Question
With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements :
1. IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits.
2. IRNSS covers entire India and about 5500 sq. km beyond its borders.
3. India will have its own satellite navigation system with full global coverage by the middle of 2019.
Which of the statements given above is/are correct?
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) None
Answer:
A
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Explanation:
Statement 1 is correct. IRNSS, also known as NavIC (Navigation with Indian Constellation), consists of a constellation of seven satellites. However, all seven satellites are placed in geosynchronous orbits, not geostationary orbits. Geosynchronous orbit means the satellites have an orbital period matching the rotation of the Earth, while geostationary orbit means the satellites are fixed at a specific point above the Earth's equator.
Statement 2 is incorrect. IRNSS provides navigation coverage over the Indian region and about 1,500 kilometers beyond its borders. It does not cover the entire India and 5500 sq. km beyond its borders as mentioned in statement 2.
Statement 3 is incorrect. India does not have plans to achieve full global coverage with its own satellite navigation system by the middle of 2019. IRNSS/NavIC is primarily intended to provide regional navigation services in the Indian Ocean region.