Tianhui 1, also known as “Mapping Satellite 1” in its English name, was designed for military survey and mapping roles. The satellite was designed and built by the China Spacesat Co. Ltd., a commercial branch of the China Academy of Space Technology (CAST). The first satellite was launched from the Jiuquan Satellite Launch Centre (JSLC) on a CZ-2D launcher on 24 August 2010, followed by a second satellite on 6 May 2012.
The development of the satellite began in 2005, funded by the State Bureau of Surveying and Mapping (SBSM) of the Chinese government. The onboard mission payload was developed by the Changchun Institute of Optics, Fine Machinery and Physics (CIOMP) of the China Academy of Science.
The satellite operated on a 500km Low-Earth Orbit (LEO). The onboard CCD camera had a spatial resolution of 5 metres. The onboard multispectral scanner operated in four spectral bands, with 10m spatial resolution and 60km ground swath.
- Tianhui 1-01 - Role: Mapping / survey. Programme: Tianhui. Contractor: China SpaceSat/CAST. Operator: PLA. Apogee: 511km. Perigee: 495km. Inclination: 97.4°. Period: 94.5 min.
- Tianhui 1-02 - Role: Mapping / survey. Programme: Tianhui. Contractor: China SpaceSat/CAST. Operator: PLA. Apogee: 504km. Perigee: 487km. Inclination: 97.35°. Period: 94.53 min.
Last updated: 8 May 2012