NISAR (satellite)
 Artist's concept of the NASA-ISRO Synthetic Aperture Radar (NISAR) satellite. | |
| Names | NASA-ISRO Synthetic Aperture Radar NISAR |
|---|---|
| Mission type | Radar imaging |
| Operator | NASA / ISRO |
| COSPAR ID | 2025-163A |
| SATCAT no. | 65053 |
| Website | nisar www |
| Mission duration | Planned: 5 years Duration: 1 year, 1 month, 11 days |
| Spacecraft properties | |
| Spacecraft | NISAR |
| Bus | I-3K |
| Manufacturer | NASA / ISRO |
| Launch mass | 2,393 kg (5,276 lb) |
| Power | 6,500 watts |
| Start of mission | |
| Launch date | 30 July 2025, 12:10 UTC 05:40pm IST |
| Rocket | GSLV F16 (4 meter fairing) |
| Launch site | Satish Dhawan Space Centre |
| Contractor | ISRO |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Sun-synchronous orbit |
| Altitude | 747 km (464 mi) |
| Perigee altitude | 747 km (464 mi) |
| Apogee altitude | 747 km (464 mi) |
| Inclination | 98.5° |
| Transponders | |
| Band | S-band L-band |
| Instruments | |
| L-band (24-cm wavelength) Polarimetric Synthetic Aperture Radar S-band (9.4-cm wavelength) Polarimetric Synthetic Aperture Radar | |
 NISAR mission logo | |
The NASA-ISRO Synthetic Aperture Radar (NISAR) is an Earth observation satellite (EOS) equipped with dual-frequency synthetic-aperture radar (SAR) jointly developed by NASA and ISRO, launched by ISRO on 30 July 2025 from Satish Dhawan Space Centre. It is the first radar imaging satellite to use dual frequencies. It is being used for remote sensing, to observe and understand natural processes on Earth. With a total cost estimated at US$1.5 billion, NISAR is likely to be the world's most expensive Earth-imaging satellite.