IRS-1B
Mission information
Status
Active
The satellite is in orbit
The network has not received data from this satellite for a long time
The satellite is in orbit
The network has not received data from this satellite for a long time
Orbital parameters of the satellite
Perigee
880.81 km
Apogee
916.26 km
Inclination
99.4°
Period
104.4 min
Semi-major axis
7276.7 km
Velocity
7.39 km/s
Mission timeline
Launch time
1991-08-29 00:00:00
Decayed time
Transmitters
Telemetry decoder IRS-1B
Decoder name
Decoder fields
Data for the last 30 days
Orbital Elements
Last two-line elements (TLE)
TLE source
Space-Track.org
TLE updated
2025-11-28 21:55:34
Two-line elements (TLE)
1 21688U 91061A 25332.64242919 -.00000064 00000-0 -11970-4 0 9998
2 21688 99.4095 330.6162 0024419 186.3083 284.2961 13.97831960640473
