Prelims level : Science & Technology- Defence Technology Mains level : GS-III- Awareness in the fields of IT, Space, Computers, Robotics, Nano-Technology, Bio-Technology and issues relating to Intellectual Property Rights.
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Why in News?

  • A contract for installation and commissioning of nine Precision Approach Radars (PARs) was concluded today between Ministry of Defence and M/s Data Pattern (India) Pvt Ltd at a cost of Rs 380 crores under ‘Buy Indian’ category.
  • The state-of-the-art radars incorporating latest Phased Array technology will be installed at Indian Naval Air Stations and Indian Air Force Stations.

Precision Approach Radars:

  • Precision Approach Radar (PAR) is a primary radar used at aerodromes for approach operations based on specific procedures for the pilot and the controller; however, the use of PARs for civil applications is rapidly decreasing. Precision Approach Radar offers the possibility of a safe landing even in poor visibility conditions.
  • The radar is placed near the mid-point of the runway (at a distance up to 6.000 ft) and works remotely. The radar is particularly important in situations when the pilot has limited sight (because of fog, rain, etc.).
  • In this situation, the radar has to provide the approach controller with maximum quality radar display complemented by computer evaluation of speed, deviations from glide path (or glide slope) and course line, the distance from the previously approaching aircraft, etc.
  • Traffic controller provides highly accurate navigational guidance in azimuth and elevation to a pilot so that he can keep his aircraft aligned with the extended centreline of the runway.
  • The accuracy of the radar permits lower minimum descent than a non-precision approach. Thus, the pilot has a better chance of seeing the ship or airfield in bad weather conditions.
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