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ROCSAT-1 is Taiwan's first experimental scientific satellite. It was launched from Cape Canaveral on January 27, 1999 by an Athena 1 into a circular orbit at 600 km altitude and 35 degree orbit inclination. The nodal precession makes the spacecraft drift around the Earth every 52 days. The payload included three instruments: the Ocean Color Imager (OCI), the Experimental Communication Payload (ECP) and the Ionospheric Plasma and Electrodynamics Instrument (IPEI). The ROCSAT-1 mission officially ended on June 16, 2004. The OCI homepage is at

and the IPEI homepage at

Alternate Names

  • Republic of China Satellite-1
  • 25616
  • Formosat-1

Facts in Brief

Launch Date: 1999-01-27
Launch Vehicle: Athena 1
Launch Site: Cape Canaveral, United States
Mass: 401 kg
Nominal Power: 450 W

Funding Agency

  • National Central University, Taiwan (Taiwan)


  • Space Physics
  • Engineering
  • Earth Science

Additional Information

Questions and comments about this spacecraft can be directed to: Dr. Dieter K. Bilitza



NameRoleOriginal AffiliationE-mail
Dr. Shin-Yi SuGeneral ContactNational Central University,

Selected References

  • Su, S.-Y., The Taiwanese ROCSAT-1 satellite, STEP International, 4, No. 10, 1-2, Oct. 1994.
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