Doppler Radar: Important Topics for UPSC Exams​

Doppler Radar: Important Topics for UPSC Exams​

What is Radar?

  • Radar (Radio Detection and Ranging) is a device which uses electromagnetic waves in the microwaves region to detect location (range & direction), altitude, intensity and movement of moving and non-moving objects.

What is Doppler Principle?

  • When the source and the signal are in relative motion to each other there is a change in the frequency observed by the observer. If they are moving closer frequency increases and vice versa.

What is Doppler Radar?

  • Doppler radar is a specific radar that uses the Doppler principle to produce relative motion data about objects at a distance.

Indian Doppler Radar:

  • Also known as INDRA series of 2D Radars and developed by DRDO for the use of Airforce and the Army. Some have been even exported to Sri Lanka.
  • INDRA-1: Is low-level target detection mobile surveillance radar.
  • INDRA 2: Is a modified version of INDRA radar for ground controlled interception of targets. It uses pulse compression to detect low flying aircraft.

Application of Doppler Radars:

  • Aviation,
  • Sounding satellites
  • Meteorology
  • Radar guns
  • Radiology and healthcare
  • Nursing or clinic purpose
  • Bistatic radar (surface-to-air missile)

Doppler Weather Radar (DWR) by ISRO

  • For improving weather forecasting services.
  • The DWR will help in rainfall estimation and detect thunderstorm, cyclones and other severe weather events within a radius of 400 km.
  • DWR has the equipment to measure rainfall intensity, wind shear and velocity and locate a storm centre and the direction of a tornado or gust front.
  • Based on Doppler principle the radar is designed to improve precision in long-range weather forecasting and surveillance using a parabolic dish antenna and a foam sandwich spherical radome.

Buy Printed Study Material for IAS Pre General Studies (Paper-1)

Online Crash Course for UPSC PRE Exam

<< Go Back to Main Page