IRNSS Nominal Constellation

• IRNSS Nominal Constellation by Langley on 03 Feb, 2015 20:31
• Are the nominal orbit parameters of the full 7-satellite IRNSS constellation (3 GSO and 4 IGSO) available? I have the orbit longitudes. But I'm looking for the relative phasing information for the IGSOs in particular. A table of the nominal Keplerian elements for all seven satellites (as we have for the full Galileo constellation) would be helpful. Thanks.
  -- (Prof.) Richard Langley
• #1 by Gabbar on 04 Feb, 2015 16:02
• Hello Professor, as far as I know, ISRO has not published  any table featuring nominal Keplerian elements of all the seven satellites of the constellation. Also, there are some slight variations in the data that has been published by ISRO till date.
  
  From all the data that is available online, this is what I know:
  
  55°E longitude, 29° inclination, GSO          [IRNSS-1A]
  55°E longitude, 29° inclination, GSO          [IRNSS-1B]
  83°E longitude, GEO                                  [IRNSS-1C]
  34°E longitude, GEO
  131.5°E longitude, GEO
  111.5°E longitude, 29° inclination, GSO
  111.5°E longitude, 29° inclination, GSO
  
  There are plans  for 4 other IGSO satellites to augment the constellation later on:
  48.5°E longitude, 42° inclination, GSO
  69°E longitude, 42° inclination, GSO
  97.5°E longitude, 42° inclination, GSO
  121.5°E longitude, 42° inclination, GSO
  
  Sources:
  
  IRNSS-1A
  ------------------
  http://www.isro.gov.in/sites/default/files/pdf/pslv-brochures/PSLVC22.pdf
  http://www.n2yo.com/satellite/?s=39199
  
  IRNSS-1B
  ------------------
  http://www.isro.gov.in/sites/default/files/pslv-c24-brochure.pdf
  http://www.n2yo.com/satellite/?s=39635
  
  
  IRNSS-1C
  ------------------
  http://www.isro.gov.in/pslv-c26-irnss-1c-brochure
  http://www.n2yo.com/satellite/?s=40269
  
  
  
  
  

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  IRNSS_Signal-in-Space ICD for SPS_v-1.0.pdf