Science
TIANHUI 2-02B
Chinese Military SAR/Optical Stereo Mapping (Paired) · CAST / PLA Navigation and Survey Bureau
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The companion to Tianhui 2-02A, completing the second Tianhui-2 interferometric SAR mapping formation. Flying in precise formation with its partner, this satellite pair enables China to continuously refresh its 3D elevation models of strategically significant terrain — border regions, contested territories, and areas of military interest — without waiting for clear weather windows that optical satellites require.
Its orbit
- Orbit
- Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
- Altitude
- 322–324 mi (518–521 km)
- Inclination
- 97.5°
- One orbit
- 94.9 minutes15.2 orbits a day
- NORAD ID
- 49072
- Int’l designator
- 2021-074B
- Launched
- 2021
Orbital elements from CelesTrak, as of 22 Sep 2026.
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