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CLASSIFIED

YAOGAN-31 02B

Chinese ELINT Naval Surveillance (JB-8 Triplet) · CASC / PLA

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Second satellite of the second Yaogan-31 triplet, part of China's continuing investment in the high-altitude JB-8 family of ELINT triplets alongside Yaogan-9, 16, 17, 20, and 25. This parallel high-altitude constellation, running alongside the much larger low-altitude Yaogan-30 program, suggests China values redundant naval surveillance architectures operating at different orbital geometries simultaneously.

Its orbit

Orbit
Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
Altitude
595–766 mi (957–1,233 km)
Inclination
63.4°
One orbit
107.0 minutes13.5 orbits a day
NORAD ID
47533
Int’l designator
2021-007B
Launched
2021

Orbital elements from CelesTrak, as of 23 Sep 2026.

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