| Tianhui I-02 | |
| Mission Type: | Earth observation |
| Operator: | CASC |
| Cospar Id: | 2012-020A |
| Satcat: | 38256 |
| Launch Date: | UTC |
| Launch Rocket: | Chang Zheng 2D |
| Launch Site: | Jiuquan LA-4/SLS-2 |
| Orbit Epoch: | 6 May 2012[1] |
| Orbit Reference: | Geocentric |
| Orbit Regime: | Low Earth |
| Orbit Periapsis: | [2] [3] |
| Orbit Inclination: | 97.35 degrees |
| Orbit Period: | 94.57 minutes |
| Apsis: | gee |
Tian Hui-1 (also known as Mapping Satellite I) is a Chinese Earth observation satellite built by Dong Feng Hong, a China Aerospace Science and Technology Corporation (CASC).Tian Hui-1 was launched on 6 May 2012 at 9:10 UTC on a Long March 2D rocket into a Sun-synchronous, polar orbit with an perigee of 490km (300miles) and apogee of 505km (314miles).[4]
According to the Chinese Ministry of Defense the new satellite carries scientific experiments and is to be used for the evaluation of ground resources and mapping.[5]
Tian Hui 1 is equipped with two different camera systems in the visible and infrared range. The visible light camera is able to produce three-dimensional pictures in the spectral region between 510 and 690 nanometers with a dissolution of approximately 5 meters and a field of view of approximately 25 degrees. The infrared camera reaches a dissolution of approximately 10 meters and covers four wavelengths (430 - 520 Nm, 520 - 610 Nm, 610 - 690 Nm and 760 - 900 Nm).[5]