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Tianhui 2-01, 2-02 (TH 2-01, 2-02)

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.

Nation: China
Type / Application: Earth observation (SAR)
Power: solar arrays, batteries
Orbit: 506 km × 517 km, 97.4°
Satellite COSPAR Date LS Launch Vehicle Remarks
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


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