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| orbit_reference = [[Geocentric orbit]]<ref name="ISRO-C52/> |
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| Names | Radar Imaging Satellite-1A Earth Observation Satellite-4 |
|---|---|
| Mission type | Imaging radar |
| Operator | ISRO |
| COSPAR ID | 2022-013A  |
| SATCAT no. | 51656 |
| Website | www |
| Mission duration | 10 years (planned)[1] |
| Spacecraft properties | |
| Spacecraft | EOS-04 |
| Manufacturer | Indian Space Research Organisation |
| Launch mass | 1,710 kg (3,770 lb)[1] |
| Power | 2280 watts [1] |
| Start of mission | |
| Launch date | 14 February 2022, 00:29 UTC |
| Rocket | Polar Satellite Launch Vehicle, PSLV-C52 |
| Launch site | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| Contractor | Indian Space Research Organisation |
| Orbital parameters | |
| Reference system | Geocentric orbit[2] |
| Regime | Sun-synchronous orbit |
| Perigee altitude | 529 km (329 mi) |
| Apogee altitude | 529 km (329 mi) |
| Inclination | 97.84° |
| Period | 96.50 minutes |
| Instruments | |
| Synthetic Aperture Radar (X-band) (SAR-X) | |
Radar Imaging Satellite-1A, or RISAT-1A, is a planned remote sensing satellite as a follow on to RISAT-1 and with similar configuration. The satellite is being developed by Indian Space Research Organisation (ISRO) and it will be sixth in series of RISAT satellites. It will be a land based mission with primary application in terrain mapping and analysis of land, ocean and water surface for soil moisture.[3]
Synthetic aperture radar can be used for Earth observation irrespective of the light and weather conditions of the area being imaged.[4] The satellite will carry a C-band synthetic-aperture radar (SAR) and will have a liftoff mass of 1,710 kg (3,770 lb).[2]
Payload metrics are defined by the following parameters and areas of study:
| Category | Parameters |
|---|---|
| Land | Albedo and reflectance |
| Soil moisture | |
| Vegetation | |
| Multi-purpose imagery | |
| Ocean | Ocean topography/currents |
| Snow & Ice | Ice sheet topography |
| Snow cover, edge and depth | |
| Sea ice cover, edge and thickness |
RISAT-1A will be launched on the Polar Satellite Launch Vehicle (PSLV-C52). RISAT-1A is planned to be launched at 00:29 UTC on 14 February 2022.[5][6]
{{cite web}}: CS1 maint: numeric names: authors list (link)
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