Consider the following statements about IRNSS: 1. The IRNSS constellation consists of seven satellites, of which three are placed in geostationary orbit (GEO) and four in inclined geosynchronous orbit (GSO). 2. IRNSS provides two types of services: Standard Positioning Service (SPS) available to all users, and Restricted Service (RS) which is encrypted and only available to authorized users. 3. The IRNSS provide positioning coverage with accuracy better than 20 meters within India and up to 1,500 km around its borders. Which of the statements given above is/are correct? |ForumIAS

Q. Consider the following statements about IRNSS:
1.The IRNSS constellation consists of seven satellites, of which three are placed in geostationary orbit (GEO) and four in inclined geosynchronous orbit (GSO).
2.IRNSS provides two types of services: Standard Positioning Service (SPS) available to all users, and Restricted Service (RS) which is encrypted and only available to authorized users.
3.The IRNSS provide positioning coverage with accuracy better than 20 meters within India and up to 1,500 km around its borders.
Which of the statements given above is/are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2, and 3

Answer: D

Notes:

Explanation:

Statement 1 is correct: The IRNSS constellation has 7 satellites, 3 in geostationary orbit and 4 in inclined geosynchronous orbit at 29° inclination.

Statement 2 is correct: IRNSS offers Standard Positioning Service (SPS) for civilian use and a Restricted Service (RS) for authorized users with encrypted signals.

Statement 3 is correct: It uses L5 and S bands to provide high-accuracy regional navigation within India and the surrounding region (up to about 1,500 km), with position accuracy better than 20 meters.

Source: IE

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