BEIDOU-3S IGSO-1S (C31)
NORAD 40549· COSPAR 2015-019A· Navigation· IGSO
Launch
Launched on Mar 30, 2015 from Launch Complex 2 (LC-2), China aboard a Long March 3C/YZ-1.
Long March 3C/YZ-1 | BDS I1-S →Live · TLE epoch 2026-10-20 23:11 UTC
Orbit class
IGSO — Inclined Geosynchronous (BeiDou / QZSS, figure-8 ground track)
Operator
CNSA
Country
China
Manufacturer
CAST
Launched
Mar 30, 2015
Mass
—
Apogee
35,954 km
Perigee
35,629 km
Inclination
48.96°
Period
23.93 h
Part of the BeiDou constellation · this satellite is one of 56
Chinese navigation constellation. Mix of MEO, GEO, and IGSO.
Altitude history
Apogee and perigee for BEIDOU-3S IGSO-1S (C31) across 148 days of archived orbital elements (150 element sets, one per day).
Trend
Decaying
Change
-7.1 km
Rate
-0.05 km/day
Now
35629 × 35954 km
Apogee Perigee
Derived from our own archive of CelesTrak orbital elements, sampled every 3 hours. Short windows show drag and station-keeping; they are not a reentry prediction.
Related satellites
Sources & further reading
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