DISHA (spacecraft)

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 uppermost layers of Earth's atmosphere.[1][2][3] 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 are expecting readiness by 2024–25.[5]

DISHA
NamesDISHA-H and DISHA-L
Mission typeAeronomy
OperatorISRO
Mission durationPlanned: 3 years
Start of mission
Launch datePlanned: 2024-25
Launch siteSDSC-SHAR
Orbital parameters
Reference systemGeocentric
RegimeLEO
Perigee altitude400-450 km
Apogee altitude400-450 km
InclinationDISHA-H: ~85.0°
DISHA-L: 25.0°
Period92.5 minutes
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)
 

Payloads
  • Neutral mass spectrometer[4]
  • Airglow Photometer[4]
  • Drift meter[4]
  • Auroral X-ray Imaging Spectrometer (AXIS)[6]
  • High frequency Langmuir probe[4]
  • Electron temperature analyser[4]
  • Upper Atmosphere Visible Airglow Spectral Imager (UrVASI)[7]

References
  1. "Department of Space, Annual Report 2019-2020" (PDF). Archived from the original (PDF) on 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. "Space Applications Centre: 'Aeronomy satellite in advanced planning stage'". The Times of India. October 23, 2018. Retrieved 2022-01-27.
  3. "Instruments onboard Chandrayaan-3 undergoing tests, readying for launch later this year: Former ISRO chief". The Indian Express. 2022-01-27. Retrieved 2022-01-27.
  4. ISRO Exploration Mission - Space Radiation Workshop-2022 Day 3 (Video). ARIES Nainital. 2022-01-26. Event occurs at 45 minutes 36 seconds.
  5. "Rajya Sabha Unstarred Question No. 2955" (PDF). 18 July 2019. Retrieved 27 January 2022. Disturbed and quite-type Ionosphere System at High Altitude (DISHA) satellites are planned during 2024-25
  6. "OU receives slice of £1m Government funding to enhance space technology". OU News. 2021-03-19. Retrieved 2022-01-27.
  7. "Space Physics Laboratory Annual Report 2019-20" (PDF). Retrieved 27 January 2022.
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