NISAR (satellite) (Redirected from NISAR)

NASA-ISRO Synthetic Aperture Radar (NISAR)
Artist's concept of the NASA-ISRO Synthetic Aperture Radar (NISAR) satellite.
NamesNASA-ISRO Synthetic Aperture Radar
NISAR
Mission typeRadar imaging
OperatorNASA / ISRO
Websitenisar.jpl.nasa.gov
www.isro.gov.in/NISARSatellite.html
Mission duration3 years (planned)
Spacecraft properties
SpacecraftNISAR
BusI-3K
ManufacturerNASA / ISRO
Launch mass2,800 kg (6,200 lb)
Power6,500 watts
Start of mission
Launch date30 March 2024 (planned)
RocketGSLV Mk II
(4 meter fairing)
Launch siteSatish Dhawan Space Center
ContractorISRO
Orbital parameters
Reference systemGeocentric orbit
RegimeSun-synchronous orbit
Altitude747 km (464 mi)
Perigee altitude747 km (464 mi)
Apogee altitude747 km (464 mi)
Inclination98.5°
Transponders
BandS-band
L-band
Instruments
L-band (24-cm wavelength) Polarimetric Synthetic Aperture Radar
S-band (12-cm wavelength) Polarimetric Synthetic Aperture Radar

NISAR mission logo  

The NASA-ISRO Synthetic Aperture Radar (NISAR) mission is a joint project between NASA and ISRO to co-develop and launch a dual-frequency synthetic aperture radar on an Earth observation satellite. The satellite will be the first radar imaging satellite to use dual frequencies. It will be used for remote sensing, to observe and understand natural processes on Earth. For example, its left-facing instruments will study the Antarctic cryosphere. With a total cost estimated at US$1.5 billion, NISAR is likely to be the world's most expensive Earth-imaging satellite.

Overview

The NASA-ISRO Synthetic Aperture Radar, or NISAR satellite, will use advanced radar imaging to map the elevation of Earth's land and ice masses four to six times a month at resolutions of 5 to 10 meters. It is designed to observe and measure some of the planet's most complex natural processes, including ecosystem disturbances, ice-sheet collapse, and natural hazards such as earthquakes, tsunamis, volcanoes and landslides.

The mission is a partnership between NASA and ISRO. Under the terms of the agreement, NASA will provide the mission's L-band synthetic aperture radar (SAR), a high-rate telecommunication subsystem for scientific data GPS receivers, a solid-state recorder, and a payload data subsystem. ISRO will provide the satellite bus, an S-band synthetic aperture radar (SAR), the launch vehicle, and associated launch services.

All data from NISAR will be freely available one to two days after observation and within hours in case of emergencies like natural disasters. Data collected from NISAR will reveal information about the evolution and state of Earth's crust, help scientists better understand our planet's natural processes and changing climate, and aid future resource and hazard management.

The satellite will be three-axis stabilized. It will use a 12 m (39 ft) deployable mesh antenna and will operate on both the L- and S- microwave bands. The aperture mesh reflector (antenna) will be supplied by Astro Aerospace, a Northrop Grumman company.

The satellite will be launched from India aboard a GSLV Mark II on 30 March 2024. The orbit will be a Sun-synchronous, dawn-to-dusk type. The planned mission life is three years.The project has passed the first stage of the design validation phase and has been reviewed and approved by NASA.

ISRO's share of the project cost is about 788 crore (US$99 million), and NASA's share is about US$808 million.

Payload

  • L-band (1.25 GHz; 24 cm wavelength) polarimetric SAR, to be produced by NASA.
  • S-band (3.20 GHz; 9.3 cm wavelength) polarimetric SAR, to be produced by ISRO.

See also


This page was last updated at 2024-02-06 10:41 UTC. Update now. View original page.

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