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Geostationary

FENGYUN 4B

Geostationary Weather · CMA / CNSA

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China's second Fengyun-4 geostationary weather satellite, positioned at 112°E for optimal coverage of East and Southeast Asia. FY-4B carries upgraded instruments compared to its predecessor FY-4A, including a higher-resolution imager, a next-generation lightning mapper, and an improved solar X-ray imager for space weather monitoring. Together FY-4A and FY-4B provide China's first two-satellite geostationary weather constellation — enabling rapid-scan mode over severe weather while maintaining full-disk imaging simultaneously.

Its orbit

Orbit
Geostationaryappears to hang motionless over one spot on the equator
Altitude
22,220–22,263 mi (35,759–35,828 km)
Inclination
0.4°
One orbit
23.9 hoursabout one orbit a day
NORAD ID
48808
Int’l designator
2021-047A
Launched
2021

Orbital elements from CelesTrak, as of 22 Sep 2026.

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