Tianhui 2 [CAST]
TH 2 (Tianhui-2 = "Sky drawing") is a Chinese series of earth observation satellites. The TH-2 satellite system is China’s first microwave surveying satellite system based on interferometric synthetic aperture radartechnology, and is also China’s first close range formation satellite system.
The system works in the X-band, with the resolution of 3 m and a solar synchronous orbit of 500 km. It is composed of two identical satellites. It adopts a technical system of satellite formation in differen torbits and a bistatic radar transceiver mode. It can measure the global digital surface models and acquire radar orthophotos in a short time.
The first group of two satellites was launched on 29 April 2019 on a CZ-4B rocket from Taiyuan. A second group was launched on 18 August 2021.
|Type / Application:||Earth observation (SAR)|
|Power:||solar arrays, batteries|
|Orbit:||506 km × 517 km, 97.4°|
|Tianhui 2-01A (TH 2-01A)||2019-024A||29.04.2019||TY LC-9||CZ-4B||with Tianhui 2-01B|
|Tianhui 2-01B (TH 2-01B)||2019-024C||29.04.2019||TY LC-9||CZ-4B||with Tianhui 2-01A|
|Tianhui 2-02A (TH 2-02A)||2021-074A||18.08.2021||TY LC-9||CZ-4B||with Tianhui 2-02B|
|Tianhui 2-02B (TH 2-02B)||2021-074B||18.08.2021||TY LC-9||CZ-4B||with Tianhui 2-02A|