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HJ 1C (Huan Jing = Environment) is a small chinese radar Earth observation satellite operated by the China Centre for Resources Satellite Data and Application (CRESDA). The satellite constellation is composed of a number of small satellites, the ground system, and the application system. It provides all-weather (3 to 100 m meter) imagery. The Huan Jing constellation consists of two small optical satellites, the HJ-1A and the HJ-1B, and one radar satellite, the HJ-1C.

HJ 1C uses a S-band SAR for imaging.

Reportedly the satellite suffered from an antenna problem, which caused a lower than planned resolution. As a remedy, the orbit was lowered.

Nation: China
Type / Application: Earth observation, radar
Operator: CRESDA
Contractors: DFH Satellite Co. Ltd of CAST
Configuration: CAST968B Bus
Power: 2 deployable solar arrays, batteries
Orbit: 488 km × 502 km, 97.3
Satellite COSPAR Date LS Launch Vehicle Remarks
HJ 1C 2012-064A 18.11.2012 TY LC-9 CZ-2C (3) with XY 1, FN 1, FN 1A


  • CAST Website
Further HJ missions:

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