Apr 04, 2014


IRNSS-1B is the second dedicated navigation satellite of India. It is one of the seven satellites constituting the IRNSS space segment. Its predecessor, IRNSS-1A, was launched by PSLV-C22 in July 2013. IRNSS-1B has a lift-off mass of 1432 kg. The configuration of IRNSS-1B is similar to that of IRNSS-1A. The satellite has been realised in less than seven months after the launch of its predecessor.

Payloads - IRNSS -1B carries two types of payloads - navigation payload and ranging payload. The navigation payload of IRNSS-1B transmits navigation service signals to the users. This payload is operating in L5-band and S-band. A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite. The ranging payload of IRNSS-1B consists of a C-band transponder which facilitates accurate determination of the range of the satellite. IRNSS-1B also carries Corner Cube Retro Reflectors for laser ranging.

off Mass 1432 kg
Physical Dimensions 1.58 metre x 1.50 metre x 1.50 metre
Orbit Geosynchronous, at 55 deg East longitude with 29 deg inclination
Power Two solar panels generating 1660 W, one lithium-ion battery of 90 Ampere-Hour capacity
Propulsion 440 Newton Liquid Apogee Motor, twelve 22 Newton Thrusters
Control System Zero momentum system, orientation input from Sun & star Sensors and Gyroscopes; Reaction Wheels, Magnetic Torquers and 22 Newton thrusters as actuators
Mission Life 10 years
Launch date Apr 04, 2014
Launch site SDSC SHAR Centre, Sriharikota, India
Launch vehicle PSLV - C24


प्रमोचन भार / Launch Mass: 
1432 kg
आयाम / Dimension: 
1.58 metre x 1.50 metre x 1.50 metre
मिशन कालावधि / Mission Life : 
10 years
शक्ति / Power: 
1660 W
प्रमोचक राकेट / Launch Vehicle: 
उपग्रह का प्रकार / Type of Satellite: 
निर्माता / Manufacturer: 
स्‍वामी / Owner: 
अनुप्रयोग / Application: 
कक्षा का प्रकार / Orbit Type: