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?

The correct option is 1 only.

Let us analyze each statement step-by-step with reference to the Indian Regional Navigation Satellite System (IRNSS), officially operational as NavIC (Navigation with Indian Constellation):

1. Statement 1: "IRNSS has three satellites in geostationary and four satellites in geosynchronous orbits."
This statement is correct.
The IRNSS space segment consists of a constellation of 7 satellites in total:
- 3 satellites are placed in Geostationary Earth Orbit (GEO).
- 4 satellites are placed in Inclined Geosynchronous Earth Orbit (IGSO).

2. Statement 2: "IRNSS covers entire India and about 5500 sq. km beyond its borders."
This statement is incorrect.
IRNSS is designed to provide accurate positioning information services to users in India as well as the region extending up to 1500 km beyond its borders (not 5500 sq. km).

3. Statement 3: "India will have its own satellite navigation system with full global coverage by the middle of 2019."
This statement is incorrect.
IRNSS is a regional satellite navigation system, not a global system (unlike GPS or GLONASS). There was no such operational target to convert IRNSS into a system with full global coverage by 2019.

Conclusion: Since only Statement 1 is correct, the correct answer is 1 only.