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Risat (Radar Imaging Satellite) is 70 per cent complete and on course for a launch at the end of 2009, says Ranganath Navalgund, the director of the Space Applications Centre of the Indian Space Research Organisation.

Risat will carry a C band (5.35 GHz) synthetic aperture radar. It will have a spatial resolution of 1.5 metres and be capable of trasmitting with single, dual or quad polarisation.

It will be broadly similar to the Canadian Radarsat-2. However, while Radarsat-2 will be focused on Canadian concerns in the high Artic, it is liklely that Risat will be much more concerned with measuring water availability in the more parched parts of India.

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