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IDRSS 1, 2 (CMS 04, xx)

IDRSS (Indian Data Relay Satellite System) is an Indian geostationary data relay satellite system consisting of two geostationary satellites. IDRSS will facilitate relay of information between various Indian spacecraft, in-flight launch vehicle monitoring and assist Indian Human Spaceflight Programme.

The main objectives of IDRSS are:

  • TTC, Data, Audio and Video links to Gaganyaan
  • TTC links to LEO satellite
  • Data transfer from Antarctica Ground Stations

The satellite is configured with data relay payloads operating in S, Ka and Ku bands. The satellite employs a 2.5 m deployable Cassegrain Antenna System operating in dual frequency bands (S and Ka bands) as well as a 1.5 m fixed Cassegrain Antenna System operating in Ku and Ka frequency bands. The deployable antenna system will have interface with the satellite by means of a deployable, pointing and tracking mechanism along with a S band rotary joint. The satellite bus is based on the I-2K (I-2000) Bus extended bus and will be compatible for launch onboard the GSLV Mk.2(4) Launch Vehicle.

Nation: India
Type / Application: Communication, data relay
Operator: Insat
Contractors: ISRO
Configuration: I-2K (I-2000) Bus
Power: 2 solar arrays, batteries
Lifetime: 15 years
Mass: ~2500 kg
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
IDRSS 1 (CMS 04) - 202x Sr GSLV Mk.2(4)
IDRSS 2 (CMS xx) - 202x Sr GSLV Mk.2(4)