IRS-1B Home / Activities / Missions accomplished


Improved features compared to its predecessor : gyro referencing for better orientation sensing, time tagged commanding (IRS-1A) facility for more flexibility in camera operation and line count information for better data product generation.

Mission completed on December 20, 2003 after serving for 12 years and 4 months.

... Completes 25 Years

प्रमोचन भार / Launch Mass:
975 kg
शक्ति / Power:
600 W
Vostok
उपग्रह का प्रकार / Type of Satellite:
Earth Observation
निर्माता / Manufacturer:
ISRO
स्‍वामी / Owner:
ISRO
अनुप्रयोग / Application:
Earth Observation
कक्षा का प्रकार / Orbit Type:
SSPO (Sun Synchronous Polar Orbit)

Mission Operational Remote Sensing
Weight 975 kg
Onboard power 600 Watts
Communication S-band, X-band and VHF (commanding only)
Stabilization Three axis body stabilized (zero momentum) with
4 Reactions Wheels, Magnetic torquers
RCS Monopropellant Hydrazine based with sixteen
1 Newton thrusters
Payload Three solid state Push Broom Cameras LlSS-1
(72.5 metre resolution), LlSS-2A and
LlSS-2B (36.25 metre resolution)
Launch date August 29, 1991
Launch site Baikanur Cosmodrome Kazakhstan
Launch vehicle Vostok
Orbit 904 km Polar Sun Synchronous
Inclination 99.08o
Repetivity 22 days
Local time 10.30 a.m. (descending node)
Mission Completed On December 20, 2003