DISHA (spacecraft) explained

DISHA
Names List:DISHA-H and DISHA-L
Mission Type:Aeronomy
Operator:ISRO
Mission Duration:Planned: 5 years (with 3 years of combined operations)
Launch Date:Planned: 2024-25
Launch Site:SDSC-SHAR
Orbit Reference:Geocentric
Orbit Regime:LEO
Orbit Periapsis:400-450 km
Orbit Apoapsis:400-450 km
Orbit Inclination:DISHA-H: ~85.0°
DISHA-L: 25.0°
Orbit Period:92.5 minutes
Apsis:gee
Instruments:Neutral Mass Spectrometer (NM)
Airglow Photometer (AP)
Drift Meter (DM)
Auroral X-ray Imaging Spectrometer (AXIS)
High frequency Langmuir Probe (LM)
Electron Temperature Analyser (ETA)
Upper Atmosphere Visible Airglow Spectral Imager (UrVASI)
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The Disturbed and quiet time Ionosphere-thermosphere System at High Altitudes (DISHA) is a proposed twin satellite aeronomy mission by the Indian Space Research Organisation. It will study the effects of space weather events on the uppermost layers of Earth's atmosphere.[1] [2] [3] The mission will consist of two small satellites namely DISHA-H and DISHA-L in high and low inclinations for simultaneous observation in polar and equatorial regions.[4] DISHA satellites will have expected mission life of 5 years with at least 3 years of combined operations and are expecting readiness by 2024–25.[5]

Payloads

DISHA-H and DISHA-L are similar in configuration with six common payloads each. But while DISHA-L has all of its six scientific payloads on fixed platform, DISHA-H has an additional scientific payload called Auroral X-ray Imaging Spectrometer (AXIS) and all seven of them are positioned on a rotatable deck to meet data transmission requirements.[6]

Notes and References

  1. Web site: Department of Space, Annual Report 2019-2020. https://web.archive.org/web/20211007125322/https://www.isro.gov.in/sites/default/files/flipping_book/annual_report_2019-20_english/files/assets/common/downloads/Annual%20Report%202019-20%20(English).pdf. 7 October 2021. There are proposals for two small satellites with high and low inclination named 'Disturbed and quiet time Ionosphere-thermosphere System at High Altitudes (DISHA)' which aims to study the effects in the Ionosphere-Thermosphere system during space weather events and normal condition of the Sun. The proposed DISHA mission will yield critical information on the structures in plasma and neutrals that adversely affect communication and navigation during space weather events. This will eventually help in a better description of influence of space weather on space based technological systems and sub-systems..
  2. Web site: October 23, 2018. Space Applications Centre: 'Aeronomy satellite in advanced planning stage'. 2022-01-27. The Times of India. en.
  3. Web site: 2022-01-27. Instruments onboard Chandrayaan-3 undergoing tests, readying for launch later this year: Former ISRO chief. 2022-01-27. The Indian Express. en.
  4. ISRO Exploration Mission - Space Radiation Workshop-2022 Day 3. 2022-01-26. Video. ARIES Nainital. 45 minutes 36 seconds.
  5. Web site: Rajya Sabha Unstarred Question No. 2955. Jatiya. Satyanarayan. 18 July 2019. 30 April 2023. Disturbed and quite-type Ionosphere System at High Altitude (DISHA) satellites are planned during 2024-25.
  6. DISHA H & L: ISRO's Proposed Twin Aeronomy Satellite mission . 2022-05-10 . Pallamraju . Duggirala . Video . English . 1 hour 05 minutes 22 seconds.
  7. Web site: 2021-03-19. OU receives slice of £1m Government funding to enhance space technology. 2022-01-27. OU News. en-GB.
  8. Web site: Space Physics Laboratory Annual Report 2019-20. 27 January 2022.

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