Manufacturer's Designation: DOS 17KS-12701. Part of: Mir complex. Class: Manned. Type: Space Station. Destination: Space Station Orbit. Nation: Russia. Agency: MOM. Manufacturer: Korolev. Improved model of the Salyut DOS-17K space station with one aft docking port and five ports in a spherical compartment at the forward end of the station. Mir lasted 15 years, the complex in the end consisting of 7 modules with 11.5 metric tons of scientific equipment. It cost $220 to $240 million per year to keep in operation. The design of an improved model of the Salyut DOS-17K space station was authorized as part of the third generation of Soviet space systems in a 17 February 1976 decree. At that time it was planned that the two stations (DOS-7 and DOS-8) would be equipped with two docking ports at either end of the station and an additional two ports at the sides of the forward small diameter compartment. By the time of the draft project in August 1978 this had evolved to the final Mir configuration of one aft port and five ports in a spherical compartment at the forward end of the station. Up to that time it was planned that the ports would provide docking positions for 7 metric ton modules derived from the Soyuz spacecraft. These would use the Soyuz propulsion module, as in Soyuz and Progress, but would be equipped with long laboratory modules in place of the descent module and orbital module.
Following the decision to cancel Chelomei's manned Almaz military space station program, a resolution of February 1979 consolidated the programs, with the docking ports to be reinforced to accommodate 20 metric ton space station modules based on Chelomei's TKS manned ferry spacecraft. NPO Energia was made responsible for the overall space station, but subcontracted the work to KB Salyut due to the press of in-house work on Energia, Salyut 7, Soyuz-T, and Progress. The subcontractor began work in the summer of 1979, with drawings being released in 1982-1983. New systems incorporated into the station included the Salyut 5B digital flight control computer and gyrodyne flywheels (taken from Almaz), and the new Kurs automatic rendezvous system, Altair satellite communications system, Elektron oxygen generators, and Vozdukh carbon dioxide scrubbers.
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Mir against Space The Mir station seen against space during one of the Shuttle-Mir missions.... Credit- NASA
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By early 1984 all work on Mir ground to a halt as all resources were put on getting the Buran space shuttle into flight test. This changed in the spring 1984 when Glushko was called into the office of the Central Committee's Secretary for Space and Defense and ordered to orbit Mir by the 27th Communist Party Congress in the spring of 1986. By the end of 1984 the static and dynamic test models of the station had been completed. The ground test model of the station was delivered in December 1984. The use of this full-fidelity test article, an approach taken on the Almaz program, was new to the civilian DOS project.
A major problem was that the station ended up one metric ton heavier than designed due to the final weight of the electrical cabling Even after removing most of the experimental equipment (it would have to be delivered to the station later by ferry craft) it still exceeded the performance of the Proton booster to the planned 65 degree inclination orbit. The decision was finally taken in January 1985 to use the same 51.6 degree orbit as Salyut, although this would reduce photographic coverage of the Soviet Union. Meanwhile problems with development of the new software for the Salyut 5B computer lead to the decision to launch Mir with the old analogue Argon computer from Salyut DOS-17K. The digital computer would have to be installed later in orbit.
By April 1985 it was clear that the planned processing flow could not be followed and still make the spring 1986 launch date. The decision was taken on Cosmonautics Day (April 12) to ship the flight model to Baikonur and conduct the systems testing and integration there. Mir arrived at the launch site on 6 May 1985. 1100 of 2500 cables required rework based on results of testing of the ground test model at Khrunichev. In October 1985 Mir was rolled outside of its clean room to conduct communications tests of the Altair system with the Cosmos 1700 satellite already in orbit.
The first launch attempt on 16 February 1996 at very low temperatures was scrubbed when the spacecraft communications failed. The second attempt on 20 February was successful. The political deadline had been met.
The early launch of Mir left the planners without Soyuz spacecraft or modules to launch to it. The decision was taken to launch Soyuz T-15 on a unique dual station mission. The Soyuz would first dock with Salyut 7, which was dead in space, and completely repair the station. They then would fly in their Soyuz to Mir, and put it into initial operation. This spectacular mission marked a new maturity in the Soviet space program.
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Mir 1997
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Spacecraft Description
The Mir base block was the backbone of the Mir space station. It was the principal space station control element and contained the main computers, communications equipment, kitchen and hygiene facilities, and primary living quarters. The module provided 90 cubic meters of habitable volume. The base block included six docking ports used as permanent attachment points for the other station modules and for temporary docking of manned and unmanned resupply ships.
Mir was equipped with its own orbital maneuvering engines. These could not be used after the arrival of Kvant (the first station module), but the base block still provided the principal propellant storage tanks and primary attitude control for the entire space station.
The base block was divided into four compartments, designated as the working, transfer, intermediate and assembly compartments. All but the assembly compartment were pressurized. A small airlock was also available for experiments or for the release of small satellites or refuse.
- Working Compartment (7.67 m long x 4.2 m diameter): The working compartment was the main habitable volume on Mir and consisted of two cylinders connected by a tapered conical section. The interior of the working compartment was divided into an operations zone and a living area. The operations zone occupied the smaller diameter section and was the control area for the entire Mir complex. Monitoring and command of the base block systems, scientific equipment and mechanisms were carried out in this area. The living area of the working compartment contained the galley, individual crew cabins, hygiene facilities and trash storage. Medical monitoring equipment and a bicycle ergometer were located in the conical portion of the working compartment. Spatial orientations of 'floor' and 'ceiling' were provided by dark green carpet on the 'floor', light green walls, and a white 'ceiling' with florescent lamps. The arrangement of equipment and the interior finish of the working compartment were designed to reinforce this orientation. The living area used the same spatial orientation concepts, but soft pastel colors were used to imply a home-like atmosphere.
- Transfer Compartment (2.2 m diameter X 2.84 m long): The spherical transfer compartment was located at the forward end of the working compartment. It provided four radial docking ports, spaced at 90 degree angles, for additional station modules. A fifth axial docking port at the front of the station was dedicated to use by visiting transport spacecraft
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Mir Mir base block....
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- Intermediate Compartment: The intermediate compartment was a 2 meter diameter pressurized tunnel that connected the working compartment to the aft docking port. The tunnel was located in the centre of the non-pressurized assembly compartment. The aft docking port was used for visiting transport vehicles until permanently occupied by the Kvant module (transports thereafter docked with aft port of Kvant).
- Assembly Compartment. Main engine and fuel tanks were located in the annular non-pressurized assembly compartment. Externally, this assembly supported the station's satellite relay antenna, docking radar antennas, lights and optical sensors.
Spacecraft systems
Power to the base block was initially provided by 2 x 38 sq. meter arrays providing 9 kW. A third array was added to the base block in 1987 to bring total power to 10.1 kW. Additional power from visiting Progress-M and Soyuz-TM vehicles and other station modules added to the station's total supply as it grew. The arrays charged 12 NiCd batteries. The base block was equipped with an integrated refuelable pressure-fed propulsion system consisting of 32 x 137 N attitude control thrusters and 2 x 2.9 kN thrusters for orbital maneuver. The system used N2O4/UDMH hypergolic propellants.
The life support system maintained the station's environment at 18-28 degrees. C and 20-70 percent humidity. The Vozdukh electrolytic system was used to recycle station atmosphere with a backup chemical scrubbing system. Station pointing could be controlled to within 15 arc-min.
Two primary flight control computers provide most station control functions. Star sensors, infrared Earth horizon sensors, sun sensors, magnetometers, gyros, and accelerometers were used for attitude determination. Communication with the ground was via 11-14 GHz links either directly to ground stations or through Luch geosynchronous relay satellites. Rendezvous and docking was conducted automatically by transport spacecraft through use of the Kurs system transponders located at each docking port Mir.
Equipment originally delivered with the base block included: - Splav-2 crystal growth facility - Zona zone melt facility - Kashtan electrophoresis unit - Bulgarian Rozhen photometer - Spektr-256 and MKS-M spectrometers - Pion-M multipurpose physics unit (41 kg) - Biryuza semiconductor materials unit Ruchei electrophoresis installation - Yantar metal coating equipment - Mariye magnetic spectrometer - Korund furnace (136 kg).
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Mir simulator Mir simulator at the Yuri Gagarin Cosmonaut Training Centre... Credit- © Mark Wade
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An extensive suite of Earth observation instruments was operational on the Mir space station. Although only a pair of devices were carried abroad Mir at its launch in 1986, sixteen major systems were deployed to the Mir core module or the Kvant 2 and Kristal auxiliary modules:
Mir Core Module:
- EFO-1 electronic photometer for studies of atmospheric aerosols and dust
- Haselblad camera
- KATE-140 topographic camera (50-m resolution)
- MKS-M multi-band spectrometer (0.4-0.9 micrometers
- Spektr-256 multi-band spectrometer (256 channels in visible and infrared)
- Terra impulse photometer for the study of atmospheric optical emissions
Kvant 2 Module:
- AFM-2 for study of the atmosphere and pollutants
- Gamma 2 video spectropolarimeter
- ITS-7D spectrometer
- KAP-350 topographic camera
- MKF-GMA multi-spectral camera (0.5-0.9 micrometer, 10-15 m resolution)
- MKS-M2 multi-band spectrometer
Kristal Module:
- Priroda 5 multi-purpose high resolution (5 m) camera
Plans call for the launch in late 1995 of the Priroda (Nature) auxiliary module to augment substantially the Earth observation capabilities of the Mir space station.
The Mir space station was also equipped with a wide assortment of electric furnaces and other devices and with the added benefit of crew participation. One of the primary objectives of the Kristal module, attached to Mir in 1990, was to support microgravity experiments. Despite the fact that microgravity conditions were typically 10-100 times worse on a manned versus an unmanned spacecraft, man-tended experiments on Soviet-built space stations, some lasting more than a week, proved to be quite successful. The other principal drawback of materials science research on Mir was the extremely limited capability of returning samples to Earth. This was ameliorated in late November, 1990, when the Progress M recoverable capsule was successfully tested for the first time. This system was used approximately twice each year, returning up to 150 kg of cargo (including the product of materials science research) per mission.
In 1987 three electric furnaces were delivered to Mir: Korund-1M, Kristallizator, and Mirror-Beam. These were augmented or superseded in 1990 by the five new furnaces installed on the Kristal module: Krater V, Kristallizator, Optizon, Zona 2, and Zona 3. Other Mir materials science devices were used for electrophoresis (Aynur-Kristall, EFU Robot, Ruchey, and Svetlana), protein crystallization (Aynur-Mir), and miscellaneous experiments (Biostoykost, Svetoblok, and Yantar). Most materials science experiments were of Russian origin, but some were created by Ukrainian specialists.
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Mir View of Mir in space.... Credit- NASA
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Crew Size: 12. Typical orbit: 387 km x 395 km at 52 degrees inclination. Length: 13.13 m (43.07 ft). Span: 29.73 m (97.53 ft). Mass: 21,000 kg (46,000 lb). RCS Coarse No x Thrust: 32 x 135 N. RCS Fine No x Thrust: Gyrodyne reaction wheels. Main Engine: KRD-79. Main Engine Thrust: 5.880 kN (1,322 lbf). Main Engine Propellants: N2O4/UDMH. Main Engine Propellants: 1,200 kg (2,600 lb). Main Engine Isp: 305 sec. Electrical System: Solar panels 29.73 m span, area: 76 sq. m. Electric System: 2.50 average kW. Associated Launch Vehicle: Proton 8K82K. Mir Chronology - 1976 February 17 - Energia; Buran; Mir; Luch; Potok approved; N1 formally cancelled. - Launch Vehicle: Energia, N1.
Central Committee of the Communist Party and Council of Soviet Ministers Decree 'On work on Energia-Buran, DOS-7K nos. 7 and 8, Gamma. Geyzer (Potok), and Altair (Luch) and cancellation of the N1' was issued. The design of an improved model of the Salyut DOS-17K space station was authorised as part of the third generation of Soviet space systems in a decree. At that time it was planned that the two stations (DOS-7 and DOS-8) would be equipped with two docking ports at either end of the station and an additional two ports at the sides of the forward small diameter compartment. Luch and Potok were elements of the second generation global command and control system (GKKRS) deployed in the first half of the 1980's. Luch satellites, analogous to the US TDRS, provided communications service to the Mir space station, Buran space shuttle, Soyuz-TM spacecraft, military satellites, and the TsUPK ground control center. They also served to provide mobile fleet communications for the Soviet Navy.Additional Details: Energia; Buran; Mir; Luch; Potok approved; N1 formally cancelled. (22882).
- 1978 August 1 - Mir draft project completed - Program: Mir.
By this time Mir had evolved to the final configuration of one aft port and five ports in a spherical compartment at the forward end of the station. It was planned that the ports would provide docking positions for 7 tonne modules derived from the Soyuz spacecraft. These would use the Soyuz propulsion module, as in Soyuz and Progress, but would be equipped with long laboratory modules in place of the descent module and orbital module.
- 1979 February 1 - Almaz cancelled and consolidated with Mir -
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Shuttle/Mir 1993 ISS Phase One Shuttle/Mir. The US Space Shuttle docks with Russia's "Mir" space station.... Credit- NASA via Marcus Lindroos
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Following the decision to cancel Chelomei's manned Almaz military space station programme, a resolution consolidated the programs, with the Mir docking ports to be reinforced to accommodate 20 tonne space station modules based on Chelomei's TKS manned ferry spacecraft. NPO Energia was made responsible for the overall space station, but subcontracted the work to KB Salyut due to the press of in-house work on Energia, Salyut 7, Soyuz-T, and Progress. The subcontractor began work in the summer of 1979.
- 1982 January 1 - Mir drawing release -
Drawings were released in 1982-1983. New systems incorporated into the station included the Salyut 5B digital flight control computer and gyrodyne flywheels (taken from Almaz), and the new Kurs automatic rendezvous system, Altair satellite communications system, Elektron oxygen generators, and Vozdukh carbon dioxide scrubbers.
- 1984 December 1 - Ground test articles of Mir completed -
By the end of 1984 the static and dynamic test models of the station had been completed. The ground test model of the station was delivered in December 1984. The use of this full-fidelity test article, an approach taken on the Almaz program, was new to the civilian DOS project.
- 1986 February 19 - Mir - Program: Mir. Launch Site: Baikonur. Launch Vehicle: Proton. Mass: 20,100 kg (44,300 lb). Perigee: 387 km (240 mi). Apogee: 395 km (245 mi). Inclination: 51.60 deg. Period: 92.40 min.
The core module of Russia's new space station was placed in an initial orbit of 172 x 301 km. It was established in its operational orbit on 6 March. It passed just 10 km from Salyut 7 on 8 March. First use of the geosynchronous Luch relay sattelite for communications with the station was on 29 March. Equipment launched with the core module included:
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Mir Complex Cutaway Cutaway drawing of the Mir space station....
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- Splav-2 crystal growth facility
- Zona zone melt facility
- Kashtan electrophoresis unit
- Bulgarian Rozhen photometer
- Spektr-256 and MKS-M spectrometers
- Pion-M multipurpose physics unit (41 kg)
- Biryuza semiconductor materials unit
- -Ruchei electrophoresis installation
- Yantar metal coating equipment
- Mariye magnetic spectrometer
- Korund furnace (136 kg)
Total costs of Mir from February 1986 through return of Soyuz TM-9 in April 1989 were given as 1.471 billion rubles. This sum ncluded Mir, Kvant, all Soyuz and Progress spacecraft, and 2 new modules. As of April 1989 50% of the scientific equipment was inoperable and the interior was cramped due to lack of extension modules. Electric power supply problems were first reported in April 1989 (batteries would not hold charge from panels). Mass 27,300 kg as of January 1990. Complex mass with Kvant-2 65,790 kg; with Kristall, Soyuz TM, and Progress M, 89,990 kg.Additional Details: Mir (3425).
- 1992 January 1 - Work on military Spektr version cancelled -
The original Spektr design was to be armed with Oktava interceptor rockets and equipped with sensors to identify and track ballistic missile re-entry vehicles as well as discriminate decoys. In 1992, as directed by the Soviet Union's military and political leadership, all work on such projects was discontinued. The Spektr module was mothballed, then later converted into a civilian platform, partially funded by the United States.
- 1993 May 1 - Mir-Shuttle Docking Module proposed -
In discussions regarding docking the US Shuttle with the Mir space station, NASA expressed concern about the clearances between the Shuttle and Mir's solar panels when using the docking port designed for Buran on the Kristall module. The Russians thought NASA overly cautious, but NPO Energia offered a solution - a modified version of the Buran SO, to be delivered by the Shuttle. The specialised SO docking module was originally designed for docking the Buran space shuttle with the Mir-2 space station. In the 1992 concept the module would be delivered by a Progress-M tug to Mir-2 and included a lateral EVA hatch.
- 1994 April 1 - Mir-Shuttle Docking Module Mock-up delivered to NASA -
- 1994 January 1 - Mir-Shuttle Docking Module design approved. -
The simplified SO design deleted the lateral airlock. Qualification was relatively straightforward since the basic structure of the Soyuz BO orbital module was used, and the APDS androgynous docking port installation had already been proven on Soyuz-TM16. The draft project was completed in December 1993.
- 2000 May 12 - EVA Mir EO-28-1 - Program: Mir. Crew: Kaleri, Zalyotin. Flight: Mir EO-28.
The cosmonauts entered open space via the air-lock of Kvant-2 at 10:44 GMT. The Germatizator experiment, the use of a special glue to seal off cracks on the outside surface of the complex, was executed according to plan. An inspection of a malfunctioning solar panel on Kvant-1showed that the steering cable to the rotor was burnt through due to a short-circuit and was beyond repair. The cosmonauts dismantled an experimental lightweight solar battery from the outer surface of the SO docking compartment. The last activity was the panorama-inspection, making images of the outside of the complex to enable specialist to analyse the effects of ageing of the material. The hatch was closed on what might have been the last spacewalk on Mir at 15:36 GMT.
- 2001 March 23 - Mir deorbited - Program: Mir.
On March 19, 2001 Mir was in a 224 x 230 km x 51.6 deg orbit. On March 23 at 0033 GMT Progress M1-5 carried out the first small DPO burn to lower Mir's orbit from 212 x 218 km to 190 x 219 km. A second small burn began at 0201 GMT and put Mir in a 150 x 215 km orbit. The main deorbit burn began at 0507 GMT, lowering perigee to less than 80 km. At 0550 GMT observers in Fiji reported seeing multiple bright reentry bodies passing overhead, confirming that the station had broken up by that time. The impact zone was around 160 W 40 S.
Bibliography and Further Reading - Siddiqi, Asif A, The Soviet Space Race With Apollo, University Press of Florida, 2003. ISBN: 0813026288. The definitive history of the Soviet manned space program in the 1960's to the early 1970's. Originally published as the the latter part of 'Challenge to Apollo' by NASA in 2000 as NASA SP-2000-4408. More at amazon.com...
- Hendrickx, Bart, Journal of the British Interplanetary Society, "The Origins and Evolution of Mir and Its Modules", Vol. 51, P. 203-222, 1998..
- Wilson, Keith T., Spaceflight, "EVA Log 1965-1997", 1998, Volume 40, page 85.
- Kaesmann, Ferdinand, et. al., Journal of the British Interplanetary Society, "Proton - Development of A Russian Launch Vehicle", 1998, Volume 51, page 3.
- Matson, Dr Wayne R, Editor, Cosmonautics - A Colorful History, Cosmos Books, Washington DC, 1994. ISBN: 1885609019. Handsome picture book on Soviet manned spaceflight - no longer available. The author skipped town, leaving a lot of folks who ordered expensive space tours and books from him holding the bag.... More at amazon.com...
- McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 60,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.
- Vladimirov, A, Novosti kosmonavtiki, "Tablitsa zapuskov RN 'Proton' i 'Proton K'", 1998, Issue 10, page 25.
- Portree, David S. F., Mir Hardware Heritage, NASA Reference Publication 1357, March 1995. Excellent overview, needing some updating in line with more recent revelations on Soviet programs. Considered the NASA ISS team Bible on Russian space hardware.
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© Mark Wade, 1997 - 2008 except where otherwise noted.
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