Indian Regional Navigation Satellite System (IRNSS)

IRNSS-1A is the first satellite in the Indian Regional Navigation Satellite System (IRNSS). It is one of the seven satellites constituting the IRNSS space segment.

Payloads - IRNSS-1A carries two types of payloads navigation payload and ranging payload. The navigation payload of IRNSS-1A 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-1A consists of a C-band transponder which facilitates accurate determination of the range of the satellite. IRNSS-1A also carries Corner Cube Retro Reflectors for laser ranging.

Applications of IRNSS

• Terrestrial, Aerial and Marine Navigation

• Disaster Management

• Vehicle tracking and fleet management

• Integration with mobile phones

• Precise Timing

• Mapping and Geodetic data capture

• Terrestrial navigation aid for hikers and travelers

• Visual and voice navigation for drivers

Lift-off Mass	1425 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	Jul 01, 2013
Launch site	SDSC SHAR Centre, Sriharikota, India
Launch vehicle	PSLV - C22