| Names | Radar Imaging Satellite-2B |
|---|---|
| Mission type | Earth observation Radar imaging satellite disaster management) |
| Operator | ISRO |
| COSPAR ID | 2019-028A |
| SATCATno. | 44233 |
| Website | https://www.isro.gov.in/ |
| Mission duration | 5 years (planned) 5 years, 9 months and 16 days(in progress) |
| Spacecraft properties | |
| Spacecraft | RISAT-2B |
| Bus | RISAT |
| Manufacturer | Indian Space Research Organisation |
| Launch mass | 615 kg (1,356 lb) |
| Power | 2000watts |
| Start of mission | |
| Launch date | 22 May 2019, 00:00UTC |
| Rocket | Polar Satellite Launch Vehicle-CAPSLV-C46 |
| Launch site | Satish Dhawan Space Centre,First Launch Pad (FLP) |
| Contractor | Indian Space Research Organisation |
| Entered service | August 2019 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Sun-synchronous orbit |
| Altitude | 555 km (345 mi) |
| Inclination | 37.0° |
| Period | 93.0 minutes |
| Instruments | |
| Synthetic Aperture Radar (X-band) (SAR-X) | |
RISAT-2B, orRadar Imaging Satellite-2B is an Indianradarreconnaissance satellite that is part of India'sRISAT programme and the third satellite in the series. It is built byIndian Space Research Organisation (ISRO) to replaceRISAT-2.
RISAT-2B satellites will succeed India's ten-year-oldRISAT-2 spacecraft. Equipped withX-band radar imagers, RISAT-2B monitors theEarth day and night, in any weather conditions. RISAT uses a technique called Synthetic Aperture Radar (SAR) to build images of the Earth below it. Signals transmitted from the satellite are reflected from the surface and its echo is recorded when it reaches back to the satellite. These signals can then be processed to build a profile of the ground below. The RISAT constellation is operated by theISRO. While ISRO states the satellites applications as supportingagriculture,forestry anddisaster management, their primary purpose is military surveillance.[1]
RISAT-2B can operate in different modes includingVery High Resolution Radar (VHRR) imaging modes of 1 × 0.5 m resolution and 0.5 × 0.3 m resolution. It is placed in an inclined orbit for better revisit rates over area of interest. Being a radar imaging satellite, RISAT-2B can image during day or night and in all weather conditions.[2]
RISAT-2B's main sensor is an indigenously developedsynthetic-aperture radar (SAR) imaging satellite operating inX-band with 3.6 m radial rib antenna. The satellite is utilized for high resolution spot imaging of locations of interest and it has a mass of 615 kg (1,356 lb).[3]
It was successfully launched aboard aPolar Satellite Launch VehiclePSLV-C46 launch vehicle at 00:00UTC on 22 May 2019 from theFirst Launch Pad at theSatish Dhawan Space Centre.[4][5]
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