Soyuz TM-31

Soyuz TM-31
NASA · Public domain · source
Name	Soyuz TM-31
Mission type	Crewed transport to International Space Station
Operator	Rosaviakosmos
Cospar id	2000-037A
Satcat	26407
Spacecraft type	Soyuz-TM
Manufacturer	RKK Energia
Launch mass	7200 kg
Launch date	2000-10-31 UTC
Launch rocket	Soyuz-FG
Launch site	Baikonur Cosmodrome
Landing date	2001-03-18 UTC
Landing site	Kazakhstan
Crew callsign	"Antey"

Soyuz TM-31 was the crewed spacecraft that conducted the first operational crewed transport to the International Space Station during Expedition 1. Launched from Baikonur Cosmodrome on 31 October 2000, the mission delivered a multinational crew who established continuous human presence aboard the Zarya and Unity complex. The flight marked a transition from assembly flights such as STS-88 and STS-92 to long-duration habitation managed by Rosaviakosmos and international partners including NASA, ESA, and CSA.

Mission overview

The mission served as the inaugural long-duration increment of the International Space Station program, initiating continuous occupancy that followed intermittent expeditions like the Mir EO-33 visits and assembly missions including STS-96. Soyuz TM-31's launch represented coordination among RKK Energia, Glavkosmos, Gagarin Cosmonaut Training Center, and mission control centers in Moscow, Houston, and Tsukuba. Objectives included crew transfer, activation of life support systems in the Zvezda service module, and handover procedures for logistics previously supported by Progress resupply vehicles and Space Shuttle flights.

Crew

The three-person international crew combined experience from long-duration expeditions and shuttle missions. Commander Yuri Gidzenko brought former Mir flight experience; Flight Engineer Sergei Krikalev had previous service on Mir EO-18 and later on STS-88; NASA astronaut William Shepherd arrived with Expedition 1 responsibilities after assignments linked to STS-27 training and Johnson Space Center. Crew composition highlighted collaboration between Rosaviakosmos and NASA under agreements negotiated alongside partners such as European Space Agency and Canadian Space Agency.

Spacecraft and launch

Soyuz TM-31 used the Soyuz-TM design developed by RKK Energia and launched on a Soyuz-FG from Launch Complex 1 at Baikonur Cosmodrome. The vehicle integrated a descent module, orbital module, and service module derived from heritage designs tested during Soyuz TM-20, Soyuz TM-23, and Soyuz TM-26 flights supporting Mir. Prelaunch processing occurred in coordination with the TsUP flight control center and engineers from Khrunichev State Research and Production Space Center, following checkout procedures similar to those for Progress M1 and Proton launches. Launch profiles matched orbital insertion parameters used in rendezvous missions such as Soyuz TM-25.

Docking and station operations

After orbital insertion, the spacecraft executed a multi-day rendezvous culminating in docking with the Zvezda aft port of the Zarya module and the pressurized mating to the existing Unity node configuration. Docking procedures mirrored techniques practiced during Soyuz TM-28 and were coordinated with station systems installed during shuttle missions like STS-88 and STS-92. Onboard operations emphasized activation of life support from Zvezda, checkout of the Canadarm2 interfaces installed by later shuttle flights, and integration with power systems from the S0 truss components delivered by Space Shuttle logistics flights. Crew activities included science payload management tied to experiments supported by NASA, ESA, and JAXA investigators and stowage transfers from Progress cargo modules.

Mission timeline

Launch occurred on 31 October 2000, followed by orbital rendezvous phases comparable to those of Soyuz TM-26. Docking operations completed within days, with the crew commencing Expedition 1 and performing handover procedures for station systems installed during STS-88. Over the following months, the crew executed maintenance tasks, life support activations pioneered on Mir EO-24 expeditions, and hosted visiting crewmembers from shuttle flights such as STS-101 that delivered supplies and equipment. Resupply linkages with Progress M1-3 and docking adaptations tested interfaces previously used during the Mir–Shuttle program.

Crew return and aftermath

The return of the crew used the descent module to land on the steppes of Kazakhstan on 18 March 2001, following procedures refined during Soyuz TM-30 and Soyuz TM-21 recoveries. The successful handover established continuous human presence on the International Space Station, shaping subsequent expeditions such as Expedition 2 and enabling expanded international research partnerships with ESA, CSA, JAXA, and commercial stakeholders like SpaceX in later decades. The mission informed upgrades to Soyuz-TMA and successor vehicles developed by RKK Energia under evolving coordination with Roscosmos and partner agencies.

Category:Soyuz missions Category:Spacecraft launched in 2000 Category:International Space Station expeditions