Johnson Gregory H Credit - www.spacefacts.de

Personal: Male, Married, Three children. Born in Upper Ruislip, Middlesex, UK. US Air Force US Air Force

Astronaut Career

Astronaut Group: NASA Group 17 - 1998. Active Entered space service: 4 June 1998. Number of Flights: 1.00. Total Time: 15.76 days.

NAME: Gregory H. Johnson (Major, USAF)

NASA Astronaut Candidate (Pilot)

PERSONAL DATA:

Born on May 12, 1962 in Upper Ruislip, Middlesex, United Kingdom. Married to the former Cari M. Harbaugh of Lubbock, Texas. They have three children: Matthew, Joseph and Rachel. Recreational interests include traveling, biking, golfing, music, and woodworking. His parents, Harold C. and Marion F. Johnson, reside in Traverse City, Michigan. Cari's mother, Beverly S. Harbaugh, resides in Lubbock, Texas. Her father and stepmother, George R. and Arlene Harbaugh, also reside in Lubbock, Texas.

EDUCATION:

Fairborn High School, Fairborn, Ohio, 1980.
B.S., Aeronautical Engineering, United States Air Force Academy, 1984.
M.S., Flight Structure Engineering, Columbia University, 1985.

SPECIAL HONORS:

1996 Lieutenant General Bobby Bond Award – Top USAF test pilot, Distinguished Graduate USAF Test Pilot School Class 94A, Onizuka "Prop Wash" Award (94A), 1985 Guggenheim Fellowship to Columbia University, Distinguished Graduate with Honors – USAF Academy Class of 1984, Valedictorian – Park Hills High School Class of 1980, Eagle Scout. Military decorations include Distinguished Flying Cross, Meritorious Service Medal, Air Medals (4), Aerial Achievement Medals (3), Air Force Commendation Medal, Air Force Achievement Medals (2), and various others.

EXPERIENCE:

Johnson received his commission from the United States Air Force Academy in May 1984 and was designated an Air Force pilot in May 1986 at Reese Air Force Base, Texas. He was retained as a T-38A instructor pilot at Reese until 1989, when he was selected for an F-15E Eagle assignment. In March 1990, he reported to the 461st F-15E Replacement Training Unit at Luke Air Force Base, Phoenix, Arizona for initial F-15E training. After completion, he was assigned to the 335th Fighter Squadron, 4th Fighter Wing at Seymour Johnson Air Force Base, North Carolina. Immediately after he was designated "mission ready" in December 1990, Johnson deployed to Al Kharj, Saudi Arabia, flying 34 combat missions in support of OPERATION DESERT STORM. In December 1992, he was again deployed to Saudi Arabia for three months, flying an additional 27 combat missions in support of OPERATION SOUTHERN WATCH. In 1993, he was selected for Air Force Test Pilot School at Edwards Air Force Base, California, where he graduated in December 1994. After graduation, he was assigned to the 445th Flight Test Squadron at Edwards, where he was a project test pilot, F-15C/E and T-38 instructor/evaluator, program manager, and assistant operations officer. In August 1997, he was assigned to Maxwell Air Force Base, Alabama, to attend Air Command and Staff College in residence. Just prior to graduation in June 1998, Johnson learned of his selection for astronaut training.

He has logged over 2,700 flight hours in more than 30 different aircraft.

NASA EXPERIENCE:

Selected by NASA in June 1998, he reported for training in August 1998. Astronaut Candidate Training includes orientation briefings and tours, numerous scientific and technical briefings, intensive instruction in Shuttle and International Space Station systems, physiological training and ground school to prepare for T-38 flight training, as well as learning water and wilderness survival techniques. Following a period of training and evaluation, Johnson will receive technical assignments within the Astronaut Office before being assigned to a space flight.

• 11 March 2008 Flight: STS-123. Flight Up: STS-123. Flight Back: STS-123. Flight Time: 15.76 days.

16 February 2008 - STS-122 MCC Status Report #18. The 10 crew members aboard the International Space Station/space shuttle Atlantis complex today will continue with the outfitting of the new Columbus research module, give the station a reboost to get it ready for its next visitors and spend some time tal

king with reporters on Earth.

The crew was allowed to sleep in about 30 minutes after Friday's long spacewalk. This morning's wake-up call -'I Believe I Can Fly,' performed by Yolanda Adams and Kenny G and played for Mission Specialist Leland Melvin -came at 2:20 a.m. CST.

Columbus outfitting and transfer operations will continue throughout the day, and the crew will be reconfiguring the tools and suits used during Friday's spacewalk.

At 6:16 a.m., the shuttle will fire its propulsion system for 36 minutes to reboost the orbit of the space station. This will allow the station to achieve the proper alignment needed in advance of next month's arrival of Endeavour on the STS-123 mission.

And then at 7:40 a.m., all 10 members of the shuttle and station crews will participate in the traditional joint crew news conference. Reporters at Johnson Space Center in Texas, Kennedy Space Center in Florida, the European Space Agency's European Astronaut Centre in Cologne, Germany, and the French Space Agency Headquarters in Paris will be participating in the question-and-answer session.

Toward the end of the day, Pilot Alan Poindexter and mission specialists Rex Walheim and Stanley Love will have some off-duty time. Walheim and Love performed Friday's spacewalk, and Poindexter worked inside as their intravehicular officer.

The sampling kit was then stowed away. Leo's next NUTRITION/Repository activity will be his Flight Day 30 (FD30) session. (The current NUTRITION project is the most comprehensive in-flight study done by NASA to date of human physiologic changes during long-duration space flight. It includes measures of bone metabolism, oxidative damage, nutritional assessments, and hormonal changes, expanding the previous Clinical Nutritional Assessment profile (MR016L) testing in three ways: Addition of in-flight blood & urine collection (made possible by MELFI), normative markers of nutritional assessment, and a return session plus 30-day (R+30) session to allow evaluation of post-flight nutrition and implications for rehabilitation.)

Additional Details: ISS On-Orbit Status 02/27/08.

Progress thrusters (DPO) were inhibited and not involved. (Crew activities focused on TORU activation, inputting commands via the RUO Rotational Hand Controller and close-out ops. TORU lets an SM-based crewmember perform the approach and docking of automated Progress vehicles in case of failure of the automated KURS system. Receiving a video image of the approaching ISS, as seen from a Progress-mounted docking television camera ('Klest'), on a color monitor ('Simvol-Ts', i.e. 'symbol center') which also displays an overlay of rendezvous data from the onboard digital computer, the crewmember steers the Progress to mechanical contact by means of two hand controllers, one for rotation (RUO), the other for translation (RUD), on adjustable armrests. The controller-generated commands are transmitted from the SM's TORU control panel to the Progress via VHF radio. In addition to the Simvol-Ts color monitor, range, range rate (approach velocity) and relative angular position data are displayed on the 'Klest-M' video monitor (VKU) which starts picking up signals from Progress when it is still approximately 7 km away. TORU is monitored in real time from TsUP over Russian ground sites (RGS) and via Ku-band from Houston, but its control cannot be taken over from the ground.)

Additional Details: ISS On-Orbit Status 02/28/08.

STS-123/Endeavour (ISS-1J/A) lifted off spectacularly in darkness early this morning right on time (2:28am EDT) with all systems performing nominally, for rendezvous with ISS tomorrow (3/12, Wednesday) and docking at approximately 11:25pm EDT. The Orbiter is carrying the seven-member crew of Commander Dominic L. Gorie, Pilot Gregory H. Johnson and Mission Specialists Richard M. Linnehan, Robert L. Behnken, Michael J. Foreman, Takao Doi and Garrett E. Reisman. Reisman will replace LĂ(c)opold Eyharts as ISS Flight Engineer 2, who returns on 3/26 (nominal) with STS-123. STS-123 is the 122nd space shuttle flight, the 21st flight for Endeavour, the 25th flight to the station and the second of six Shuttle flights planned for 2008 (including the Hubble Service Mission 4). Its primary payloads are the 18,490-lbs Japanese Experiment Logistics Module-Pressurized Section (ELM-PS or JLP) and the 3,400-lbs Canadian Special Purpose Dexterous Manipulator (SPDM) 'Dextre'. We are off to another great mission!

Additional Details: ISS On-Orbit Status 03/11/08.

The crew was awakened at 3:28 p.m. by the Vince Guaraldi Trio's 'Linus & Lucy.' The song, which is from the album 'A Charlie Brown Christmas,' was played for Mission Specialist Mike Foreman.

The main activity of the day is the standard inspection of Endeavour's heat shield to ensure it is in good condition following launch. Commander Dominic Gorie, Pilot Gregory H. Johnson and Mission Specialist Takao Doi will use the shuttle's robotic arm and orbiter boom sensor system to scan the shuttle's wing leading edges and nose cap. The survey results will be sent to the ground for analysis.

Mission Specialists Robert L. Behnken, Rick Linnehan and Garrett Reisman will check out spacesuits in preparation for the five spacewalks they and Foreman will perform while at the International Space Station. Foreman has several other activities scheduled for the day, including preparations for Wednesday's docking with the station.

The station crew also is preparing for Wednesday's docking. Commander Peggy Whitson and Flight Engineers Yuri Malenchenko and Leopold Eyharts started their day at 3 p.m., after a shortened sleep period that allowed them to align their schedules with that of the shuttle crew.

Aboard the shuttle are Commander Dominic Gorie, Pilot Gregory H. Johnson and Mission Specialists Robert Behnken, Mike Foreman, Rick Linnehan, Garrett Reisman and Takao Doi, a Japan Aerospace Exploration Agency astronaut.

Endeavour will deliver the first component of the Japanese laboratory complex, Kibo, to the station. Kibo, which means "Hope" in English, is the major contribution of Japan to the International Space Station. The laboratory complex will take three shuttle flights to assemble. Endeavour also is carrying an intricate robotics system called Dextre that was developed for the station by the Canadian Space Agency. The two-armed robot will be attached to the end of the station's robotic arm to handle smaller tasks that otherwise would require a spacewalk to accomplish.

The STS-123 mission will be the longest mission to date to the station and will include five spacewalks.

International Space Station Expedition 16 Commander Peggy Whitson and Flight Engineers Yuri Malenchenko and Leopold Eyharts were awake beginning their workday when Endeavour launched. Reisman will become a member of the station crew after docking as he trades places with Eyharts, who will return to Earth aboard Endeavour once it departs the station.

Endeavour's crew will begin a sleep period at 7:28 a.m. today and awaken at 3:28 p.m. to begin its first full day in space. The shuttle is scheduled to dock to the station at 10:20 p.m. Wednesday.

Commander Dom Gorie and his crewmates, Pilot Greg Johnson and Mission Specialists Bob Behnken, Mike Foreman, Takao Doi, Rick Linnehan and Garrett Reisman, early Wednesday completed a five-hour inspection of Endeavour's heat shield using the shuttle's robotic arm and the Orbiter Boom Sensor System. Imagery analysts and engineers on the ground will add these sensor images to those collected at launch and during the climb to orbit and continue their analysis of the orbiter's heat shield.

Additionally the STS-123 crew checked out the tools that will be used during Wednesday's rendezvous and docking to the station; installed the centerline camera that will be used during docking; and extended the outer ring of the Orbiter Docking System.

Spacewalkers Linnehan, Foreman, Behnken and Reisman checked the spacesuits that they will wear during the mission's five planned spacewalks.

On board the space station, Commander Peggy Whitson and Flight Engineers Yuri Malenchenko and Leopold Eyharts readied the station for the arrival of Endeavour by conducting a leak check of the docking port attached to the Harmony node.

About an hour before docking as the shuttle approaches the station, Gorie will perform the rendezvous pitch maneuver -an orbiter back-flip -600 feet below the station that will allow Whitson and Malenchenko to take hundreds of detailed images of the orbiter's underside. With the pitch maneuver complete, Gorie will fly the shuttle to a point about 300 feet in front of the station and then slowly ease the orbiter back to a docking.

STS-123 is budgeted for 16 days -the longest mission to the station -and will deliver the Japanese logistics compartment and the Canadian dextrous robot arm to their permanent home. A record five spacewalks will be performed while Endeavour is docked to the station to assist with the robotic attachment of the small logistics module and the assembly of Dextre -the Special Purpose Dextrous Manipulator that will extend the reach and capability of the station's robotic arm.

Endeavour's crew is scheduled to go to sleep at about 7 a.m. with the wakeup call from Mission Control scheduled for 2:58 Wednesday afternoon.

STS-123/Endeavour docked smoothly last night at 11:49pm EDT at the PMA-2 (Pressurized Mating Adapter-2) port, 24 minutes behind schedule (due to loss of target lock by the CW {Continuous Wave} laser of the Shuttle's TCS {Trajectory Control Sensor} during the manual rendezvous phase, requiring manual lock re-acquisition). The RPM (R-Bar Pitch Maneuver) started at 10:26pm and was successfully completed at 10:34pm, with Whitson and Malenchenko taking 200-300 close-up photographs of Endeavour's bottom heatshield. The station now hosts ten occupants again as Mission 1J/A is underway. (At the point of docking, Peggy Whitson rang the traditional ship's bell and announced 'Endeavour landed!' The combined crew is comprised of ISS CDR Whitson, FE-1 Yuri Malenchenko, FE-2 LĂ(c)opold Eyharts, STS CDR Dominic Gorie, PLT Gregory Johnson, MS1 Robert Behnken, MS2 Mike Foreman, MS3 Takao Doi (Japan), MS4 Rick Linnehan, and MS5/FE-2-16 Garrett Reisman who replaces Eyharts as FE-2, as the latter returns on the Endeavour as MS-5.)

Additional Details: ISS On-Orbit Status 03/13/08.

Shuttle Commander Dom Gorie started the approach with the Terminal Initiation burn earlier Wednesday evening leading to the Rendezvous Pitch Maneuver at 9:26 p.m. From a distance of 600 feet below the station, Gorie manually flew the shuttle through a well-timed backflip allowing the station crew to photograph the shuttle's heat shield. The photos are being analyzed by engineers in Mission Control to ensure the heat shield is in good condition.

Following docking and leak checks, the hatches between the two spacecraft were opened at 12:36 a.m. Thursday.

Expedition 16 Commander Peggy Whitson, joined by Flight Engineers Yuri Malenchenko and Leopold Eyharts, welcomed the shuttle crew onboard and provided an orientation of station operations and safety before proceeding to the remaining tasks.

The first 'transfer' item after hatch opening was swapping Mission Specialist Garrett Reisman for Expedition 16 Flight Engineer Eyharts from the European Space Agency.

The transfer was official when the form-fitting Soyuz seatliners were swapped at 2:50 a.m. Eyharts officially spent 33 days as a member of Expedition 16. With an on-time landing March 26, Eyharts will have spent 48 days in space.

The crew also prepared for the mission's first spacewalk, set to begin Thursday evening by Mission Specialist Rick Linnehan and Expedition 16 Flight Engineer Reisman.

Linnehan and Reisman transferred spacesuits to the station, and will spend the night in the Quest Airlock as part of the routine "campout" prebreathe protocol. The spacewalk will take about 6.5 hours as they plan to prepare the Japanese Experiment Logistics Module-Pressurized Section for unberthing from the payload bay. They also will work on some of the initial outfitting and assembly of the Special Purpose Dextrous Manipulator's two arms.

In preparation for that task, using the Canadarm2, Pilot Gregory Johnson and Mission Specialist Robert Behnken unberthed the Spacelab Pallet containing the Dextre and mated it to a temporary location on the station's Mobile Base System.

Mission Specialists Mike Foreman and Takao Doi commenced with the initial transfer work that will continue throughout the docked phase and set up photo and TV equipment between the two vehicles. The crews are scheduled to go to bed about 7 a.m. and wake up at 3:28 p.m.

f the Japan Aerospace Exploration Agency's Kibo laboratory, was installed on the station early Friday morning.

With Japan Aerospace Exploration Agency astronaut Takao Doi at the controls and assisted by Commander Dominic Gorie, the JLP was gently attached to its interim location on the Harmony Node 2 module at 3:06 a.m. CDT. The module, which primarily will be used for storage space atop the larger Kibo Laboratory, will be relocated to its permanent location after the arrival of Kibo on space shuttle Discovery's STS-124 mission in May.

Preparations for the move were among the tasks accomplished in today's spacewalk, the first of five planned for the mission. Mission Specialist Rick Linnehan and Expedition 16 Flight Engineer Garrett Reisman ventured out of the pressurized confines of the station at 8:18 p.m. to begin the 7-hour, 1-minute spacewalk, which ended at 3:19 a.m.

Once outside the Quest Airlock, they first removed a thermal cover to reveal the Centerline Berthing Camera System on top of the Harmony module. The system provides live video to assist with docking spacecraft and modules together and was used for the attachment of the Japanese Logistics Module - Pressurized Section.

Once in the shuttle's payload bay, the two spacewalkers removed contamination covers from the JLP docking mechanism. They also disconnected other power and heater connections, preparing it for its removal.

Next, the two headed to the port truss segment where they worked on the initial assembly of the Special Purpose Dexterous Manipulator, known as 'Dextre.' They installed both the Orbital Replacement Unit/Tool Changeout Mechanisms (OTCMs) -the 'hands' of Dextre's arms. The OTCMs are parallel jaws that can hold a payload or tool. They each also have a retractable motorized socket wrench to turn bolts and mate or detach mechanisms, as well as a camera and lights.

Initial attempts to route power to Dextre were not successful Thursday after its unassembled components were temporarily parked on the station's truss in a pallet structure. Canadian Space Agency engineers spent the day developing a software patch to bypass what was initially believed to be a problem in a communications path from the station's robotic workstation to the new device.

But Pierre Jean, CSA's acting ISS program manager, told a Friday morning briefing that a problem with a cable harness on Dextre's pallet housing, and not the robot itself, might be the cause for the initial power glitch. Jean said the grapple of Dextre by the station's Canadarm2 robotic arm later today should initiate the routing of power to Dextre to set the stage for the rest of its assembly over the next few days.

Pilot Greg Johnson also supported the spacewalk activity, overseeing the video operations and Mission Specialist Mike Foreman served as the intravehicular officer, assisting with the choreography of the spacewalks.

Meanwhile, Expedition 16 Commander Peggy Whitson assisted with the pre- and post-spacewalk activities, while Flight Engineer Yuri Malenchenko worked in the Russian segment.

Friday's spacewalk marks the 105th devoted to assembly and maintenance of the station with a total cumulative time of 660 hours. The second spacewalk is scheduled for Saturday night.

The astronauts started their day at 3:35 p.m. to the tune of The Byrds' 'Turn! Turn! Turn! (To Everything There is a Season).' The song was played for Mission Specialist Rick Linnehan.

Linnehan will be one of the first three crew members to enter the station's new module, the Japanese Experiment Logistics Module, Pressurized Section -or JLP, for short. Preceding him will be Japanese Space Agency astronaut Takao Doi and station Commander Peggy Whitson. That entry is scheduled to take place at 11:18 p.m.

But before that can happen, Doi, Linnehan and Whitson will spend several hours outfitting the vestibule between the station and the module and beginning activation of the module.

Work will also be done on Endeavour's other main cargo, the Special Purpose Dexterous Manipulator. When Dextre, as the robot is known, was removed from the shuttle's cargo bay after the shuttle docked to the station, ground teams ran into problems routing power to the pallet on which the robot is being assembled. The teams tried troubleshooting the problem with a software patch early this morning, but were not successful.

The next round of troubleshooting is scheduled to start at 8:53 p.m. In hopes of showing that the problem is in the pallet, not the robot itself, Mission Specialists Bob Behnken and Leopold Eyharts will grapple Dextre with the space station's robotic arm, Canadarm2, and attempt to power the robot through the robotic arm.

Shuttle Commander Dominic Gorie, Pilot Gregory H. Johnson and station Flight Engineer Garrett Reisman will take about 20 minutes out of their schedule at 12:28 a.m., to talk with reporters from ABC News, Space.com and Florida Today.

The astronauts will wrap up the fifth day of their mission by reviewing procedures for the mission's second spacewalk. Spacewalkers Linnehan and Mission Specialist Mike Foreman will spend their sleep period in the station's Quest Airlock in preparation for that spacewalk on Saturday.

The space shuttle Endeavour's crew members received their wakeup call at 1:31 p.m. CDT. Their wakeup song for the day was 'Sharing the World,' a song written by Pilot Gregory H. Johnson's brother.

Mission Specialists Rick Linnehan and Robert L. Behnken will spend the day outside the station, performing the mission's third spacewalk. During this spacewalk, the spacewalkers will be finishing up the assembly of Dextre, the Canadian Space Agency's Special Purpose Dexterous Manipulator. They'll add a tool holster, a stowage platform and a camera system to the robot, and then remove thermal covers that have been protecting the robot's system during its assembly.

The spacewalkers will also get the Spacelab Logistics Pallet on which the robot was assembled ready for return to Earth in the shuttle's cargo bay, and install some spare equipment -a yaw joint for the station's robotic arm, Canadarm2, and two spare direct current switching units -on the station's exterior for future use.

Before heading back into the station, Behnken will also install on the station's exterior Materials International Space Station Experiment 6A and 6B. MISSE 6 is a science experiment that will gather data on how materials and coatings are affected by the extreme environment of space. It's scheduled to stay outside the station for about six months.

The spacewalk is scheduled to start at 6:23 p.m. and should last about six and a half hours.

Crew sleep cycle today: Sleep 6:00am -2:30pm; wake 2:30pm -6:00am tomorrow.

EVA-3 was completed successfully by Rick Linnehan and Bob Behnken in 6h 53m, accomplishing most of its objectives.
(During the spacewalk, Linnehan (EV1) & Behnken (EV2) -

Installed the OTP (ORU {On-Orbit Replaceable Unit} Temporary Platform) and THA (Tool Holder Assembly) on the SPDM (Special Purpose Dexterous Manipulator),
Removed MLI (Multi-Layered Insulation) thermal blankets,
Installed the CLPA (Camera, Light & Pan/Tilt Assembly) on the SPDM,
Cleaned up & configured the SLP (Spacelab Pallet) for return (to be transferred with the SSRMS (Space Station Remote Manipulator System) from the POA (Payload ORU Attachment) to the Orbiter PLB (Payload Bay) tomorrow evening (FD9)),
Transferred the spare SSRMS yaw joint from the PLB to stowage on the ESP-2 (External Stowage Platform 2),
Transferred two spare DCSUs (Direct Current Switching Units) from the PLB to stowage on the ESP-2,
Transferred the LWAPA (Light Weight Adapter Plate Assembly) for installation on the Columbus EPF (External Payload Facility) and prepared for the installation of two MISSE-6 (Materials International Space Station Experiment) payloads,
Removed the MCAS EBCS (Mobil Common Attachment System External Berthing Camera System) cover flap as a get-ahead, and
Stowed the JLP (JEM Experiment Logistics Module Pressurized Section) trunnion covers on a handrail for future installation.
Tasks not completed:

Additional Details: ISS On-Orbit Status 03/18/08.

The crew's day started at 1:28 p.m. CDT. Their wake-up call came in the form of Ayaka Hirahara's 'Hoshi Tsumugi no Uta' -a Japanese song that translates to 'Song of Spinning Stars.' The song was played for Mission Specialist Takao Doi, a Japan Aerospace Exploration Agency astronaut.

The first robotic work of the day is scheduled to start at 3:43 p.m. when Mission Specialist Leopold Eyharts and International Space Station Flight Engineer Garrett Reisman will tuck away the arms of Dextre, the Special Purpose Dexterous Manipulator. That will prepare the robot for its move to its temporary home on a Destiny laboratory power and data grapple fixture, by Eyharts and Pilot Gregory H. Johnson.

Attaching Dextre to Destiny will free up the station's robotic arm, Canadarm2, which has been holding Dextre since early this morning. That will allow Johnson and Reisman to use Canadarm2 to remove the Spacelab Logistics Pallet that Dextre was assembled on from the station's truss and stow it back inside Endeavour's cargo bay for return to Earth. Canadarm2 will then be attached to the station's mobile base system so that it can be moved along the truss to its next worksite by Eyharts and Expedition 16 Commander Peggy Whitson.

Other activities for the day include resizing spacesuits by Mission Specialists Robert L. Behnken and Mike Foreman for their next spacewalk on flight day 11, and two hours of off-duty time for the shuttle crew members.

Mission Specialist Leopold Eyharts and Pilot Greg Johnson used the station's robotic arm, Canadarm2, to move Dextre to its newest position on Destiny, where it was attached to one of the lab's power and data grapple fixtures. This position clears the way for Canadarm2 to be used for future robotic missions.

Johnson and Flight Engineer Garrett Reisman then used Canadarm2 to move the Spacelab Logistics Pallet, where Dextre was assembled during the first spacewalk of the mission, from the station's truss to Endeavour's cargo bay. The pallet will return to Earth aboard the shuttle. Canadarm2 will be moved to the station's mobile base system, where it will be transported to another worksite in preparation for Thursday's fourth spacewalk.

Mission Specialists Robert L. Behnken and Mike Foreman will conduct that spacewalk, and the focus will be to test a heat shield repair technique by using a caulk-gun-like tool named the Tile Repair Ablator Dispenser (T-RAD) to dispense a material called Shuttle Tile Ablator-54 (STA-54) into purposely damaged heat shield tiles. Those test samples will be returned to Earth to undergo extensive testing on the ground.

Mission managers in Houston are considering a second attempt to install the Materials International Space Station Experiment 6, or MISSE 6, onto the Columbus module during the fifth and final spacewalk of Endeavour's mission. During yesterday's spacewalk, latching pins were unable to properly engage and secure the suitcase-sized packages used to expose experiments to the environment of space. If approved, one of the objectives of the spacewalk -the reinstallation of a spare trundle bearing assembly on the starboard Solar Alpha Rotary Joint (SARJ) -would be deferred to make room for MISSE 6.

The crew started its day at 12:28 p.m., with the song 'Enter Sandman' performed by Metallica. The song was played for Mission Specialist Robert L. Behnken.

Shuttle Commander Dominic Gorie, Pilot Gregory H. Johnson and Mission Specialist Takao Doi will start the inspection of the shuttle's heat shield at 3:03 p.m., beginning with the leading edge of the shuttle's right wing. After taking time out for lunch, they'll continue just after 6:30 p.m. with the shuttle's nose cap and left wing leading edge.

The survey's place in the mission's timeline is different than in past flights. Normally the inspection is done after the shuttle has undocked from the space station. But Endeavour's crew is planning to leave the Orbiter Boom Sensor System -or OBSS, an extension attached to the shuttle's robotic arm that includes cameras and a laser system used to look for damage to the shuttle's heat shield -behind for the next shuttle visit, and so is doing the survey earlier than usual.

The OBSS is being left on the station to leave extra room in the cargo bay of space shuttle Discovery, the next shuttle to visit the space station. Discovery will be bringing the Japanese Experiment Module to the station, and there is not enough room in the cargo bay for both it and the OBSS. Discovery will bring the OBSS back to Earth at the end of its mission.

Ahead: Week 23 of Increment 16. HAPPY EASTER! Congratulations, Shuttle & ISS crews: Five EVAs in a row, all successful. What a great Easter gift!

>>>>Today at ~7:43am EDT, the ISS, specifically its FGB module, completed 53,500 orbits of the Earth, having covered a distance of 2.25 billion kilometers (1.4 billion st.miles) in 3411 days. The 19,300 kg (42,600 lbs) Zarya ('Dawn') was launched on a Russian/Khrunichev Proton from Baikonur over nine years ago (11/20/1998) as the first element of the multi-national space station.<<<<

Additional Details: ISS On-Orbit Status 03/23/08.

Underway: Week 23 of Increment 16. (Yesterday, 3/23, was the birthday of Wernher von Braun who would have turned 96.)

ISS crew sleep/wake cycle today: Sleep 3:15am -11:45am; wake 11:45am -11:00pm.

After wakeup yesterday, FE-2-16 Reisman had his third session with the biomed experiment INTEGRATED IMMUNE (Validating Procedures for Monitoring Crew member Immune Function), collecting dry saliva samples. (INTEGRATED IMMUNE protocol requires the collection to occur first thing post-sleep, before eating, drinking and brushing teeth, and all samples are stored at ambient temperature. Along with NUTRITION (Nutritional Status Assessment), IMMUNE samples & analyzes participant's blood, urine, and saliva before, during and after flight for changes related to functions like bone metabolism, oxidative damage and immune function to develop and validate an immune monitoring strategy consistent with operational flight requirements and constraints. The strategy uses both long and short duration crewmembers as study subjects. The saliva is collected in two forms, dry and liquid. The dry samples are collected at intervals during the collection day using a specialized book that contains filter paper, all stored at ambient temperature.)

Additional Details: ISS On-Orbit Status 03/24/08.

After saying their goodbyes, the two crews closed hatches between the two vehicles at 4:49 p.m. Undocking was delayed about 30 minutes due to a sticky latch used to lock a mechanism that pivots the P6 solar array to face the sun. The latch finally engaged on the third try, safely locking the array in place for undocking.

Following undocking, Pilot Gregory H. Johnson flew the shuttle to a distance about 450 feet away from the space station and conducted a fly-around of the complex. This offered the shuttle crew a chance to view and photograph the results of their two weeks of joint work, including the installation of the Japanese Kibo logistics module and the Canadian Dextre robot.

After one and a quarter laps around the station, Johnson fired the shuttle's jets again for the final separation from the outpost at 9:08 p.m.

The shuttle crew is scheduled to begin its sleep period at 1:58 a.m. and will awaken at 9:58 a.m. to begin their final full day in orbit prior to their scheduled landing at the Kennedy Space Center just before sunset on Wednesday.

The crew's wake-up call came at 10:43 a.m. CDT today. The wake-up song was 'Furusato,' a Japanese folksong that translates to 'home' in English. The song was performed by Yuko Doi, and played for Japan Aerospace Exploration Agency astronaut Takao Doi.

Doi and the rest of the Endeavour crew will begin their farewells to the station crew members at 4:13 p.m. Once the goodbyes have been said and the hatches are closed between the two vehicles, the hooks and latches connecting the shuttle and station will release and a spring will push the shuttle away at about 6:56 p.m.

Pilot Gregory H. Johnson will then steer the shuttle to a distance about 450 feet away from the space station. At 7:21 p.m. he will begin the traditional fly-around of the station, giving the shuttle crew a bird's-eye view of the results of their labor at the station. This will be the crew's first chance to see from afar the newly installed Kibo logistics module and the Dextre robot, which is now attached to the outside of the U.S. lab, Destiny.

After completing 1.5 revolutions of the station, Johnson will fire the shuttle's jets again for the final separation from the space station at 8:39 p.m.

Commander Dominic Gorie and Pilot Gregory H. Johnson performed an orbital adjustment maneuver to provide Endeavour two landing opportunities tomorrow, with the first being just before sunset at the Kennedy Space Center. The crew also performed final tests on the shuttle's flight surfaces and reaction control system jets, which help the shuttle steer toward its landing.

The crew members in a series of in-flight interviews spoke with CNN, the Associated Press and KTVI-TV in St. Louis, Mo., and mission specialist Leo Eyharts also spoke with media representatives in France as well as the French Minister of Defense.

Endeavour has two landing opportunities tomorrow at the Kennedy Space Center. The first is at 6:05 p.m. CDT and the second is at 7:39 p.m. CDT.

The crew started its day at 9:58 a.m. CDT with the wake-up song 'Con Te Partiro,' an Italian song that translates to 'I will go with you.' The song was performed by Andrea Bocelli and played for French astronaut Leopold Eyharts.

Commander Dominic Gorie and Pilot Gregory H. Johnson will begin the shuttle's landing preparations at 12:53 p.m., by performing an orbital adjustment burn to bring Endeavour to the correct orbit for landing.

At 1:28 p.m., Gorie, Johnson and Mission Specialist Mike Foreman will begin checking the shuttle's aerosurfaces and hydraulic systems as part of the flight control systems checkout. And they'll follow that with a test of the shuttle's steering jets during the reaction control system hot fire.

Later in the day the crew members will take time out to talk to reporters. At 5:33 p.m., Eyharts will be talking with two French television stations, as well as the French Ministry of Defense. And at 7:13 p.m., the entire shuttle crew will answer questions from CNN, the Associated Press and KTVI-TV in St. Louis.

Endeavour's main gear touched down at 7:39:08 p.m. CDT with nose gear touch down at 7:39:17 p.m. Wheels stop occurred at 7:40:41 p.m.

During 249 orbits of Earth, the crew of Endeavour, which includes Commander Dominic Gorie, Pilot Gregory H. Johnson and Mission Specialists Bob Behnken, Mike Foreman, Rick Linnehan, Takao Doi and Leo Eyharts, installed the first segment of the Japanese Kibo module and the Canadian Dextre robot.

The astronauts conducted a record five spacewalks during the mission, which was also the longest mission to date at the International Space Station. The crew also installed the MISSE-6 experiment to the outside of the Columbus laboratory and also tested out a new shuttle heat shield tile repair technique.

Endeavour delivered astronaut Garrett Reisman to the station, replacing Eyharts as a flight engineer aboard the complex. Eyharts spent 48 days in space, including 44 aboard the station after he arrived on shuttle Atlantis during the STS-122 mission in February.

Endeavour will be towed to its orbiter processing facility tonight, where it will begin preparations for its next mission. The crew of Endeavour is planned to return to the Johnson Space Center tomorrow at 4 p.m. CDT.

On what is scheduled to be its last day in space, the crew was awakened at 9:58 a.m. CDT by Train's "Drops of Jupiter." The song was played for Pilot Gregory H. Johnson.

Deorbit preparations will begin at 1:58 p.m. Then the crew members will ready their seats and should get the okay to close the payload bay doors at 2:18 p.m. If the good weather forecast proves true, Commander Dominic Gorie will conduct the deorbit burn at 4:58 p.m., slowing Endeavour enough to allow it to drop out of orbit and begin its descent. Landing at the Kennedy Space Center's Shuttle Landing Facility is scheduled for 6:05 p.m., about half an hour before sunset.

Endeavour has one other opportunity to land today if needed. The second opportunity would get the astronauts to Florida about one hour after sunset. The deorbit burn would occur at 6:33 p.m. for a 7:39 p.m. landing. Either landing would secure for Endeavour the record for longest shuttle mission to the station.

While at the station, the crew delivered 25,839 pounds of equipment, hardware, supplies and consumables. The new Japanese Experiment Logistics Module, Pressurized Section -the first part of the Japan Aerospace Exploration Agency module, Kibo -accounts for the bulk of that at 18,377 pounds. In all, 23,776 pounds of equipment and hardware made its way from the shuttle's cargo bay to the station.

From the shuttle's middeck came 1,432 pounds of transfer and resupply items. And the station also got 608 pounds of water and 23 pounds of nitrogen before Endeavour left.