Names | DISHA-H and DISHA-L |
---|---|
Mission type | Aeronomy |
Operator | ISRO |
Mission duration | Planned: 5 years (with 3 years of combined operations) |
Start of mission | |
Launch date | Planned: 2024-25 |
Launch site | SDSC-SHAR |
Orbital parameters | |
Reference system | Geocentric |
Regime | LEO |
Perigee altitude | 400-450 km |
Apogee altitude | 400-450 km |
Inclination | DISHA-H: ~85.0° DISHA-L: 25.0° |
Period | 92.5 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) | |
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 [5] and are expecting readiness by 2024–25. [6][ needs update]
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. [5]
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.
Disturbed and quite-type Ionosphere System at High Altitude (DISHA) satellites are planned during 2024-25