Indian Positioning Sattelite launched by ISRO

1. IRNSS
Indian Regional Navigation Satellite System

2. Indian Regional Navigation Satellite
System
 Country of origin INDIA
 Operator(s) ISRO
 Type MILITARY
COMMERCIAL
 Total satellites 7
 Satellites in orbit 7
 First launch 1 July 2013
 Last launch 28 April 2016 12:50 PM
 Total launches 7 (All
Successful)

3. ABOUT
 The Indian Regional Navigation Satellite
System or IRNSS with an operational name of NAVIC (Sailor
or Navigator in Sanskrit,Hindi and many other Indian
languages) which stands for NAVigation
with Indian Constellation is an Indian developed Navigation
Satellite System that is used to provide accurate real-time
positioning and timing services over India and region
extending to 1500 km around India.
 The fully deployed NAVIC system consists of 3 satellites
in GEO orbit and 4 satellites in GSO orbit, approximately
36,000 km altitude above earth surface. However, the full
system comprises nine satellites, including two on the ground
as stand-by. The requirement of such a navigation system is
driven because access to foreign government-
controlledglobal navigation satellite systems is not
guaranteed in hostile situations, as happened to the Indian
military depending on AmericanGPS during the Kargil War

4. IRNSS
 As part of the project, ISRO opened a new satellite navigation
center within the campus of ISRO Deep Space Network (DSN)
atByalalu, in Karnataka on 28 May 2013. A network of 21 ranging
stations located across the country will provide data for the orbital
determination of the satellites and monitoring of the navigation
signal.
 A goal of complete Indian control has been stated, with the space
segment, ground segment and user receivers all being built in India.
Its location in low latitudes facilitates a coverage with low-
inclination satellites. Three satellites will be in geostationary
orbit over the Indian Ocean. Missile targeting could be an important
military application for the constellation.[10]
 The total cost of the project is expected to be 1,420
crore (US$211 million), with the cost of the ground segment
being 300 crore(US$45 million). Each satellites costing 150
crore (US$22 million) and the PSLV-XL version rocket costs
around130 crore(US$19 million) . The seven rockets would involve
an outlay of around 910 crore (US$135 million). The NAVIC signal
has been released for evaluation in Sep 2014

5. TIME-FRAME
 In April 2010, it was reported that India plans to start
launching satellites by the end of 2011, at a rate of
one satellite every six months. This would have made
the NAVIC functional by 2015. But program was
delayed. India also launched 3 new satellites into
space to supplement this.
 Seven satellites with the prefix "IRNSS-1" will
constitute the space segment of the IRNSS. IRNSS-
1A, the first of the seven satellites, was launched on 1
July 2013. IRNSS-1B was launched on 4 April 2014
on board the PSLV-C24 rocket. The satellite has been
placed in geosynchronous orbit. IRNSS-1C was
launched on 16 October 2014, IRNSS-1D on 28
March 2015,IRNSS-1E on 20 January 2016,IRNSS-
1F on 10 March 2016 and IRNSS-1G was launched
on 28 April 2016.

6. DESCRIPTION
 The system consists of a constellation of seven satellites and a
support ground segment. Three of the satellites in the constellation are
located in geostationary orbit (GEO) at 32.5° East, 83° East, and
131.5° East longitude. The other four are inclined geosynchronous
orbit (GSO). Two of the GSOs cross the equator at 55° East and two at
111.75° East. The four GSO satellites will appear to be moving in the form
of an "8". In addition, various ground-based systems will control, track
orbits, check integration and send radio signals to the satellites. The land-
based Master Control Center (MCC) will run navigational software.
 NAVIC signals will consist of a Standard Positioning Service and a
Precision Service. Both will be carried on L5 (1176.45 MHz) and S band
(2492.028 MHz). The SPS signal will be modulated by a
1 MHz BPSK signal. The Precision Service will use BOC(5,2). The
navigation signals themselves would be transmitted in the S-
band frequency (2–4 GHz) and broadcast through a phased array antenna
to maintain required coverage and signal strength. The satellites would
weigh approximately 1,330 kg and their solar panels generate 1,400 watts.
The system is intended to provide an absolute position accuracy of better
than 10 meters throughout Indian landmass and better than 20 meters in
the Indian Ocean as well as a region extending approximately 1,500 km
around India.

7. SATELLITES
 IRNSS-1A
 IRNSS-1B
 IRNSS-1C
 IRNSS-1D
 IRNSS-IE
 IRNSS-IG

8. 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.
 It was built at ISRO Satellite Centre, Bangalore,
costing 125 crore (US$19 million). It has a lift-off mass
of 1380 kg, and carries a navigation payload and a C-
band ranging transponder, which operates in L5
band (1176.45 MHz) and S band (2492.028 MHz).
 An optimised I-1K bus structure with a power
handling capability of around 1600 watts is used and
is designed for a ten-year mission. The satellite was
launched on-board PSLV-C22 on 1 July 2013 from
the Satish Dhawan Space Centre at Sriharikota.

9. 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.

10. IRNSS-IC
 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 theSatish Dhawan
Space Centre at Sriharikota on 16 October
2014 at 1:32 am.

11. 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 at 5:19 pm.

12. IRNSS-IE
 IRNSS-1E is the fifth out of seven in the Indian
Regional Navigation Satellite System series of
satellites system.
 It was successfully launched on 20 January
2016 using India's PSLV-C31 at 9:31 am.

13. IRNSS-IF
 IRNSS-1F is the sixth out of seven in the
Indian Regional Navigation Satellite System
series of satellites system.
 It was successfully launched on 10 March
2016 using India's PSLV-C32 at 4:01 pm.

14. IRNSS-1G
 IRNSS-1G is the seventh and final of the
IRNSS series of satellites system. It was
successfully launched on 28 April 2016 at
12:51pm IST using India's PSLV-C33.
 The successful launch of this satellite
concludes the setting up of India's first
indigenous Regional Navigation Satellite
System.[