RISAT-1
Render of RISAT-1 satellite | |
| Names | Radar Imaging Satellite-1 |
|---|---|
| Mission type | Earth observation Radar imaging satellite |
| Operator | ISRO |
| COSPAR ID | 2012-017A |
| SATCAT no. | 38248 |
| Website | https://www.isro.gov.in/ |
| Mission duration | 5 years (planned) 4 years (achieved) |
| Spacecraft properties | |
| Bus | RISAT |
| Manufacturer | Indian Space Research Organisation |
| Launch mass | 1,858 kg (4,096 lb) |
| Power | 2.2 kW |
| Start of mission | |
| Launch date | 26 April 2012, 00:17 UTC |
| Rocket | Polar Satellite Launch Vehicle-XL, PSLV-C19 |
| Launch site | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| Contractor | Indian Space Research Organisation |
| Entered service | 19 October 2012 |
| End of mission | |
| Deactivated | 31 March 2017 |
| Last contact | 30 September 2016 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Sun-synchronous orbit |
| Perigee altitude | 539 km (335 mi) |
| Apogee altitude | 543 km (337 mi) |
| Inclination | 97.55° |
| Period | 95.49 minutes |
| Mean motion | 14 |
| Instruments | |
| Synthetic-aperture radar (C-band) (SAR-C) | |
Radar Imaging Satellite 1 or RISAT-1, was an Indian remote sensing satellite built and operated by the Indian Space Research Organisation (ISRO). The second RISAT satellite to be launched, it used a C-band 5.35 GHz synthetic-aperture radar (SAR) for Earth observation.
The launch of RISAT-1 came several years after that of RISAT-2, which carried an Israeli-built X-band radar. The RISAT-2 mission was prioritised over RISAT-1 following the 2008 Mumbai attacks, resulting in RISAT-1 being delayed by several years.