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Operator National Space Organization
Mission type Science
Launch date Jan 27, 1999
Launch vehicle ATHENA-1/LMLV1
Mission duration 5.5 years
Satellite of Earth
Orbital decay Jun 17, 2004
Homepage Formosat-1
Mass 401 kg
Orbital elements
Inclination 35°
Orbital period 96.7 mins

Formosat-1 (福爾摩沙衛星一號, formerly known as ROCSAT-1) is an Earth observation satellite operated by the National Space Program Office (NSPO, now the National Space Organization) of the Republic of China (Taiwan) to conduct observations of the ionosphere and oceans. The spacecraft and its instrumentation were developed jointly by NSPO and TRW using TRW's Lightsat bus, and was launched from Cape Canaveral Air Force Station, US, by Lockheed Martin on January 27, 1999.

FormoSat-1 provided 5½ years of operational service. The spacecraft ended its mission on June 17, 2004 and was decommissioned on July 16, 2004.[1]

Technical details


  • Weight: 401 kg
  • Shape: Hexagonal
  • Dimensions
    • Height: 2.1 m
    • Diameter: 1.1 m
  • Solar arrays: Two, 1.16 x 2.46 m
  • Electrical power: 450 watts


  • Experimental Communication Payload (ECP)
  • Ionosphere Plasma Electrodynamics Instrument (IPEI)
  • Ocean Color Imager (OCI)


  • Altitude: 600 km
  • Type: Circular
  • Inclination: 35 degrees

See also


  1. ^ L. Wu, S.-S. Chen, J. Ju-Chen Yaung,, “Space Program in Taiwan,” Proceedings of ASC (Asian Space Conference), Chiang Mai, Thailand, Nov. 22-26, 2004

External links

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