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UoSAT 12 was launched from the Baikonur cosmodrome by ISC Kosmotras aboard the first orbital demonstration launch of the SS-18 Dnepr vehicle. Surrey Satellite Technology Ltd (SSTL) built the satellite to validate key minisatellite bus and payload technologies. The mission enabled SSTL to offer flight-proven minisatellite solutions for commercial, scientific, military and know-how transfer programs. UoSAT 12 carried payloads for multi-spectral and panchromatic Earth imaging; experimental S-band/L-band communications; and operational VHF / UHF store-and-forward messaging. In addition to these payloads, UoSAT 12 demonstrated Surrey's new minisatellite bus subsystems, including GPS orbit and attitude determination; cold-gas orbit and attitude control; nitrous oxide resistojet orbit control; star imagers; reaction wheels; Ethernet LAN; and 28-V power system.

Alternate Names

  • OSCAR 36
  • 25693

Facts in Brief

Launch Date: 1999-04-21
Launch Vehicle: Dnepr
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan
Mass: 325.0 kg

Funding Agency

  • Unknown (United Kingdom)


  • Communications

Additional Information

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

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