Indian Regional Navigation Satellite System (IRNSS)

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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

Indian Space ISRO

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