Mission typeNavigation
COSPAR ID2016-027A
SATCAT no.41469
Mission duration12 years
Spacecraft properties
Spacecraft typeSatellite
ManufacturerISRO Satellite Centre
Space Applications Centre
Launch mass1,425 kilograms (3,142 lb)
Dry mass598 kilograms (1,318 lb)
Power1600 W
Start of mission
Launch date12:50:00, April 28, 2016 (UTC+05:30) (2016-04-28T12:50:00UTC+05:30)
RocketPSLV-XL C33
Launch siteSatish Dhawan (First)
Orbital parameters
Reference systemGeocentric
RegimeGeosynchronous Orbit (GSO)
Longitude129.429213 East
Perigee altitude35,780.961 km (22,233.258 mi)[1]
Apogee altitude35,796.200 km (22,242.727 mi)[1]

IRNSS-1G was the seventh and final[2] of the Indian Regional Navigation Satellite System (IRNSS) series of satellites after IRNSS-1A, IRNSS-1B, IRNSS-1C, IRNSS-1D, IRNSS-1E and IRNSS-1F. This system of satellites will provide navigational services to the Indian region. The satellite was launched successfully on 28 April 2016 at 07:20 UTC.[2]

IRNSS-1G along IRNSS-1A is being used only for NavIC's short message broadcast service and not for navigation.[3][4]


The satellite was launched from the First Launch Pad (FLP) of Satish Dhawan Space Centre, Sriharikota on board PSLV-C33 XL on 28 April 2016 at 12:50 PM IST.[2][5] The countdown of the launch had begun 51:30 hours before at 9:20 AM IST on 25 April 2016.[6]

After the launch of IRNSS-1G the Indian government named the IRNSS system as NAVIC (Navigation with Indian Constellation).[7]


Mission life: 12 years (planned).[6]

Lift-off mass:1,425 kilograms (3,142 lb)

Dry mass: 598 kilograms (1,318 lb).[8]

Payload: CDMA ranging payload in C band.[9][10] Navigation payload in L-5 and S band spectrums and Rubidium atomic clocks.[11]

Power: Two triple-junction solar panels to generate 1660W of energy and one Lithium-ion 90A-hr battery is used.[8]

Propulsion: MMH/MON3 based bipropellant system with 12×22N Attitude control thrusters and one 440N LAM.[10]

Orbit: Geosynchronous orbit at 129.5° East longitude with 5° inclination.[8][12]

Cost: Approximately 125 crore (US$17 million).[13]

Animation of IRNSS
Around the Earth
Around the Earth - Polar view
Earth fixed frame - Equatorial view, front
Earth fixed frame - Equatorial view, side
Earth fixed frame - Polar view
   Earth ·   IRNSS-1B  ·   IRNSS-1C  ·   IRNSS-1E  ·   IRNSS-1F  ·   IRNSS-1G  ·   IRNSS-1I

See also


  1. ^ a b "NORAD Catalog Number 41469". NORAD. Retrieved 2 June 2017.
  2. ^ a b c "India launches seventh navigation satellite, to get its own GPS". The Hindu. 28 April 2016. Retrieved 28 April 2016.
  3. ^ "Annual Report 2019-20". Department of Space. Retrieved 5 March 2020.
  4. ^ "ANNUAL REPORT 2020-2021" (PDF). ISRO. Retrieved 6 March 2021.
  5. ^ "PSLV-C33/IRNSS-1G". ISRO. Retrieved 28 April 2016.
  6. ^ a b PTI (26 April 2016). "Countdown for IRNSS-1G launch begins at Sriharikota". The Hindu. Retrieved 28 April 2016.
  7. ^ "PSLV-C33 Successfully Launches India's Seventh Navigation Satellite IRNSS-1G - ISRO". Retrieved 1 November 2021.
  8. ^ a b c "PSLV-C33 - IRNSS-1G Specifications" (PDF). ISRO. Retrieved 28 April 2016.
  9. ^ "'Isro launches rocket carrying India's seventh navigation satellite'". Business Standard. 28 April 2016. Retrieved 28 April 2016.
  10. ^ a b "SALIENT FEATURES OF IRNSS 1G". Retrieved 1 November 2021.
  11. ^ "IRNSS-1G". ISRO. Retrieved 28 April 2016.
  12. ^ Sangeeta Ojha (28 April 2016). "India's own navigation satellite IRNSS-1G launched: All you need to know about it". India Today. Retrieved 28 April 2016.
  13. ^ Vanita Srivastava (1 May 2016). "IRNSS: Desi GPS to liberate India from dependence on US, Russia". Economic Times. Retrieved 2 May 2016.