. Central time Sunday.

Meanwhile, all systems aboard the Discovery / ISS space complex continue to work well as the two craft orbit 240 statute miles above the Earth's surface.

The crew is scheduled to climb inside the Unity and Zarya modules mid evening to begin transferring nearly 3,000 pounds of equipment to be used by future crews on the ISS. In and around transferring operations, some maintenance tasks will be conducted - one inside Zarya and one inside Unity.

After wakeup to the notes of the US Coast Guard Band playing "Morning Colors," the crew reviewed procedures for the entry activities with both Mission Control Centers in Houston and Moscow.

Canadian astronaut Julie Payette and Russian cosmonaut Valery Tokarev will travel to the Zarya module and begin maintenance activities on the storage batteries located under the floor board. The Zarya has six such batteries, which have been experiencing a slight loss in charging capacity during recharge. Each battery has three "charge controllers" for a total of 18 that will be changed during this procedure. Later, Mission Specialist Dan Barry and Tokarev will install some acoustic insulation around some fans inside Zarya to reduce noise levels in the module.

Meanwhile, in the Unity module, Mission Specialist Tammy Jernigan and Pilot Rick Husband will install shelving in 2 soft stowage racks. The racks themselves were launched with Unity in December 1998 for use in supporting logistics transfer activities. Later, Husband and Barry will conduct troubleshooting and maintenance activities on the Early Communications System.

In the afternoon, the third major task of the flight begins - transfer of logistics items. Ochoa will coordinate this activity and will direct and document all transfers leaving the shuttle. On the ISS side, Payette will receive the items and, along with Tokarev, will document and stow items aboard the ISS. Discovery's astronauts are scheduled to transfer almost 2,900 pounds of supplies and equipment during the next three days.

Today's space walk - the 45th in space shuttle history and the fourth of the International Space Station era - began at 9:56 p.m. Central time Saturday night, and concluded at 5:51 a.m. Sunday, lasting 7 hours, 55 minutes. The longest spacewalk was conducted by STS-49 Astronauts Rick Heib, Pierre Thuot and Tom Akers, which lasted 8 hours, 29 minutes on May 13 and 14, 1992.

During today's spacewalk, Jernigan and Barry transferred and installed two cranes from the shuttle's payload bay to locations on the outside of the station. They also installed two new portable foot restraints that will fit both American and Russian space boots, and attached three bags filled with tools and handrails that will be used during future assembly operations. Once those primary tasks were accomplished, Jernigan and Barry installed an insulating cover on a trunnion pin on the Unity module, documented painted surfaces on both the Unity and Zarya modules, and inspected one of two early communications system antennas on the Unity.

Throughout the space walk, Jernigan and Barry were assisted by their crew mates as Mission Specialist Ellen Ochoa operated the Shuttle's robot arm to maneuver Jernigan around Discovery's cargo bay, and Canadian Space Agency astronaut Julie Payette acted as "choreographer" of the spacewalk from Discovery's flight deck.

The excursion raised the total number of International Space Station era space walks to four, with the total time spent on construction activities now standing at 29 hours, 17 minutes. STS-88 Astronauts Jerry Ross and Jim Newman spent 21 hours, 22 minutes outside Endeavour during their three space walks.

The crew is scheduled to begin its sleep shift at 8:50 a.m. today and will receive a wake-up call from Mission Control at 4:50 p.m. The crew is scheduled to open a series of hatches connecting Discovery with the International Space Station and enter the new facility about 7:35 p.m. Central time to begin the transfer of equipment and logistical supplies from the Shuttle to the station. They'll also conduct repairs on battery charging systems in Zarya and a balky communications system in Unity.

Mission Specialists Tammy Jernigan and Russian Space Agency cosmonaut Valery Tokarev opened the hatch into the Unity module at 8:14 p.m. CDT Sunday, then continued through Pressurized Mating Adapter 1 into the Zarya module at 9:07 p.m. Commander Kent Rominger and the rest of the crew - Pilot Rick Husband and Mission Specialists Ellen Ochoa, Dan Barry and Canadian Space Agency astronaut Julie Payette - soon followed.

After inspecting their expanded living quarters, the crew began transferring supplies, equipment and water that will be left aboard, an effort that was coordinated by Ochoa. The bulk of the supplies and equipment were shipped up in a double Spacehab module carried in Discovery's cargo bay.

Payette and Tokarev replaced 12 of 18 battery recharge controllers in the Russian-built Zarya module. Zarya has six batteries, which have been experiencing a slight loss in capacity during recharge. Each battery has three "charge controllers," known by the Russian acronym MIRTS. The astronauts replaced controllers for four of the batteries, and are scheduled to replace the recharge controllers for the other two later today. The work was carefully coordinated with flight controllers in the Russian Mission Control Center outside Moscow, who issued commands to turn the battery systems on and off via ground-based communication stations. Barry and Tokarev also installed a series of "mufflers" over fans inside Zarya to reduce noise levels in that module.

Barry and Husband replaced a power distribution unit and transceiver for the Early Communications System in the Unity module, restoring that system to its full capability. This supplemental communications system enables flight controllers to send commands to the station from the Mission Control complex in Houston.

Near the end of their workday, Rominger, Jernigan and Barry discussed the progress of their mission, including Jernigan and Barry's space walk and last night's entry into the International Space Station, with NBC's "Today," show, CBS "This Morning" and CNN.

The crew is scheduled to begin its sleep period at 8:20 a.m. CDT, and will awaken at 4:20 p.m. to continue their work in the ISS.

Today, most of the crew will be involved in logistics transfer activities within the Discovery/ISS orbiting complex. Husband and Mission Specialists Ellen Ochoa, Tammy Jernigan and Dan Barry have a significant portion of their day dedicated to moving transfer bags of different sizes and shapes from the Spacehab module in Discovery's cargo bay to resting places inside the International Space Station. Some 2,900 pounds of logistics items and water will be transferred before the crew bids goodbye to its orbiting work site on Thursday.

Discovery's crew will also complete maintenance activities in support of the station. Early in the workday, Russian cosmonaut Valery Tokarev and Canadian astronaut Julie Payette will change out the last battery recharge controller modules attached to two of Zarya's storage batteries. These recharging units, also known as microelectronic charge/discharge current integrator units, determine the battery charge level. Since mid-April, flight controllers had been monitoring a slight decrease in this level, and the on-orbit maintenance work is expected to allow the batteries to charge fully once again.

Later, Barry and Tokarev will put the remaining sound mufflers inside the Zarya module. Ambient noise from air circulating fans and equipment could be somewhat distracting to crew members spending time on orbit, so mufflers are being installed to dampen the noise. After the install, Barry will measure sound levels at different positions inside the module.

At 12:20 a.m. Tuesday, Commander Kent Rominger and Tokarev will conduct a news conference with Russian media located at the Mission Control Center in Moscow.

The day will end with a logistics transfer briefing conducted by Payette. The crew is scheduled to turn in at about 8 a.m. CDT Tuesday.

Discovery and the International Space Station are in excellent health orbiting 240 miles above the Earth.

Mission Specialist Ellen Ochoa, the "load master" of this resupply mission, radioed to Mission Control that many of the larger items to be transferred to the new station, such as laptop computers and clothing, had made their way from Discovery to the ISS. At the time the astronauts prepared to go to sleep, well over 50 per cent of all planned transfers were complete.

Early in the crew's workday, Russian cosmonaut Valery Tokarev and Canadian astronaut Julie Payette changed out the final six battery recharge controller units for two of Zarya's power-producing batteries. The new recharging units are expected to allow the batteries to charge and discharge properly once again. They had experienced difficulty soon after Zarya's launch last November. Twelve of the units were replaced late Sunday.

Dan Barry and Tokarev continued the installation of mufflers inside Zarya to help dampen sound levels in the Russian module. Commander Kent Rominger sent down a video inspection of the mufflers installed on portions of the air circulating duct work, explaining that the mufflers are causing some of the flexible ductwork to collapse. Flight controllers believe that humidity levels inside Zarya are at an acceptable level even though they are a bit higher than predicted because of some restriction to air flow in the module. Additional muffler and humidity reduction work likely will be conducted by the astronauts late tonight.

Rominger and Tokarev took time out to answer questions regarding the progress of the flight from Russian reporters located at the Russian Mission Control Center outside Moscow.

The astronauts will begin an eight-hour sleep period at 7:50 a.m. Central time, with a wake-up call scheduled for 3:50 p.m. to begin their seventh day of work in space.

Discovery and the International Space Station are in excellent health orbiting 240 miles above the Earth.

Mission Specialist Ellen Ochoa, who has been coordinating the transfer activities, reported early this morning that the transfer of clothing, water, sleeping bags, spare parts, medical equipment, supplies and hardware for the so-called Expedition One crew is essentially complete. Mission Specialist Julie Payette coordinated stowage of the items in the Unity and Zarya modules. Earlier in the flight, space walkers Dan Barry and Tammy Jernigan installed another 700 pounds of equipment on the exterior of the station to be used during future assembly missions. A handful of items will be carried from Discovery to the station late tonight to wrap up the primary objective of the flight.

One of the few items still to be transferred is a seventh bag of water. A total of almost 75 gallons of water will be left aboard the station for the first resident crew, which is comprised of Expedition Commander Bill Shepherd and Russian cosmonauts Yuri Gidzenko and Sergei Kirkalev.

With the transfer work all but complete, the astronauts conducted some additional work, installing parts of a wireless strain gauge system that will help engineers track the effects of adding modules to the station throughout its assembly, cleaning filters and checking smoke detectors.

The crew took time from their activities overnight to conduct a variety of news conferences with media representatives, and Payette accepted a congratulatory call from Canadian Prime Minister Jean Chretien and schoolchildren in Ottawa.

The astronauts began an eight-hour sleep period at 7:50 a.m. Central time and will be awakened at 3:50 p.m. to begin their final day of work aboard the international station.

The primary activity for the astronauts will be to move the few remaining items from Discovery to the ISS, then close a series of hatches within the station's modules leading back to the shuttle. Shortly after 4:30 a.m. Thursday, Discovery's thrusters will be commanded to fire in a series of 17 bursts to raise the Space Station's altitude by about five to six miles. That reboost maneuver will enable the station to be in the correct altitude for the arrival of the Russian Zvezda service module late this year. It will be the next component to be linked to the growing station complex and the first living quarters for the first permanent occupants of the orbital facility.

Discovery and the International Space Station are in excellent health orbiting 240 miles above the Earth.

After moving the last items from Discovery into the station, the crew closed the final hatch on the orbiting outpost at 3:44 a.m. CDT. The astronauts spent a total of 79 hours, 30 minutes inside the station during this flight. Combined with the 28 hours, 30 minutes the STS-88 astronauts spent on board during the first ISS assembly flight last December, the total human occupation time for the new station stands at 108 hours.

During four days of transfer work, the astronauts moved more than 4,500 pounds of equipment, hardware and supplies intended for the station's first resident crew. Of that total weight, 3,567 pounds of material, including 686 pounds of water, were transferred from Discovery to the station; 18 items weighing 197 pounds were moved from the station to Discovery for a return to Earth; and 662 pounds of supplies were mounted to the station during a spacewalk by astronauts Tammy Jernigan and Dan Barry.

The crew began its carefully choreographed departure from the station, first closing Zarya's Instrumentation Cargo Compartment hatch at 1:40 a.m. Central time. The Pressurized Adapter Hatch was closed at 2:12 a.m., and the final hatch closure on Unity was complete at 3:44 a.m. Shortly after 4:30 this morning, Commander Kent Rominger and Pilot Rick Husband commanded a series of 17 pulses of Discovery's reaction control system jets to boost the station's orbit. When the reboost was complete about 37 minutes later, the station and shuttle were in an orbit of approximately 246 by 241 statute miles, within 57 feet of the original target. Flight controllers estimate the station will be at an altitude of 222 statute miles late this year when Zvezda is scheduled to be launched from the Baikonur Cosmodrome in Kazakhstan.

Discovery is scheduled to undock from the station at 5:39 p.m. Central time today and will perform a 2 ½ lap flyaround of the station, before Husband fires Discovery's jets in a final burst to move Discovery away from the station, concluding six days of docked operations.

The astronauts begin an eight-hour sleep period at 7:50 a.m. today, and will awaken at 2:50 p.m.

Discovery undocked from ISS at 5:39 p.m. central time yesterday, having delivered more than two tons of water, supplies and equipment to the space station.

As Discovery departed from the station, Mission Specialists Tammy Jernigan and Dan Barry packed away the space suit gear they used during their spacewalk early in the mission, while Commander Kent Rominger and Pilot Rick Husband practiced landings on a laptop computer program. Mission Specialists Julie Payette and Valery Tokarev helped to stow gear and repressurized the shuttle's cabin to its standard 14.7 pounds per square inch.

Once they are awakened at 3:50 this afternoon, the astronauts will focus on preparing for a Sunday landing at the Kennedy Space Center. Rominger, Husband and Mission Specialist Ellen Ochoa will conduct a test to verify the performance of Discovery's steering jets. They also will activate one of three hydraulic power units to move the various aerosurfaces that will be used to control Discovery during its reentry and landing. The crew also will prepare to deploy a small, student-built payload called STARSHINE. The Student Tracked Atmospheric Research Satellite for Heuristic International Networking Equipment satellite will be ejected from a canister in Discovery's payload bay at 2:10 a.m. Saturday by Payette. STARSHINE is a 19-inch hollow sphere covered by about 800 aluminum mirrors polished to a high shine by students around the world. International student observers will visually track the reflective spacecraft during the early morning and twilight hours for several months, measuring the atmosphere's density based on the rate at which STARSHINE's orbit decays.

Discovery has two Sunday landing opportunities on Kennedy Space Center's Runway 15. The first would begin with a deorbit burn at 11:54 p.m. CDT Saturday, and end with a landing at 1:03 a.m. Sunday. The second calls for a deorbit burn at 1:30 a.m. CDT Sunday, with landing at 2:38 a.m. The weather forecast calls for generally acceptable conditions.

Weather permitting, Discovery's computers will ignite the twin breaking rockets on the tail just before midnight to slow the vehicle toward a descent through the atmosphere high above the Pacific Ocean. The ground track shows the orbiter navigating its way to its seaside home at the Kennedy Space Center from the south after crossing Costa Rica, Cuba, the Florida Everglades, and East of Lake Okechobee.

The forecast for landing still shows a chance of rain within 30 miles of the runway and a possibility of crosswind violations on the 3-mile-long concrete Shuttle Landing Facility. The runway of choice for tonight's landing is Runway 15. The final turn to align the shuttle with the runway would be out over the water with landing from the northwest to the southeast. If landing is delayed one orbit, touchdown one orbit later at 2:38 a.m. CDT.

Following crew wakeup at 4 p.m. today, the astronauts began the final preparations for landing, including closing the hatches to the Spacehab module, which has served as the cargo transfer compartment throughout the flight. The wakeup music was "The Longest Day," to commemorate what spacecraft communicator in Mission Control Mario Runco called a "landing of a different kind." His reference was to the 55th anniversary of the Allied troop landing on the beaches of Normandy during World War II that occurred on June 6, 1944.

If all goes as planned, Discovery's cargo bay doors will swing shut at 9:18 p.m., after which the astronauts will climb into their launch and entry suits and strap into their seats. Commander Kent Rominger, Pilot Rick Husband and Flight Engineer Ellen Ochoa will be joined on the flight deck for entry by Mission Specialist Julie Payette. Tammy Jernigan, Dan Barry and Valery Tokarev will be seated down on the middeck for entry.

If landing occurs on the first opportunity, Discovery will have covered 3.8 million miles during the mission. STS-96 will be the 11th shuttle mission to end in darkness. Five previous flights have ended at Edwards AFB in California and five at KSC.

Discovery swooped out of darkness as Commander Kent Rominger set the shuttle and his crewmates down on Runway 15 at the Shuttle Landing Facility in Florida to successfully complete the first shuttle mission of the year.

Rominger and Pilot Rick Husband fired Discovery's orbital maneuvering system engines just before midnight Saturday over Thailand to enable the spaceship to drop out of orbit for its high speed return to Earth.

Traveling in an almost due northerly ground track, Discovery crossed over Costa Rica, the southern Caribbean, northwest Cuba, and the Florida Everglades before honing in on the Kennedy Space Center for the 18th consecutive landing at the Florida spaceport.

Rominger and Husband were joined on the flight deck for entry and landing by Flight Engineer Ellen Ochoa and Mission Specialist Julie Payette, while Mission Specialists Tammy Jernigan, Dan Barry and Valery Tokarev were seated down in the middeck.

After landing, Discovery's astronauts were scheduled to undergo routine medical exams and be reunited with their families before spending the rest of the day relaxing in Florida.

The crew is expected to return to Houston early Monday afternoon, with their crew arrival at Ellington Field planned for about 1:30 p.m. The STS-96 crew's return to Ellington is open to the public.

The first major task will be the closing of Columbia's cargo bay doors at about 6:40 this evening, followed by the astronauts climbing into their launch and entry suits shortly before 8 p.m. The entry flight control team led by Flight Director John Shannon will receive updated weather forecasts throughout the late afternoon and evening before a "go-no go" decision for the deorbit burn is issued around 9 p.m.

There are two opportunities to land Tuesday night. The first begins with a deorbit burn on orbit 79 at 9:19 p.m. with a landing at 10:20 p.m. at Kennedy Space Center Florida. Columbia's orbital maneuvering engines will fire, slowing the 100-ton spacecraft by 250 feet per second, enough to drop it into the atmosphere halfway around the world. Columbia's unpowered glide through the atmosphere will heat a plasma layer around the heat-protecting tiles and creating a brilliant streak across the night sky for many ground observers. The Orbiter will cross Baja California and northwest Mexico, bisect Texas from west to east and pass over southern Louisiana on its way to Florida. Weather permitting, ground observers will be able to see the entry path about 100 miles on each side of the track. Columbia will cross Texas between 10 and 10:05 p.m. and a few minutes later will overfly Louisiana. Present plans call for a right turn to line up with runway 33, a southeast to northwest landing.

The second opportunity is one orbit later with an engine firing at 10:54 p.m. CDT and a landing at KSC at 11:55 p.m. The groundtrack is similar to the previous orbit's entry path.

Edwards Air Force Base will not be called up for support Tuesday night because of the good chances for landing at KSC.

Flight controllers will be keeping an eye on the weather in Florida. The primary threat to ending Columbia's mission at the Shuttle Landing Facility there is the possibility of thunderstorms within 30 miles, most likely to the west. Winds and cloud cover were not a concern leading up to the engine firing.

If Columbia lands at Kennedy Space Center it will be the 12th night landing in the Shuttle program's history. Five of those have been at Edwards Air Force Base in California and the rest have been at KSC. There have been 18 consecutive landings at KSC and 25 of the last 26 have been there. The last Edwards landing was in March 1996 with the STS-76 mission.

Additional opportunities for landing will be available on Wednesday at both landing sites if weather prevents Columbia from coming home tonight.

If Columbia lands this evening, the astronauts are due back at Ellington Field in Houston around mid-morning on Wednesday. An exact time for crew arrival will be firmed up after landing.

Columbia is orbiting the Earth every 90 minutes at an altitude of 179 statute miles with all systems operating normally.

Today's spacewalk began at 9:30 a.m. and ended at 4:18 p.m., almost exactly as planned. Total time of Tuesday's EVA was 6 hours, 48 minutes. That brings to 20 hours, 23 minutes the total time of the three spacewalks performed thus far in Discovery's mission, and the total time of space station construction spacewalks to 62 hours, 38 minutes. A fourth spacewalk is scheduled for Wednesday. It too will prepare the Z1 Truss for attachment of the solar arrays.

Chaio and McArthur were helped by the robot arm in moving around the station. Koichi Wakata and Mike Lopez-Alegria split the arm-operation duties on Tuesday, with Lopez-Alegria taking the first half.

The spacewalkers also completed power cable connections on both the Z1 truss and newly installed docking port, PMA-3. They connected and reconfigured cables to route power from Pressurized Mating Adapter-2 to PMA-3 for the arrival of Endeavour and the STS-97 crew next month. They also attached a second tool storage box on the Z1 truss, providing a place to hold the tools and spacewalking aids for future assembly flights. McArthur stocked the boxes with tools and hardware that had been attached to the Unity module. STS-96 Astronauts Tammy Jernigan and Dan Barry had left the tools on the outside of Unity during a May 1999 spacewalk.

After today's spacewalk, Discovery Commander Brian Duffy and Pilot Pam Melroy completed the second of the three station reboosts scheduled for STS-92. They fired reaction control system jets in a series of pulses of 1.4 seconds each, over a 30-minute period, gently raising the station's orbit by about 1.7 statute miles.

On Wednesday astronauts Jeff Wisoff and Lopez-Alegria are scheduled to perform the fourth and final spacewalk of the STS-92 flight. Among activities will be deployment of the Z1 utility tray, and opening and closing of the Z1 Manual Berthing Mechanism latches. Wisoff and Lopez-Alegria also will test the SAFER, or "simplified aid for EVA rescue," a backpack that could enable an astronaut drifting away from the shuttle or the station to get back to the spacecraft. Finally, they will test methods for rescuing an incapacitated astronaut.

Today's space walk, scheduled to begin just before 9:30 a.m.CDT, paves the way for installation of the station's large solar arrays later this year as Chiao and McArthur install two current converter units to process power that will be generated by the arrays, and prepare the worksite where the arrays will be attached. The converter units - called DDCUs - are 129-pound power processing systems that will provide precisely regulated power output from the massive solar arrays. With assistance from robot arm operator Koichi Wakata, who will ferry the spacewalkers around the growing station, Chiao and McArthur will unfasten the DDCUs from their locations in Discovery's payload bay and install them on the Z1 Truss in a process that will take about two hours to complete.

They will then turn their attention to final power cable connections on both the Z1 Truss and newly installed docking port, PMA-3, connecting and reconfiguring cables to route power from PMA-2 to PMA-3 for the arrival of Endeavour and the STS-97 crew next month. Finally, McArthur and Chiao will attach a second tool storage box on the Z1 Truss, providing a place to hold the tools and space walking aids that will be used during upcoming assembly flights. McArthur will retrieve a bag of tools and hardware attached to the exterior of the Unity module and place it in the storage boxes. The tools were temporarily stowed on Unity during a May 1999 space walk conducted by Astronauts Tammy Jernigan and Dan Barry during STS-96, the first shuttle docking with the International Space Station.

Overnight, space station flight controllers in Houston completed commanding a series of 16 bolts to their closed position, securing PMA-3 to its new location on the Unity module, following a planned 12-hour thermal conditioning period. The docking port, installed during yesterday's space walk, will be used by the STS-97 crew when Endeavour docks with the International Space Station.

With more time now needed to complete an analysis of the communications problems between the arm's shoulder pitch joint in its redundant or backup mode, and the arm's backup computer unit, Shuttle and Station program managers decided to postpone the launch of Atlantis on the STS-104 mission to deliver the Joint Airlock to the ISS until no earlier than early July. The next ISS assembly flight after that, STS-105 aboard Discovery, was also delayed until no earlier than early August to accommodate the Airlock mission and to allow managers to consider a replacement of the shoulder joint on the August flight during one of two spacewalks planned by Dan Barry and Patrick Forrester. No final decision on replacing the joint has yet been made.

The recently installed Canadarm2 has fully redundant computer control systems. All of the arm's joints are functioning perfectly through its primary channel, but the backup channel has run into a series of recent problems, including the unexpected activation of a switch for the arm's brakes earlier this month in the backup mode of operation during a test of the arm's wrist. That problem has not reoccurred in subsequent testing. The shoulder pitch joint problem cropped up last week during other arm checkouts when the joint experienced intermittent dropouts in communicating with the backup computer unit.

It had been hoped that a software patch developed by Canadian engineers who designed the arm would clear the communications dropouts, but it did not resolve the problem, resulting in the need for further testing and analysis. Robotics experts suspect that the problem resides in the shoulder pitch joint hardware, not the software or the computers associated with its operation. Expedition Two Flight Engineers Jim Voss and Susan Helms had hoped to perform a "dry run" of the Airlock installation procedures today, but that simulation was postponed.

The Canadarm2 is required for the grapple of the Airlock in Atlantis' cargo bay and its installation on the starboard docking port of the Unity module of the ISS. The 12 ½ ton Airlock will enable future Station spacewalks to be conducted in either U.S. or Russian spacesuits rather than from the Russian Zvezda module. The Shuttle robot arm cannot reach the Airlock installation location.

In the meantime, ISS managers will decide Friday whether to ask Voss and Expedition Commander Yury Usachev to add the replacement of the arm computer unit to a previously scheduled "internal" spacewalk in the Zvezda's spherical transfer compartment on June 8. That first ISS-based spacewalk is designed to reposition a docking mechanism in preparation for the arrival of a Russian docking module later this year. If approved, the computer replacement task would involve Usachev and Voss venturing outside the Station in Russian suits for their spacewalk before reentering Zvezda's docking compartment for the mechanism repositioning work.

Engineers are also assessing the performance of a motor on one of the two wings of the P6 solar array truss structure that enables the solar mast to track the sun as the ISS orbits the Earth. Although there is more than ample power being generated for all Station systems, the motor is generating higher than normal electrical currents and may need to be replaced on a subsequent Shuttle assembly flight.

Meanwhile, Usachev, Voss and Helms completed the unloading of an unmanned Russian Progress resupply vehicle which arrived at the ISS last week loaded with 3100 pounds of supplies, food, clothes and spare parts. A spare computer hard drive brought to the ISS on the Progress was installed in one of three central Station computers, bringing the outpost's computers back to full functionality.

Almost immediately after Atlantis departed following its mission to install an addition on the home in space, station Commander Yury Usachev, and Flight Engineers Jim Voss and Susan Helms began unpacking and stowing supplies delivered by Atlantis, while at the same time beginning to prepare for the arrival of their replacement crew.

The Expedition Three crew consists of Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin. The three will be delivered aboard Discovery by its crew of Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Dan Barry and Pat Forrester.

The STS-105 and Expedition Three crews will travel to the Kennedy Space Center in Florida Sunday and the countdown begins Monday.

While Discovery's countdown to launch to the ISS is set to begin, half a world away at the Baikonur Cosmodrome in Kazakhstan, the fifth Progress supply craft is being readied for launch Aug. 21 followed Sept. 15 by the launch of the next station component - a Russian docking compartment named Pirs, the Russian word for pier.

Expedition Two Commander Yury Usachev, Voss and Helms also continue to oversee a variety of science investigations while packing for the trip home.

The International Space Station (ISS) is orbiting in excellent shape at an altitude averaging 240 miles (385 km).

The STS-105 mission to deliver the third resident crew to the ISS is scheduled to launch tomorrow at 4:38 p.m. Central time as the ISS sails over the Southern Ocean south of Adelaide, Australia at an altitude of around 240 statute miles.

Discovery's Commander, Scott Horowitz, Pilot Rick Sturckow, and Mission Specialists Pat Forrester and Dan Barry are ready to ferry Expedition Three Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin to the Station for a four-month mission, succeeding Usachev, Voss and Helms, who have been aloft since March 8.

Discovery was cleared for launch earlier this week by Shuttle managers after reviewing the status of fuel injector units used in the hydraulic power units that steer the Shuttle's solid rocket booster nozzles during the first two minutes of powered flight.

Last night aboard the ISS, one of three command and control computers (C & C 1) which is used as a backup for the operation of some Station systems experienced a problem reading its hard drive, or Mass Storage Device. The hard drive stores commands for a variety of vehicle activities on the U.S. segment of the complex. Flight controllers attempted to reboot the computer with no success and are continuing efforts to bring it back into operation. This computer has lost only some of its functional capability. The Station's primary computer (C & C 3) is operating normally, however, and a third computer (C & C 2) is being transitioned from standby status to act as the backup for C & C 3.

A newly refurbished command and control computer had already been manifested to be launched on Discovery to the ISS as a spare, and would be installed for operation, if required. The backup computer glitch has had no impact on Station operations and will not affect the joint mission to deliver the new Expedition crew to the orbital outpost.

As Usachev, Voss and Helms prepared to handover command of the Station to a new crew, Russian engineers prepared two vehicles for launch right after the STS-105 mission. At the Baikonur Cosmodrome in Kazakhstan, a Progress resupply ship is being readied for launch on August 21 to deliver food, fuel and supplies for the new Expedition Three crew. It is scheduled to dock to the aft docking port of the Zvezda Service Module on August 23, one day after the current Progress attached to the ISS is jettisoned. And the newest ISS module, a Russian Docking Compartment named Pirs, the Russian word for pier, is in the final stages of preparation for launch on September 15 to link up to the earthward facing docking port of Zvezda. It will provide a new docking port for future visiting Russian vehicles.

In addition to packing to come home, the Expedition Two crew continues to oversee a variety of science investigations.

The International Space Station (ISS) is orbiting at an altitude averaging 240 miles (385 km).

The 15,107 kg payload consisted of:

• Bay 1-2: Orbiter Docking System/External Airlock and 3 EMU spacesuits - 2160 kg
• Bay 4P: Adapter beam with G-780 (Mayo High School, Rochester, Minnesota experiment to study germination of faba beans) and PSP-1 (NASA-GSFC canister with passive experiments and ballast) - 200 kg
• Bay 5: Integrated Cargo Carrier/KYD - 1280 kg, with the Early Ammonia Servicer for the station's P6 truss- 640 kg and two small exposure experiments PEC-1 and PEC-2, to be installed on the be installed on the ISS Quest module as part of the MISSE materials exposure program
• Bay 7-12: MPLM FM1 (Leonardo) module - 9800 kg total including 3300 kg of payload to be transferred to the Station
• Bay 13P: Adapter beam with G-774 (Microgravity Smoldering Combustion (MSC) experiment) and SEM-10 (canister with 11 school experiments) - 410 kg
• Bay 13S: Adapter beam with Simplesat and ACE avionics - 355 kg
• Sill: RMS arm - 410 kg

The Leonardo MPLM module was lifted out of Discovery's payload bay at 1326 GMT on August 13 and docked to Unity's nadir at 1554 GMT. 3300 kg of cargo from Leonardo was transferred to the Station. Then 1700 kg of station garbage and materials were loaded into Leonardo. It was unberthed from Unity at 1816 GMT on August 19 and returned to the payload bay for the return to Earth at 1917 GMT.

Discovery undocked at 1452 GMT on August 20 with the Expedition 2 crew aboard, leaving Expedition 3 at the Station.

At 1830 GMT on August 20 the Simplesat test satellite was ejected from a GAS canister in the cargo bay. Discovery landed at Kennedy Space Center at 1822:58 GMT on August 22 on runway 15, after a deorbit burn at 1715 GMT. The Expedition Two crew of Usachyov, Voss and Helms had been in space for 167 days. Discovery was taken out of service after the flight for structural inspections. Its last maintenance down period was in 1995-1996.

As the station sailed over the Pacific Ocean southwest of the border between Mexico and Guatemala, Discovery rocketed away from Launch Pad 39-A at the Kennedy Space Center at 4:10 p.m. Central time en route to a rendezvous and docking Sunday afternoon.

Aboard Discovery were Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Pat Forrester and Dan Barry along with Expedition Three Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin. They will replace the Expedition Two crew, Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms, who were wrapping up their 155th day in space at the time of Discovery's launch.

Less than nine minutes after beginning its journey, Discovery settled into its preliminary orbit as the crew prepared to open the ship's payload bay doors prior to receiving the green light to begin orbital operations. This is the fifth shuttle mission of the year.

Discovery's crew will spend the next few hours unpacking equipment, setting up computers and conducting the first in a series of engine firings to refine the shuttle's orbit as it heads for the station. The crew will begin an eight-hour sleep period shortly after 11 p.m. and will be awakened at 7:15 a.m. Saturday for its first full day in orbit. That day will be devoted to preparations for Sunday's rendezvous and docking and eight days of joint operations with the Expedition Two crew, highlighted by the official transfer of command of the station from Usachev to Culbertson.

Aboard the station, Usachev, Voss and Helms have spent most of the past couple of weeks packing gear for the trip home aboard Discovery, and tidying up for the arrival of visitors about 1:30 p.m. Sunday.

Discovery is in an orbit inclined 51.6 degrees to either side of the Equator with all of its systems operating normally.

Discovery's astronauts and cosmonauts, Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Pat Forrester and Dan Barry, and Expedition Three Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin, were awakened to "Back in the Saddle Again" by Gene Autry. It was played for Culbertson, making his third flight into space, eight years after he last flew.

At the time the crew was awakened, some 8000 statute miles separated Discovery from the ISS. A second firing of Discovery's orbital maneuvering systems engines is scheduled for early in the crew's day today to further adjust its orbit in preparation for rendezvous and docking with the station. Also scheduled today are the checkout of spacesuits to be worn by Barry and Forrester during two spacewalks next week, the preparation of rendezvous and navigation tools and a test of the shuttle's robotic arm, all routine work on the day before docking. Crewmembers also will perform a camera survey of Discovery's cargo bay with arm-mounted cameras.

Discovery is scheduled to linkup to the ISS tomorrow at 1:37 p.m. Central time as the two spacecraft fly over the Indian Ocean northwest of Australia, just south of the Indonesian island of Jawa.

The major objective of the STS-105 mission of Discovery is the swapout of the new resident Station crew, led by Culbertson, with the Expedition Two crew, Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms, who have been aboard the Station more than five months. They are to return to Earth aboard Discovery on August 22.

Discovery also is bringing equipment, supplies and scientific experiments to the Station. Almost 7,000 pounds of that cargo is in Leonardo, the Italian-built Multipurpose Logistics Module in Discovery's cargo bay. Once that is transferred to the station, Leonardo will be packed with other equipment, unused items and trash for return to Earth.

During their eight days docked to the station, Discovery Mission Specialists Barry and Forrester will perform two spacewalks. On the first, next Thursday, they will install a device called an Early Ammonia Servicer on the Station. It contains spare ammonia that could be used to cool Station systems should it be needed. During the second spacewalk, two days later, they will install heater cables for the station's large S0 truss segment, which will be delivered on a future mission, as well as handrails.

Discovery is orbiting the Earth in excellent shape with no issues being worked by the flight control team.

Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Pat Forrester and Dan Barry, along with Expedition Three Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin, checked out Shuttle systems, navigational tools and docking hardware in advance of Discovery's planned linkup to the ISS.

The docking is scheduled to occur Sunday at 1:38 p.m. Central time over the Indian Ocean northwest of Australia, just south of the Indonesian island of Jawa.

Forrester and Horowitz powered up, unfurled and checked out Discovery's 50-foot long robotic arm, which will be used by Forrester to move the Leonardo cargo module from Discovery's payload bay to the ISS for the transfer of food and supplies, and by Horowitz to transport Barry and Forrester around the Station during their two spacewalks next week.

In addition, Barry and Forrester tested the devices they will use tomorrow to measure Discovery's distance from the ISS and its rate of closure on the complex during the terminal phase of the Shuttle's approach to the Station. Discovery's docking mechanism was also checked out and its outer docking ring extended to ensure it is ready for tomorrow's capture of the ISS docking port on the forward end of the Station's Destiny laboratory module.

Next week, Barry and Forrester will test the spacesuits they will wear during their two excursions outside Discovery to attach a spare cooling reservoir to the ISS and to hook up heating cables for a large truss structure that will be mounted to the Station next year.

The crew enjoyed a few hours of spare time this afternoon to relax as they wound down for the start of an eight-hour sleep period just after 9 p.m. Central time tonight.

Aboard the ISS, Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms spent the day packing up personal items and preparing Station systems for tomorrow's arrival of their replacements, Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin. This was the 156th day in space for the current occupants of the ISS.

The exchange of crew members on the Station will occur on Monday, although formal command of the Station will not be transferred from Usachev to Culbertson until a few hours before Discovery's undocking on August 20.

Almost 7,000 pounds of food, supplies and personal items for the Expedition Three crew are housed in Leonardo, the Italian-built Multi-Purpose Logistics Module (MPLM).

Once the module is transferred to the Station and unpacked, it will be filled with equipment no longer needed on the ISS, including Expedition Two crew clothing and trash for return to Earth.

Discovery is orbiting the Earth in excellent shape with no issues being worked by the flight control team.

Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms looked on from the station's Destiny laboratory as Discovery arrived this afternoon, then worked in concert with their Shuttle counterparts to ensure a tight seal and a firm mate between the two vehicles.

At 3:41 p.m., hatches finally swung open between Discovery and the ISS, and the two crews greeted one another. First aboard the station was Culbertson to survey his home for the next four months. Within minutes, all ten astronauts and cosmonauts had shared greetings before settling in for a station safety briefing conducted by Usachev.

Monday the crews will attach the Leonardo cargo carrier to the station at about 9:30 a.m. and begin unloading its supplies.

Just prior to this operation, the two station crews will systematically begin the process of handing over command from Expedition Two to Expedition Three. The plan is for Culbertson and Helms to remove her form-fitting seat liner from the Soyuz spacecraft and replace it with Culbertson's at about 7 a.m. Two hours later at about 9 a.m., Dezhurov and Usachev will do the same followed at 12:30 p.m. by the seat liner swap of Tyurin and Voss. The Soyuz is used as a return vehicle in the event of a problem on the station.

Crew sleep is scheduled for about 8 tonight with a musical wakeup call from Mission Control at 5:10 a.m. Monday.

The station and shuttle complex is orbiting the Earth every 92 minutes in good shape.

Discovery Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Pat Forrester and Dan Barry, along with the Expedition Three crew, will begin rendezvous operations a little before 9 a.m. today. The shuttle will begin a final approach to the station from a point about 9 miles behind the outpost with the last major rendezvous maneuver scheduled at around 11:15 a.m.

With Discovery about 600 feet directly below the station, Horowitz will fly the shuttle in a quarter circle to a point in front of the complex. From there he will very slowly and precisely maneuver Discovery toward the station, pausing about 30 feet from the ISS to precisely align the docking mechanisms of the two craft.

Docking is expected to occur at 1:38 p.m. over the Indian Ocean just south of the Indonesian island of Jawa. The hatches separating the two spacecraft are to be opened around 3:30 p.m. allowing the current station residents, Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms to greet their replacements and the Discovery astronauts who will bring them home after more than five months in space.

ISS flight controllers are expected to ask the Expedition Two crew on Wednesday to try to reboot one of three command and control computers which experienced a hard drive problem last week and which has been put in standby mode with no impact to station operations. If the reboot does not recover the use of the hard drive, the crew may be asked to replace a component in the computer with a spare being brought to the station on Discovery. Two other command and control computers, a prime and a backup, are working perfectly in support of U.S. segment systems.

Discovery is orbiting the Earth every 90 minutes in good shape in pursuit of the International Space Station.

In preparation for that Extravehicular Activity (EVA), the crew spent part of the day checking out the suits that will be worn for the planned six and a half hour excursion to install an ammonia servicing unit on the outside of the station. It contains spare ammonia that could be used in the station's cooling system if needed. They also will attach an experiment to the station to expose samples of engineering materials to the space environment. The samples will be returned to Earth for analysis in about a year.

A second space walk currently is planned for Saturday to hook up heater cables for the first of several girder-like truss structures, that will be delivered to the station next year.

Meanwhile, members of the station's Expedition Two crew continued the handover of station operations to their Expedition Three replacements. Throughout the handover, the stowage of equipment and supplies inside the Leonardo Multi-Purpose Logistics Module continued. Some 5,200 pounds of supplies was confirmed on board the station and will be unpacked and stowed by the Expedition Three crew after Discovery departs early next week.

Early in the day, Russian flight controllers completed the reloading of upgraded software into the computers of the Zvezda module in preparation for next month's arrival of a new module to the station, the Russian Docking Compartment, which will serve as a new docking port for visiting Russian vehicles.

The Russian flight control team continues to track preparations of a Soyuz spacecraft set to deliver the next Progress supply vehicle to the station. Launch from the Baikonur Cosmodrome in Kazakhstan remains targeted for Tuesday with docking Aug. 23.

Early Thursday morning, the Expedition Three crew of Frank Culbertson, Vladimir Dezhurov and Mikhail Tyurin plan to televise a commemorative message marking the one-thousandth day in space for the International Space Station. It was Nov. 20, 1998 when the first element - Zarya - was launched atop a Proton rocket initiating the construction of the orbiting outpost.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 246 statute miles with no systems issues being worked by the flight control team.

The wakeup call began a day that will focus on preparations for the first of two space walks by Mission Specialists Dan Barry and Pat Forrester on Thursday, while members of the International Space Station Expedition Two crew will continue the handover of station operations to their Expedition Three replacements.

The crews also have time scheduled for logistical activities, including the transfer of more equipment and supplies from Discovery to the station and the transfer of discarded station equipment to Leonardo, the Multi-Purpose Logistics Module, which was installed on the station on Monday. The 7,000 pounds of material carried into space aboard Leonardo, including two scientific experiment racks for the U.S. Laboratory Destiny, has been unloaded.

Sturckow will assist Barry and Forrester as they checkout their spacesuits and space walking tools for their planned 61/2-hour excursion outside Discovery tomorrow. During the space walk, Barry and Forrester will install the Early Ammonia Servicer on the station's P6 truss structure. It contains spare ammonia that could be used in the station's cooling system should the need arise. They will also attach an experiment to the station to expose samples of engineering materials to the space environment. The samples will be returned to Earth for analysis in about a year.

A second space walk will be conducted by Barry and Forrester Saturday to hook up heater cables for a truss structure which will be delivered to the station next year.

Hatches between Discovery and the station will swing shut around 4:30 Central time this afternoon in advance of tomorrow's space walk

Earlier today, Russian flight controllers successfully completed the reloading of upgraded software into the computers of the Zvezda Service Module in preparation for next month's arrival of a new module to the station -- the Russian Docking Compartment -- which will serve as a new docking port for visiting Russian vehicles.

Additionally, everything remains on schedule for the launch next week of a new unmanned Progress resupply vehicle to the station, carrying more supplies and hardware for the new Expedition Three crew. The Progress will be launched from the Baikonur Cosmodrome in Kazakhstan on Tuesday and will link up to the station on Aug. 23.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 244 statute miles with no systems issues being worked by the flight control team.

Earlier today, the computers inside the Zvezda module once again assumed control of the station's attitude - or position in space -- after Russian flight controllers completed the loading of upgraded software commands to those computers. In the meantime, Discovery maintained control of the complex until the computer upgrades were completed with no impact to station operations.

The Expedition Three crew --Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin -- earlier today offered commemorative remarks on the occasion of the 1000th day in space for the International Space Station since the Zarya module was launched on Nov. 20, 1998 from the Baikonur Cosmodrome in Kazakhstan.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 244 statute miles with all systems functioning normally.

Barry and crewmate Pat Forrester will conduct the first space walk of Discovery's flight to the International Space Station at around 9:30 this morning to install the Early Ammonia Servicer on the station's P6 truss structure. The servicing unit contains spare ammonia that could be used in the station's cooling system, if needed.

They also will attach an experiment to the station to expose samples of materials to the space environment. Carrying the acronym MISSE, for Materials International Space Station Experiment, it contains about 1,500 samples of materials in two suitcase-like containers. The samples will remain outside the station for about a year, then will be returned to Earth for analysis.

Discovery Commander Scott Horowitz will operate the shuttle's robotic arm during the space walk. Pilot Rick Sturckow will serve as the space walk choreographer from inside the shuttle's cabin during the 61/2-hour space walk, which will be staged from Discovery's airlock.

A second space walk is planned for Saturday. Barry and Forrester will hook up heater cables for another truss structure to be delivered to the station next year.

Aboard the ISS, the computers of the Zvezda Service Module once again commanded the station's gyroscopes to assume control of the orientation of the complex at around 5 a.m. after Russian flight controllers completed their loading of upgraded software commands to those computers. In the meantime, Discovery maintained control of the complex until the computer upgrades were completed with no impact to station operations.

While Barry and Forrester conduct their space walk, the Expedition Three crew, Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin, will continue stowage of equipment and supplies inside the Leonardo Multi-Purpose Logistics Module for return to Earth. The Italian-built pressurized module brought almost 7,000 pounds of equipment, supplies and two scientific experiment racks to the station.

At 7:10 this morning, Culbertson and his crewmates plan to offer a few commemorative words to mark the 1000th day in space for the International Space Station since the Zarya module was launched on November 20, 1998 from the Baikonur Cosmodrome in Kazakhstan.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 244 statute miles with all systems functioning normally.

Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms continued handover briefings with the Expedition Three crew while stowage of equipment, discarded items and belongings of the Expedition Two crew continued aboard the Leonardo Multi-Purpose Logistics Module for return to Earth.

The new station Commander, Frank Culbertson, and Russian cosmonauts Vladimir Dezhurov and Mikhail Tyurin, officially took command of the station Monday afternoon to begin a four month stay on the ISS. The Expedition Two crewmembers, which spent more than five months on the station, will return home aboard Discovery next week.

In preparation for the space walk set to begin about 9 a.m. Saturday, Dan Barry and Pat Forrester reviewed procedures and checked hardware that will be used during the excursion outside the station to hook up heater cables for a truss structure to be delivered to the station next year.

Shuttle Commander Scott Horowitz and Pilot Rick Sturckow performed the mission's second reboost of the station early in the day, raising the average altitude of the ISS by 2.2 statute miles (3.5 kilometers). Discovery's thrusters were systematically fired 253 times over the course of an hour. It was the final reboost planned prior to Discovery's departure Monday morning.

The crew heads to bed about 9 tonight, Central time and will be awakened by Mission Control at 4:10 a.m. CDT Saturday.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 247 statute miles with all systems functioning well.

Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms will continue handover briefings with the Expedition Three crew. The new station commander, Frank Culbertson, and Russian cosmonauts Mikhail Tyurin and Vladimir Dezhurov have taken up residence aboard the station. The Expedition Two crewmembers, who spent more than five months on the station, will return home aboard Discovery next week.

Aboard Discovery, Commander Scott Horowitz, Pilot Rick Sturckow, and Mission Specialists Pat Forrester and Dan Barry, along with the Expedition Two crewmembers, were awakened at 4:10 a.m. Central time to the sounds of "Time Bomb", a song performed for Forrester by his sons, Patrick and Andrew.

On the heels of their successful space walk yesterday to install an ammonia coolant reservoir and a suite of experiments on the station, Barry and Forrester will be reviewing procedures and will check out hardware for the mission's second space walk on Saturday to hook up heater cables for a truss structure to be delivered to the station next year

Horowitz and Sturckow will perform the mission's second reboost of the station this morning, this one to raise the ISS' altitude by about two statute miles. The three Russian crewmembers aboard the shuttle/station complex will field questions from Russian reporters at the Russian Mission Control Center outside Moscow at 11:15 a.m. Central time. Three hours later, at 2:15 p.m., all ten crewmembers will hold a news conference with U.S. reporters at NASA centers. At 3 p.m., the crewmembers will gather for a change of command ceremony on the station as Expedition Two Commander Usachev passes the baton to Expedition Three Commander Culbertson. The formal handover of command actually occurred late Monday afternoon after the crews exchanged custom-made Soyuz seat liners for the return capsule docked to the station.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 244 statute miles with systems functioning well.

The cables would provide backup power to the S0 truss, if needed, in the unlikely event it could not be installed in a timely fashion on the station next spring as the centerpiece for a 300-foot girder, which will serve as the backbone for the orbital outposts external experiments, solar arrays and the future mobile base for the Canadian-built station robotic arm.

Barry and Forrester began their spacewalk at 8:42 a.m. Central time, and ended their final excursion outside Discovery at 2:11 p.m., completing the 26th spacewalk devoted to the assembly of the International Space Station, 24 of which were staged from the Shuttle, and the 68th spacewalk in Shuttle program history.

Other spacewalk statistics following today's activity include:

-- Total spacewalk time in Shuttle program history: 431 hours, 39 minutes. -- Total spacewalk time to assemble the ISS: 167 hours, 24 minutes. -- Total Shuttle spacewalk time for ISS assembly: 163 hours, 3 minutes. -- Total spacewalk time for the two EVAs on STS-105: 11 hours, 45 minutes.

While the spacewalk was being conducted, Expedition Three Commander Frank Culbertson and his crewmates, Vladimir Dezhurov and Mikhail Tyurin, continued loading the Leonardo cargo module on the station, which will be detached from the ISS Unity module Sunday and returned to Discovery's payload bay for the trip back home.

The astronauts and cosmonauts will begin an eight-hour sleep period at about 8 tonight Central time and will be awakened at 4:10 a.m. Sunday to begin the 10th day of this mission.

The two spacecraft are in excellent health orbiting the Earth every 90 minutes at an altitude of 250 statute miles.

Discovery's astronauts, including the returning Expedition Two crew, were awakened at 4 a.m. Central time by "Hotel California," performed by the Eagles. It was requested for Expedition Two Commander Yury Usachev by his wife.

The new station crew, Commander Frank Culbertson and Cosmonauts Vladimir Dezhurov and Mikhail Tyurin, are beginning a four-month stay on the station. They will be separated from Discovery's crew by closed hatches to accommodate today's space walk

Barry and Forrester are to emerge from the shuttle's airlock a little after 9 a.m. Central time. Commander Scott Horowitz will operate the shuttle's robotic arm to move the space walkers around while Pilot Rick Sturckow will serve as the space walk choreographer.

The heating cables Barry and Forrester will install are for the S0 truss, to be delivered to the station next year. The space walk is the 26th in support of the assembly of the International Space Station and is expected to last around 6 hours.

Discovery and the station are orbiting the Earth every 90 minutes at an average altitude of 246 statute miles with all systems functioning well.

The ten crewmembers aboard Discovery and the station are spending their final day and night together prior to the farewell ceremony and hatch closing scheduled for about 7 a.m. CDT tomorrow. That follows the wakeup call from Mission Control set for 4:40 a.m.

Leonardo brought almost 7,000 pounds of material to the station, including equipment, supplies and two scientific racks for the new Expedition Three crew of Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin. Leonardo - one of three pressurized cargo carriers provided by the Italian Space Agency - completes its second visit to the station.

Astronaut Pat Forrester carefully removed the high-tech moving van from the station and placed it back in Discovery's payload bay at 2:15 p.m. CDT. He was backed up throughout the operation by Discovery Commander Scott Horowitz, who operated the arm during the spacewalks by Forrester and Dan Barry to outfit the station with spare equipment and scientific gear.

Once Discovery departs, Pilot Rick Sturckow will perform a strategic fly around of the station at a distance of about 400 feet before firing thrusters shortly after 11 a.m. to depart the vicinity of the complex. Wednesday afternoon, Discovery is set to return to the Kennedy Space Center with the Expedition Two crew of Yury Usachev, Jim Voss and Susan Helms. The three departed the Florida spaceport March 8 and will return after 167 days in space.

Meanwhile, Russian space officials are set to launch the fifth Progress resupply craft to the International Space Station Tuesday at 4:24 a.m. Central time followed by an automatic docking early Thursday. The Progress will carry supplies, food and equipment for the new Expedition Three crew. Its predecessor will be undocked Wednesday and commanded to burn up harmlessly in Earth's atmosphere.

Discovery and the ISS are orbiting the Earth every 90 minutes at an altitude of 246 statute miles with all systems functioning normally.

Discovery's crew, including the returning Expedition Two crewmembers, were awakened shortly after 4 a.m. Central time by the sounds of "Under the Boardwalk" by the Drifters, played for Jim Voss by his wife Suzan.

Leonardo brought almost 7,000 pounds of material to the station, including equipment, supplies and two scientific racks for the new Expedition Three crew of Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin. Leonardo, which is one of three pressurized cargo carriers for station resupply activities provided by the Italian Space Agency, is completing its second visit to the station.

Mission Specialist Pat Forrester will use the shuttle's robotic arm this afternoon to unberth Leonardo from the station and move it to Discovery, beginning the one-hour operation a little before 12:30 p.m. He will be backed up by Discovery Commander Scott Horowitz, who operated the arm during two successful space walks by Forrester and Dan Barry to outfit the station with critical spare equipment and scientific gear.

Overnight, controllers reworked the crewmembers' flight plan to give them some time off this afternoon after Leonardo is returned to Discovery. The day will be highlighted by final handover discussions between the two Expedition crews before hatches are closed one last time between Discovery and the station tomorrow morning just before 7 a.m. Central time. Discovery is scheduled to undock from the ISS at 9:52 a.m. Central time Monday to set the stage for a landing at the Kennedy Space Center Wednesday afternoon, completing 167 days in space for Expedition Two Commander Yury Usachev, Voss and Susan Helms.

Meanwhile, Russian space officials are all set to launch a new Progress resupply craft to the International Space Station on Tuesday at 4:24 a.m. Central time for a docking early Thursday. The Progress will carry supplies, food and equipment for the new Expedition Three crew. The Progress currently docked to the aft end of the Zvezda Service Module will be undocked on Wednesday and commanded to a destructive reentry in Earth's atmosphere.

Discovery and the ISS are orbiting the Earth every 90 minutes at an altitude of 246 statute miles with all systems functioning normally.

The final farewells and hatch closing are scheduled for just before 7 a.m. Central time. Discovery's crewmembers, Commander Scott Horowitz, Pilot Rick Sturckow, and Mission Specialists Pat Forrester and Dan Barry, assisted by the returning Expedition Two crew, Commander Yury Usachev and Astronauts Jim Voss and Susan Helms, will undock Discovery at 9:52 a.m. as the two craft sail over the south Pacific due west of the southern coast of Chile.

With Sturckow at the controls, the shuttle will conduct a flyaround of the station, circling it 11/4 times before the shuttle's jets are fired at 11:12 a.m. to drop Discovery into a lower orbit for final separation from the station.

The seven crewmembers aboard Discovery were awakened at 3:40 a.m. by the sounds of "Brand New Day," played by Sting. The song was for Helms, requested by her family and friends. She and her Expedition Two crewmates are wrapping up five and a half months on orbit.

Parked in Discovery's cargo bay is Leonardo, the Multi-Purpose Logistics Module that brought 7,300 pounds of material to the station, including equipment, supplies and two scientific racks. It is returning to Earth with almost 2 tons of unneeded equipment from the station, trash and personal effects of the Expedition Two crew.

Expedition Three Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin are beginning a science-intensive increment that is scheduled to end with their replacement by the Expedition Four crew late this year.

Also on today's schedule for Discovery's crewmembers after undocking is the deployment of a small science satellite called Simplesat, designed to evaluate the use of inexpensive commercially available hardware in space. It is designed to demonstrate GPS attitude control and pointing in free flight. It will be spring-ejected from a canister at the rear of the Shuttle's cargo bay.

The Russians are all set to launch an unmanned Progress resupply craft from the Baikonur Cosmodrome in Kazakhstan tomorrow at 4:24 a.m. Central time. It is the fifth Progress to be launched to the station, and is scheduled to dock a little after 5 a.m. on Thursday, the day after the current Progress attached to the ISS is undocked from the rear of the Zvezda Service Module to burn up in the atmosphere with its load of trash.

Discovery and the ISS are circling the Earth every 90 minutes at an altitude of 246 statute miles. All systems are functioning well.

Discovery Commander Scott Horowitz, Pilot Rick Sturckow, and Mission Specialists Pat Forrester and Dan Barry, along with Expedition Two crewmembers Commander Yury Usachev, and Astronauts Jim Voss and Susan Helms, were awakened at 3:10 a.m. CDT to the sounds of "East Bound and Down" by Jerry Reed, at the request of their Houston-based training team.

Activities on board Discovery will focus on tomorrow's planned return trip to Earth as the astronauts stow away the equipment and hardware used during their mission and verify the performance of Discovery's landing systems. Horowitz, Sturckow and Barry will conduct the standard day-before-landing checkouts of the flight control surfaces, the rudder and flaps that will control the shuttle during its descent through the atmosphere.

Later in the day, they will set up three recumbent seats on Discovery's middeck for use by the returning Expedition Two crewmembers during Wednesday's re-entry. The seats are designed to minimize the forces of reentry after their more than five months in space.

Expedition Three crewmembers Frank Culbertson, Vladimir Dezhurov and Mikhail Tyurin, were awakened about 12:30 a.m. to begin their first day alone aboard the space station. The day's plan includes activation and checkout of Express Rack 4 - one of two scientific racks for the U.S. laboratory Destiny delivered during STS-105 - exercise and a review of plans for unloading the next Russian unpiloted cargo carrier, Progress 5, scheduled to arrive at the station Thursday morning.

Crewmembers also activated the current Progress vehicle, docked at the rear of the station's Zvezda module, before closing the hatches that connect it to the station. Progress 4 is scheduled to be undocked from the station shortly after 1 a.m. Wednesday. The new Progress supply ship - Progress 5 - was launched on a Soyuz rocket at 4:24 a.m. today from the Baikonur Cosmodrome in Kazakhstan and is scheduled to dock at the station about 5 a.m. Thursday with its cargo of fuel, food and equipment.

Discovery is circling the Earth every 90 minutes at an average altitude of about 240 statute miles. Systems aboard the shuttle and the International Space Station are functioning well.

Discovery is about 1,300 statute miles ahead of the space station and widening the gap by about 50 miles per 90-minute orbit. The seven-member crew - Commander Scott Horowitz, Pilot Rick Sturckow, Mission Specialists Dan Barry and Pat Forrester, along with the returning Expedition Two crew members, Commander Yury Usachev and Flight Engineers Susan Helms and Jim Voss - were awakened at 3:10 a.m. CDT to begin a day with two landing opportunities at Florida's Kennedy Space Center. Weather conditions in Florida hold promise for today's landing, but the entry team of flight controllers will be watching for a chance of rain near the landing site.

The first opportunity would see a deorbit burn at 10:37 a.m., resulting in an 11:46 a.m. CDT (12:46 p.m. EDT) landing. Discovery would descend across southern Mexico, cross the Bay of Campeche, skirt the northwestern tip of the Yucatan Peninsula, and cross the Gulf of Mexico before making landfall on Florida's western coast. For the second opportunity, the deorbit burn would occur at 12:17 p.m. The shuttle would cross northern Mexico, descend over the Rio Grande near Laredo, and fly along the Gulf Coast before crossing the Florida peninsula for a 1:23 p.m. landing.

Aboard the International Space Station, the Expedition Three crew - Commander Frank Culbertson and Cosmonauts Vladimir Dezhurov and Mikhail Tyurin - were awakened a little after midnight for the undocking of the Progress 4 vehicle. That spacecraft was moved to make way for the Progress 5 cargo vehicle which launched at 4:24 a.m. Tuesday from the Baikonur Cosmodrome in Kazakhstan and is scheduled to dock at the rear of the space station's Zvezda Service Module about 5 a.m. tomorrow.

Progress 4 docked to the space station last May 22 with a cargo of equipment, food, fuel and spare computer parts. After unloading, it was refilled with trash. Just before 1 a.m. flight controllers at Moscow's Mission Control Center sent the command for it to undock. About three minutes later, springs pushed it away from the station, and three minutes after that, Progress jet thrusters were fired to increase the separation rate. At about 4 a.m. a deorbit burn command initiated its descent to fiery destruction in the Earth's atmosphere.

Discovery is circling the Earth every 90 minutes at an average altitude of about 240 statute miles. Systems aboard the shuttle and the space station are functioning well.

Following a one-orbit wave-off due to a rain shower that popped up off the end of the landing strip, STS-105 Commander Scott Horowitz fired Discovery's engines to begin the shuttle's return through the atmosphere, concluding a 4.3 million mile voyage. On Discovery's middeck, the Expedition Two crew - Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms - rode home in recumbent seats designed to lessen the effects of gravity.

Following routine medical examinations, the STS-105 crew - Horowitz, Pilot Rick Sturckow and Mission Specialists Dan Barry and Pat Forrester - along with the Expedition Two crew, will be reunited with their families. All seven crewmembers are expected back in Houston about 5 p.m. Thursday for a public welcome home ceremony at Ellington Field.

During their 12 days on orbit, the STS-105 astronauts worked with both the returning Expedition Two crew and newly-arrived Expedition Three crew to transfer more than two tons of experiment hardware, food and logistical supplies between Discovery and the station. In addition, Barry and Forrester performed two spacewalks to prepare the station for future growth.

In the meantime, aboard the International Space Station, the Expedition Three crew - Commander Frank Culbertson and Cosmonauts Vladimir Dezhurov and Mikhail Tyurin - are preparing for the arrival of a Progress 5 cargo vehicle which is scheduled to dock to the aft docking port of the Zvezda module of the Station about 5 a.m. tomorrow.

The unmanned Progress 5 craft linked up to the aft docking port of the Zvezda Service Module at 4:51 a.m. Central time (951 GMT) after an automated two-day excursion following its launch Tuesday from the Baikonur Cosmodrome in Kazakhstan. The docking occurred over Central Asia.

Within a few minutes after docking, hooks and latches were commanded to close between the Progress and Zvezda, forming a hard mate and a tight seal between the two craft. Hatches between the two vehicles will be opened later today, enabling Station Commander Frank Culbertson, Pilot Vladimir Dezhurov and Flight Engineer Mikhail Tyurin to unload some 3000 pounds of supplies and personal effects.

The arrival of the Progress vehicle at the Station sets the stage for the launch of the next module for the outpost next month --- the Russian Docking Compartment named Pirs, the Russian word for pier. The Docking Compartment will automatically link up to the nadir, or earthward facing docking port of Zvezda two days after launch, providing an additional docking port for future Russian vehicles arriving at the ISS.

At the Kennedy Space Center, Expedition Two Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms are in excellent shape, readapting to gravity and enjoying life back on Earth after167 days in space, 163 days of which were spent aboard the ISS. They are scheduled to return to Ellington Field in Houston late this afternoon with their Discovery crewmates, Commander Scott Horowitz, Pilot Rick Sturckow and Mission Specialists Pat Forrester and Dan Barry