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UPSC Prelims 2025 GS Paper 1, question 94

Topic: Science and technology

Q94

GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?

I. It is designed to provide additional accuracy and integrity.

II. It will allow more uniform and high quality air traffic management.

III. It will provide benefits only in aviation but not in other modes of transportation.

Select the correct answer using the code given below.

  1. (a) I, II and III
  2. (b) II and III only
  3. (c) I only
  4. (d) I and II onlyCorrect answer

Solution.

Answer: (d) I and II only

  1. Statements I and II are correct: jointly developed by ISRO and the Airports Authority of India (AAI), GAGAN (GPS-Aided Geo Augmented Navigation) corrects ionospheric and orbital GPS errors to provide enhanced accuracy, integrity, and availability for uniform, high-quality air traffic management.
  2. Statement III is incorrect: beyond civil aviation, GAGAN provides navigation and positioning benefits across railways, maritime shipping, highways, precision agriculture, and disaster management.