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UPSC CSE 2025 · PYQ · Science & Technology / GAGAN Navigation System · medium

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 only✓ Correct

Explanation

GAGAN (GPS Aided Geo Augmented Navigation) is a Satellite-Based Augmentation System (SBAS) jointly developed by ISRO and the Airports Authority of India. Statement I is correct: GAGAN is designed to provide additional accuracy, integrity, continuity, and availability over and above standard GPS signals. Statement II is correct: It enables uniform and high-quality air traffic management over Indian airspace. Statement III is incorrect: While GAGAN is primarily designed for civil aviation, its applications extend to other transportation modes such as railways, maritime navigation, road transport, surveying, telecom, and disaster management. Hence, only statements I and II are correct.
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