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IRNSS

Jump to: Mission Objectives, Mission Instrumentation, Mission Parameters, Additional Information

Mission Photos:

IRNSS-1A satellite
Courtesy of ISRO

Mission Objectives:

The Indian Regional Navigation Satellite System (IRNSS) consists of a constellation of seven satellites and a ground segment for positioning and timing applications. IRNSS is under development by the Indian Space Research Organisation (ISRO). INRSS will include three satellites in geostationary orbit and four satellites in geosynchronous orbit, transmitting L-band and S-band signals and providing coverage primarily for the Indian land mass.

SLR tracking data will be used for orbit determination and calibration of the orbit determined from other sources.

Notes:

  • IRNSS-1H had a launch failure on August 31, 2017.
  • IRNSS-1G does not have a retroreflector array.
Mission Instrumentation:

IRNSS satellites will have the following instrumentation onboard:

  • Atomic clocks
  • L and S-band transmitters
  • Retroreflector array
Mission Parameters:
Satellite: IRNSS-1A IRNSS-1B IRNSS-1C IRNSS-1D
Sponsor: ISRO ISRO ISRO ISRO
Expected Life: 10 years 12 years 12 years 12 years
Primary Applications: Positioning and timing Positioning and timing Positioning and timing Positioning and timing
Primary SLR Applications: Orbit determination Orbit determination Orbit determination Orbit determination
COSPAR ID: 1303401 1401701 1406101 1501801
SIC Code: 3301 3302 3303 3304
NORAD SSC Code: 39199 39635 40269 40547
Launch Date: July 1, 2013 April 4, 2014 October 15, 2014 March 27, 2015
NP Bin Size: 300 seconds 300 seconds 300 seconds 300 seconds
RRA Shape: Hexagon Hexagon Hexagon Hexagon
Cube Diameter: 38 mm 38 mm 38 mm 38 mm
Reflectors: 40 corner cubes 40 corner cubes 40 corner cubes 40 corner cubes
Inclination: 29.3 degrees 30.57 degrees 4.78 degrees 30.43 degrees
Longitude: 55.0 degrees East 55.0 degrees East 83.0 degrees East 111.75 degrees East
Eccentricity: 0.0002 0.0002 0.0002 0.0002
Apogee: 35,882.7 km 35,870 km 35,889 km 35,884.1 km
Perigee: 35,706.1 km 35,714 km 35,697 km 35,750 km

 

Satellite: IRNSS-1E IRNSS-1F IRNSS-1G IRNSS-1H
Sponsor: ISRO ISRO ISRO ISRO
Expected Life: 12 years 12 years 12 years 12 years
Primary Applications: Positioning and timing Positioning and timing Positioning and timing Positioning and timing
Primary SLR Applications: Orbit determination Orbit determination Orbit determination Orbit determination
COSPAR ID: 1600301 1601501 1602701 1705101
SIC Code: 3305 3306 3307 3308
NORAD SSC Code: 41241 41384 41469 42928
Launch Date: January 20, 2016 March 10, 2016 April 28, 2016 August 31, 2017
NP Bin Size: 300 seconds 300 seconds N/A  
RRA Shape: Hexagon Hexagon N/A Hexagon
Cube Diameter: 38 mm 38 mm N/A 38 mm
Reflectors: 40 corner cubes 40 corner cubes N/A 40 corner cubes
Inclination: 28.09 degrees 32.5 degrees 4.2537 degrees  
Longitude: 111.75 degrees East 32.5 degrees East 129.5 degrees East Launch Failure
Eccentricity: 0.0002 0.0002    
Apogee: 35,882.8 km 35,876 km 35,796.20 km  
Perigee: 35,706.5 km 35,711.5 km 35,780.96 km  

 

Satellite: IRNSS-1I IRNSS-1J
Sponsor: ISRO ISRO
Expected Life: 12 years 12 years
Primary Applications: Positioning and timing Positioning and timing
Primary SLR Applications: Orbit determination Orbit determination
COSPAR ID: 1803501 2307601
SIC Code: 3309 3310
NORAD SSC Code: 43286 56759
Launch Date: April 11, 2018 May 29, 2023
NP Bin Size: 300 seconds 300 Seconds
RRA Shape: Hexagon Hexagon Array
Cube Diameter: 38 mm 40.4 mm
Reflectors: 40 corner cubes 40 corner cubes
Inclination: 28.8 degrees 5.0 degrees
Longitude: 55.0 degrees East 129.55 degrees East
Eccentricity: 0.0002 0.0002
Apogee: 35,873.8 km 35,790 km
Perigee: 35,713.9 km 36,000 km

Additional Information:

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