IRS-1D

India

International Sat. n°:

Indian satellite n°: 27

IRS= Indian Remote Sensing Satellite

Launch data:

Designation	24971 / 97057A
Launch date	29 Sep 1997 - 04:47 UT
Launch site	Sriharikota
Launch vehicle	PSLV-C1(#4)
Serial n°	C1
Mission	Government: Earth Observation (Remote sensing)
Sun-Sunchronous LEO Earth orbit:
Perigee / Apogee	738 x 824 km
Eccentricity	6,01E-03
Inclination	98.6 deg
Period	100.48 min

Specifications

Prime contractor	ISRO
Platform
Operator	Indian Space Research Organization (ISRO)
Mass at launch	1361 kg
Mass in orbit
Dimension	1.65 x 1.5 x 2.1 m
Solar array	9.6 m²
Stabilization	3-axis
DC power	809 W
Design lifetime	3 years

End of live:

End of Operation:	Dec 2011
Cause:

LISS 3 (Linear Imaging Self Scanner) with CCD detector arrays

Wavebands	Green: 0.52-0.59 µm Red: 0.62-0.68 µm Near Infrared: 0.77-0.86 µm SW Infrared: 1.55-1.70 µm
Resolution	23 m except for SW IR: 70 m
Swath width	142 km except for SW IR: 148 km

WiFS:

Wavebands	Red: 0.62-0.68 µm Near IR: 0.77-0.86 µm
Resolution	189 m
Swath width	774 km

Panchromatic:

Wavebands	0.5-0.75 µm
Resolution	6 m
Swath width	70 km

Has a 4.5 kg GPS receiver

Mission details:

Is a clone of IRS 1C with a few minor improvements. It will server as in-orbit replacement for IRS 1C.
Was launched in a bad orbit: 300 x 823 km. The correction to the initial orbit would have consumed too much fuel so the satellite was placed in an elliptical sunsynchronous orbit. The manoeuvres consumed about 67 kg of its fuel, leaving slightly over 16 kg.

Ref: #7, #226 - update: 10.02.12