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TMSAT was a microsatellite built for the Thai Microsatellite Company. It was similar in appearance to earlier ones in the series and carried Earth Imaging and digital communications and GPS orbit determination experiments. It was launched from the Baikonur cosmodrome aboard a Zenit rocket into a 821 km sun-synchronous (21h37m) orbit. It has returned many multi-spectral images of approximately 90m ground sampling distance, in three spectral bands.

Alternate Names

  • 25396
  • Thai Microsatellite
  • OSCAR 31

Facts in Brief

Launch Date: 1998-07-10
Launch Vehicle: Zenit 2
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan
Mass: 55 kg

Funding Agency

  • Thai Microsatellite Company, Thailand (Thailand)


  • Communications
  • Earth Science

Additional Information

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

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