Navic

 NAVIC (Navigation with Indian Constellation) is an Operational name of IRNSS.
Independent Indian Regional Navigation Satellite System
provide accurate position information service to users in India as well as the region extending up to 1500 km from its boundary.
In this Programme there are two levels of service/access to data
1. Standard Positioning Service (SPS)
-which is provided to all the users
2. Restricted Service (RS)
- which is an encrypted service provided only to the authorised users like Indian Security forces.
• NAVIC has total of 7 satellites of which 3 are in GEO (GeoStationary) orbit and 4 are in GSO (GeoSynchronous) orbit.

1. NAVIC NAV igation with I ndian C onstellation Presented By: VELICHETI UDAY KUMAR

2. CONTENTS Introduction Why launched? Other navigation satellite systems The beginning Architecture Satellites Navic coverage Applications /Benefits conclusion

3. Introduction The indian regional navigation satellite system or IRNSS In April 2016,with the last launch of constellation satellite , IRNSS was renamed “NAVIC” by indian prime minister ‘Narendra modi’. NAVIC – Navigation with Indian Constellation NAVIC means “sailor” or “navigator” in Sanskrit, Hindi and many other indian languages. An autonomous regional satellite navigation system. provide accurate real –time positioning and timing services over India and the region extending to 1500 km (930 miles ) around india .

4. Why launched? Access to foreign government controlled ‘Global Navigation Satellite Systems ‘ is not guaranteed in hostile situations As happened to the Indian Military in 1999 when it was dependent on the American GPS during the kargil war.

5. Other Navigation satellite system USA – Global positioning system (GPS) RUSSIA – Glonass EU- Gallileo CHINA – Beiduo(BDS) INDIA – NAVIC (IRNSS)

6. The Beginning Approved by government of india in May 2006 The total cost of the project is expected to be Rs 1420 crores The full system comprises 9 satellites 3 satellites in GEO orbit 4 satellites in GSO orbit 2 on the ground as stand by

7. GEO Vs GSO .  

8. Architecture The NAVIC architecture mainly consists of Space segment Ground segment User segment

9. Space Segment Minimum number of satellites required for IRNSS constellation is worked out to be 7 (3 geo and 4 gso ). The 3 geo will be located at 32.5°, 83° and 131.5° East. and the 4 gso have their longitude crossings 55° east and 111.75º East (two in each plane ).

10. Ground segment Ground segment is responsible for the maintenance and operation of the IRNSS constellation. The ground segment comprises of IRNSS Space Craft Control Centre (SCC) IRNSS Navigation Centre (INC) IRNSS TTC & Uplinking Stations (IRTTC) IRNSS Range and Integrity Monitoring Stations (IRIMS) IRNSS Timing Centre (IRNWT) IRNSS CDMA Ranging Stations (IRCDR) Laser Ranging Station (ILRS) Data Communication Network (IRDCN)

11. User segment The user segment consists of IRNSS receivers operating in – Single Frequency ( L5 or S band) – Dual Frequency (L5 and S band) • Single frequency and dual frequency receivers shall receive both SPS and RS signals. SPS is for civilian users. RS signal is meant for authorised users .

12. NAVIC navigation signals BAND SPS RS L5 (1176.45 MHz) BPSK BOC(5,2) S band(2492.028 MHz) BPSK BOC(5,2) CDMA Ranging frequencies up link : 6712.0 MHz(BW 24 MHz) Down link : 3412.0 MHz(BW 24 MHz)

13. IRNSS Space Craft

14. Satellites IRNSS-1A : Built at ISRO satellite centre , Bangalore . It has a lift mass of 1380 kg and carries a navigation pay load and c- band ranging transponder, which operate in L5 band(1176.45 MHz)and s band(2492.028)MHz . IRNSS-1B : It was placed in geo synchronous orbit on 4 april 2014 aboard the PSLV-C24 rocket from sathish dawan space centre , sriharikota. The IRNSS -1B satellites weighs 1,432 kg and has two payloads : navigation payload and cdma ranging payload in addition with a laser retro-reflector.

15. IRNSS-1C: It was placed in GSO on 16 oct 2014 aboard PSLV-C26 from the sathish dawan space centre,sriharikota IRNSS-1C satellite has two payloads :navigation payload and cdma ranging payload The navigation system so developed will be a regional one targeted towards south asia . The both 1B and 1C design of the payload makes the IRNSS system inter-operable and compatible with GPS and Galileo. . The satellite will provide Navigation ,tracking and mapping services

16. IRNSS 1-D : It is fourth out of seven in the IRNSS satellite system. It was successfully launched using indian PSLV –C27 on 28 march 2015 . IRNSS 1-E: It is the fifth IRNSS satellite. it was launched on 20 january 2016 using indian PSLV-C31. A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite It carries two types of payloads – navigation and cdma ranging.

17. IRNSS-1F : It is the sixth IRNSS satellite . It was launched on 10 march 2016 using indian PSLV-c32. IRNSS-1G: It is the seventh IRNSS satellite. It was launched on 28 april 2016 using indian PSLV-C33,which conclude the setting up of the IRNSS .

18. Orbital Location Geosynchronous / Geostationary Payload Navigation Payload in S and L5 bands Ranging Payload in C Band Power 1600 Watts Mass Between 1350-1450 Kg Mission Life 10 Years

19. Orbit IRNSS spacecraft Longitude (E) Inclination Launch date 1A 55.0º 29º (±2) July 1, 2013 1B 55.0º 29º (±2) April 4, 2014 1C 83.0º 29º (±2) October 15, 2014 1D 111.75 º 29º (±2) March 27, 2015 1E 111.75 º 29º (±2) January 20, 2016 1F 32.5º ± 5º March 10, 2016 1G 129.5º ± 5º April 28, 2016

20. Clock failure In 2017 it was announced that three rubidium atomic clocks on board IRNSS -1A have all failed . This rendors the satellite somewhat redundant and requires replacement . Although the satellite still performs other functions ,the data will be coarse ,and this cannot be used for accurate measurement. Isro plans to replace it with IRNSS-1H in the second half of 2017.

21. IRNSS Coverage 1,500-2,000 kms around indian land-mass SAARC countries can use IRNSS navigation system.SAARC members countries included are India Afghanistan Bangladesh Bhutan Maldives Nepal Pakistan Srilanka

22. GPS Vs NAVIC More accurate than the American GPS system. Unlike American GPS, Isro is recommending a small additional hardware in handheld devices that can receive S-Band signals from IRNSS satellites and inclusion of a code in the phone software to receive L-Band signals. Both these L and S-band signals received are being calculated by a special embedded software which reduces the errors caused by atmospheric disturbances significantly. This, in turn, gives a superior quality location accuracy than the American GPS system

23. Satellite view

24. Applications/Benefits Navigation Surveying and mapping - Boats and ships -Hikers,climbers -Air navigation -cyclists -Automobiles -heavy equipments -archeology -geophysics and geology -surveying -mapping and geographic information systems Other uses -military precision -mobile satellite communications -GPS tracking -weather prediction -social networking

25. Conclusion  NAVIC (Navigation with Indian Constellation) is an Operational name of IRNSS. Independent Indian Regional Navigation Satellite System provide accurate position information service to users in India as well as the region extending up to 1500 km from its boundary. In this Programme there are two levels of service/access to data 1. Standard Positioning Service (SPS) -which is provided to all the users 2. Restricted Service (RS) - which is an encrypted service provided only to the authorised users like Indian Security forces. • NAVIC has total of 7 satellites of which 3 are in GEO (GeoStationary) orbit and 4 are in GSO (GeoSynchronous) orbit.

26.  ANY QUESTIONS/QUERIES???

27. Thank You!