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IMD to add 30 Doppler radars in country

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Mains Paper 3: Science & Technology | Science and Technology- developments and their applications and effects in everyday life Achievements of Indians in science & technology; indigenization of technology and developing new technology

From UPSC perspective, the following things are important:

Prelims level: Particulars of the Doppler Radars

Mains level: Need of these radars.


News

New Doppler radars

  1. The India Meteorological Department (IMD) will add 30 Doppler radars in the next two-three years across the country
  2. Several of them will be in the northeast

What are Doppler radars?

  1. Doppler radars provide precise information about thunderstorms, dust storms, hailstorms, rainfall and wind patterns
  2. With a radius of 250km, they help in issuing nowcasts 2-3 hours prior to severe weather events
    How it works?
  3. A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance
  4. It does this by bouncing a microwave signal off a desired target and analyzing how the object’s motion has altered the frequency of the returned signal
  5. This variation gives direct and highly accurate measurements of the radial component of a target’s velocity relative to the radar

Right now, the IMD is working on selecting locations in hilly states to install these radars

  1. By the next year, Jammu and Kashmir will get four Doppler radars, Uttarakhand and Himachal Pradesh three each
  2. The hilly states of Uttarakhand, Himachal Pradesh and Jammu and Kashmir witness erratic patterns like thunderstorms and heavy rains and snowfall, so do the north eastern states
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