The Indian Regional Navigational Satellite System (IRNSS) is India's independent regional navigational satellite system. The system consists of 9 satellites - 3 in geostationary orbit and 4 in geosynchronous orbit. IRNSS will provide two types of services - Special Positioning Service and Precision Service. It will provide navigational coverage for India and an area up to 1,500-2,000 km around it. IRNSS will benefit various sectors including transportation, mapping, defense, and more.

1. INDIAN REGIONAL
NAVIGATIONAL
SATELLITE SYSTEM
By
N.YELLENDER REDDY,
12H51A05F6,
TEAM: CB6.
GUIDE:
V. VENKATAIAH

2. 1. THE BEGINNING
2. WHY?
3. SERVICES
4. ARCHITECTURE
5. SATELLITES
6. IRNSS COVERAGE
7. BENEFITS

3. • Approved by Government of India in May 2006.
• The total cost of the project is expected to be ₹1420 crore (US$209 million).
• the full system comprises nine satellites.
• 3 satellites in GEO orbit.
• 4 satellites in GSO orbit.
• 2 on the ground as stand-by.
• Third country in the world to have it’s own navigational system.

4. ss
• Access to foreign government-controlled global navigation satellite systems (GPS)
is not guaranteed in hostile situations.
• Indian military depending on American GPS during Wars.

5. • Special Positioning Service (SPS)
An open service without encryption and Restricted Service.
• Precision Service (PS)
An authorized with encryption are the basic services offered by IRNSS.

6. ARCHITECTURE
The IRNSS architecture mainly consists of:
• Space Segment
• Ground Segment
• User Segment
.

7. ARCHITECTURE
.

8. IRNSS SPACE SEGMENT
Based on various considerations the minimum number of satellites required for IRNSS
constellation is worked out to be 7 (3 GEO and 4 GSO). The 3 GEOs will be located
at 32.5ºE, 83º E and 131.5º E and the 4 GSOs have their longitude crossings 55º E and
111.75º E.

9. IRNSS GROUND SEGMENT
Ground Segment is responsible for the maintenance and operation of the IRNSS
constellation. The Ground segment comprises of:
• ISRO Navigation Centre
• IRNSS Spacecraft Control Facility
• IRNSS Range and Integrity Monitoring Stations
• IRNSS Network Timing Centre
• IRNSS CDMA Ranging Stations
• Laser Ranging Stations
• Data Communication Network

10. USER SEGMENT
The User segment mainly consists of:
• Single frequency IRNSS receiver capable of receiving SPS signal at L5 or S band
frequency.
• A dual frequency IRNSS receiver capable of receiving both L5 and S band
frequencies.
• A receiver compatible to IRNSS and other GNSS signals.

11. SATELLITES
There are 9 satellites in total
• 3 satellites in GEO orbit.
• 4 satellites in GSO orbit.
• 2 on the ground as stand-by.

12. IRNSS-1A
IRNSS-1A was the first navigational satellite in the Indian Regional Navigation
Satellite System series of satellites to be placed in geosynchronous orbit. The satellite
was launched on-board PSLV-C22 on 1 July 2013 from the Satish Dhawan Space
Centre at Sriharikota. It will provide IRNSS services to the Indian public, which would
be a system similar to Global Positioning System (GPS) but only for India and the
region around it.
IRNSS-1B
IRNSS-1B is the second out of seven in the Indian Regional Navigation Satellite
System. It was very precisely and successfully placed in its orbit through PSLV-C24
rocket on 4 April 2014. The satellite will provide navigation, tracking and mapping
services.

13. IRNSS-1C
IRNSS-1C is the third out of seven in the Indian Regional Navigation Satellite
System series of satellites. The satellite was successfully launched using India's
PSLV-C26 from the Satish Dhawan Space Centre at Sriharikota on 16 October 2014.
The navigational system so developed will be a regional one targeted towards South
Asia. The satellite will provide navigation, tracking and mapping services.
IRNSS-1D
IRNSS-1D is the fourth out of seven in the Indian Regional Navigation Satellite
System series of satellites system. It was successfully launched using India's PSLV-C27
on 28 March 2015. The satellite will provide navigation, tracking and mapping
services.

14. IRNSS-1E
IRNSS-1E is the fifth out of seven in the Indian Regional Navigation Satellite
System series of satellites system. It was successfully launched on January 20, 2016
using India's PSLV-C31. The satellite will provide navigation, tracking and mapping
services
IRNSS-1F & IRNSS-1G
IRNSS-1F will be the sixth and IRNSS-1G will be seventh of the Indian Regional
Navigation Satellite System series of satellites. Their launches are planned for March
and April 2016. Satellites slated to be launched to provide navigational services to the
region.

15. IRNSS COVERAGE
1,500-2,000 kms around Indian land-mass
SAARC countries can use IRNSS navigation system
SAARC members countries included are
1. India.
2. Afghanistan.
3. Bangladesh.
4. Bhutan.
5. Maldives.
6. Nepal.
7. Pakistan.
8. Sri Lanka.

16. BENEFITS FROM IRNSS
1. NAVIGATION
• Boats and ships
• Heavy Equipment
• Cyclists
• Air navigation
• Automobiles
• Hikers, climbers

17. BENEFITS FROM IRNSS
2. Surveying and Mapping
• Archaeology
• Geophysics and geology
• Surveying
• Mapping and geographic information systems

18. BENEFITS FROM IRNSS
3.OTHER USES
• Military Precision-guided munitions
• Mobile Satellite Communications
• GPS tracking
• Weather Prediction
• Skydiving
• Social Networking