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
880.57 km
Apogee
916.69 km
Inclination
99.4°
Period
104.4 min
Semi-major axis
7276.8 km
Velocity
7.4 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
Celestrak (SatNOGS)
TLE updated
2025-08-05 19:38:24
Two-line elements (TLE)
1 21688U 91061A 25217.48284861 -.00000224 00000+0 -12501-3 0 9991
2 21688 99.4026 212.6648 0024852 139.9253 23.6795 13.97805054624386