Indian Data Relay Satellite System Explained

Indian Data Relay Satellite System
Manufacturer:ISRO
Country:India
Bus:I-2K[1]
Applications:Data transmission
Orbits:Geostationary
Orbit Reference:Geocentric
Operator:ISRO
Status:Planned
First:IDRSS-1
2024[2] [3] (planned)
Mass:Less than

Indian Data Relay Satellite System or IDRSS is a planned Indian constellation of Inter-satellite communications satellites. It is planned to initially comprise two satellites, CMS-04 (formerly IDRSS-1) & IDRSS-2 in geostationary orbit. It will facilitate relay of information between various Indian spacecraft, in-flight launch vehicle monitoring and assist the Indian Human Spaceflight Programme.[4] [5]

Objectives

A Data Relay Satellite System (DRSS) facilitates continuous real-time communication between Low Earth orbit bound spacecraft to the ground station as well as inter-satellite communication. Such a satellite in geostationary orbit can track a low altitude spacecraft up to almost half of its orbit.

India operates one of world's largest remote sensing satellites systems. Visibility of these satellites is not more than 10–15 minutes in a day and sometimes even lower. The IDRSS satellites, one opposite to each half of earth in GEO, can see about 80 per cent of the area where Indian remote sensing satellites are orbiting, hence enhancing visibility range and data transfer rates of satellites. IDRSS can also monitor a launch vehicle from the time it lifts off from the launch pad. Satellites will hereby also reduce dependency on ground stations. Implementation of the system will be essential for tracking Gaganyaan, India's future crewed spacecraft.

The main objectives of IDRSS are:

Design

IDRSS satellites would be based on 2,000 kg class, I-2K extended bus and will be compatible for launch onboard GSLV Mk-II Launch Vehicle.[6]

Payload

The deployable antenna system will interface with the satellite by means of a deployable, pointing and tracking mechanism along with a S band rotary joint. Satellites might carry optical communication payload for increased data security and high transfer rates.[7]

Satellites

IDRSS series satellites! Satellite! Int. Sat. ID! NORAD ID! Launch Date! Launch Vehicle! Orbit! Status! Remarks
CMS-04 (IDRSS-1)TBDTBD2024[8] GSLV[9] GSOPlanned
IDRSS-2TBDTBD2024[10] GSLVGSOPlanned

Launch

IDRSS was approved by the Government of India and had funds allocated in budget of 2019-20.[11] CMS-04 would be the first spacecraft in the IDRSS constellation,[4] [12] and its launch is currently scheduled for 2023.

See also

Notes and References

  1. News: New satellites will help Gaganyaan crew . 6 January 2020 . 6 January 2020.
  2. Web site: 2023-07-30 . ISRO 'going to have exciting missions' in 2023, says Chairman Somanath . 2023-07-30 . www.livemint.com . en.
  3. Web site: Kumar . Chethan . 2 Gaganyaan abort tests in August, December; relay satellites next year . . 6 April 2022 . 7 April 2022.
  4. News: ISRO to launch two satellites under IDRSS: All about it. December 17, 2018. India Today. October 5, 2019. https://web.archive.org/web/20191006172004/https://www.indiatoday.in/education-today/gk-current-affairs/story/satellites-isro-idrss-1411248-2018-12-17. 6 October 2019.
  5. Web site: Newsletter of the Indian Society of Remote Sensing - Ahmedabad Chapter Volume :25 No.2. 2013. 34. dead. https://web.archive.org/web/20160417003733/http://sac.gov.in/server/SacSliderI_Repository/Vyom/English/87/11_ISRS-AC_Newsletter_Signatures_Apr_Sep_2013Vol26_No2_RS_data_products_and_Retrievals.pdf. 17 April 2016.
  6. Web site: Department of Space Annual Report 2020-21. dead. 5 March 2021. 25 April 2021. https://web.archive.org/web/20210425173704/https://www.isro.gov.in/sites/default/files/anual_report_2020-2021_english.pdf.
  7. Web site: January 1, 2018. Study of Data Relay Satellite System and its Relevance to Indian context. live. https://web.archive.org/web/20180822061317/https://acadpubl.eu/jsi/2018-118-16-17/articles/16/77.pdf. 22 August 2018. October 5, 2019. acadpubl.eu/ap/.
  8. Web site: 2023-07-30 . ISRO 'going to have exciting missions' in 2023, says Chairman Somanath . 2023-07-30 . www.livemint.com . en.
  9. Web site: Kumar . Chethan . Operations hit, but Isro still hopes for December launch . . 29 May 2021 . 4 June 2021.
  10. Web site: 2023-07-30 . ISRO 'going to have exciting missions' in 2023, says Chairman Somanath . 2023-07-30 . www.livemint.com . en.
  11. Web site: Detailed Demands for Grants of Department of Space for 2019-2020. live. https://web.archive.org/web/20190818022301/https://www.isro.gov.in/sites/default/files/article-files/right-to-information/detailed_demands_for_grants_of_dos_for_2019-20.pdf. 18 August 2019. 6 October 2019.
  12. ORF-KC 2019 Spotlight Speech T.K. Anuradha. 19 May 2019. en.

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