Isro indigenously developed the Doppler radar technology and transferred it it to Bharat Electronics Ltd for production. The system operates in S band and capable of monitoring clouds, precipitation systems and winds over large areas of more than 400 km from radar location. Doppler radar will be in sync with technology used worldwide and customized to Indian climactic conditions . Doppler radars can update information every 5 minutes compared to 15 minutes to 30 minutes needed for satellite reports . A series of deluges since 2006 prompted Indian Meteorological Department (IMD) authorities to choose advanced Doppler radars and the Centre decided to install them at 17 locations, including Mumbai, on the west coast. These systems at Kolkata, Chennai and Visakhapatnam are already operational and the indigenous radar is being used Sriharikota since April 2004. The radar can also forecast hailstorms, thunderstorms, cyclones, cloudbursts and measure the rainfall likely to occur at a particular place.
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