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USERS (Unmanned Space Experiment Recovery System) is a Japanese microgravity experiment satellite that was launched by an H 2A rocket from Tanegashima Island in Japan at 08:20 UT on 10 September 2002. The 1.7 tonne (with fuel), 700 W satellite consists of a Re-Entry Module (REM) and a Service Module (SEM) that will provide power and a communications link to the REM. In turn, REM consists of a Re-Entry Vehicle (REV) and a Propulsion Module (PM). After 8.5 months in orbit, REM will be separated to deorbit and the REV will soft-land with its contents. The SEM will be elevated to a higher orbit.

Alternate Names

  • 27515
  • Unmanned Space Experiment Recovery System

Facts in Brief

Launch Date: 2002-09-10
Launch Vehicle: H-2A
Launch Site: Tanegashima, Japan

Funding Agency

  • Unknown (Japan)


  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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