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 Mass1425 kg
Physical Dimensions1.58 metre x 1.50 metre x 1.50 metre
OrbitGeosynchronous, at 55 deg East longitude with 29 deg inclination
PowerTwo solar panels generating 1660 W, one lithium-ion battery of 90 Ampere-Hour capacity
Propulsion440 Newton Liquid Apogee Motor, twelve 22 Newton Thrusters
Control SystemZero momentum system, orientation input from Sun & star Sensors and Gyroscopes; Reaction Wheels, Magnetic Torquers and 22 Newton thrusters as actuators
Mission Life10 years
Launch dateJul 01, 2013
Launch siteSDSC SHAR Centre, Sriharikota, India
Launch vehiclePSLV - C22

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