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RISAT 1 (Radar Imaging Satellite 1), an ISRO Earth observation satellite, was launched from Sriharikota Island on 26 April 2012 at 00:17 UT by a Polar Satellite Launch Vehicle (PSLV-XL). The satellite weighed 1858 kg making it the most massive spacecraft launched by a PSLV to date. RISAT 1 is the first satellite of the RISAT series to be built but the second to be launched. RISAT 2 was launched in 2009. RISAT-1 will be used for disaster prediction, agriculture forestry and the high resolution pictures and microwave imaging could also be used for defense purposes. It carries a C-band microwave synthetic aperture radar, operating on a frequency of 5.35 GHz. Its twin solar arrays are expected to provide around 2.2 kW of power to the spacecraft¿s systems; the spacecraft is also equipped with a 70 amp-hour nickel-hydrogen battery which the solar arrays will charge. It is the country's first indigenous radar observation satellite. RISAT 1 is expected to operate in orbit for five years, making approximately fourteen orbits every day with a ground track which will repeat every 25 days. The first images should be returned from RISAT 1 in about five days.

Alternate Names

  • 38248
  • RISAT1

Facts in Brief

Launch Date: 2012-04-26
Launch Vehicle: PSLV-XL
Launch Site: Sriharikota, India
Mass: 1858 kg

Funding Agency

  • Indian Space Research Organization (India)


  • Earth Science

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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