IRNSS-1G: Difference between revisions

What links here Related changes Page information Get shortened URL Printable version
Created by Niterurea
Last edited January 21, 2026
Talk
VisualWikitext
>Niterurea
Added photo
 
No edit summary
 
(2 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{Short description|Indian navigation satellite}}
{{use dmy dates|date=January 2014}}
{{use dmy dates|date=January 2014}}
{{use Indian English|date=January 2014}}
{{use Indian English|date=January 2014}}
{{Infobox spaceflight
{{Infobox spaceflight
| name                  = PSLV-C33/IRNSS-1G
| name                  = IRNSS-1G
| image                = IRNSS Series 1.jpg
| image                = IRNSS Series 1.jpg
| image_caption        =  
| image_caption        =  
Line 10: Line 11:
| COSPAR_ID            =  
| COSPAR_ID            =  
| SATCAT                = 41469
| SATCAT                = 41469
| mission_duration      = 12 years
| mission_duration      = Planned: 12 years<br />Elapsed: {{time interval|28 April 2016|show=ymd|sep=,}}


<!--Spacecraft properties-->
<!--Spacecraft properties-->
Line 22: Line 23:


<!--Launch details-->
<!--Launch details-->
| launch_date          = {{start date|2016|04|28|12|50|00|7=UTC+05:30}}
| launch_date          = {{start date|2016|04|28|12|50|00|7=+05:30}}
| launch_rocket        = [[Polar Satellite Launch Vehicle|PSLV-XL]] C33
| launch_rocket        = [[Polar Satellite Launch Vehicle|PSLV-XL]] C33
| launch_site          = [[Satish Dhawan Space Centre|Satish Dhawan]] ([[Satish Dhawan Space Centre First Launch Pad|First]])
| launch_site          = [[Satish Dhawan Space Centre|Satish Dhawan]] ([[Satish Dhawan Space Centre First Launch Pad|First]])
Line 38: Line 39:
| orbit_regime          = Geosynchronous Orbit (GSO)
| orbit_regime          = Geosynchronous Orbit (GSO)
| orbit_periapsis      = {{convert|35780.961|km|abbr=on}}<ref name=
| orbit_periapsis      = {{convert|35780.961|km|abbr=on}}<ref name=
"TLE">{{cite web | url=http://www.celestrak.com/cgi-bin/TLE.pl?CATNR=41469 | title=NORAD Catalog Number 41469 | publisher=NORAD | access-date=2 June 2017}}</ref>
"TLE">{{cite web | url=http://www.celestrak.com/cgi-bin/TLE.pl?CATNR=41469 | title=NORAD Catalog Number 41469 | publisher=NORAD | access-date=2 June 2017 }}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
| orbit_apoapsis        = {{convert|35796.200|km|abbr=on}}<ref name=
| orbit_apoapsis        = {{convert|35796.200|km|abbr=on}}<ref name=
"TLE" />
"TLE" />
Line 46: Line 47:
| apsis                = gee
| apsis                = gee


| programme            = [[Polar Satellite Launch Vehicle]]
| programme            = [[NavIC]]
| previous_mission      = [[PSLV-C32]]
| previous_mission      = [[IRNSS-1F]]
| next_mission          = [[PSLV-C34]]
| next_mission          = [[IRNSS-1H]]


}}
}}


'''GISIS''' was the seventh and final<ref name="Launch" /> of the [[Indian Regional Navigation Satellite System]] (IRNSS) series of satellites after [[IRNSS-1A]], [[IRNSS-1B]], [[IRNSS-1C]], [[IRNSS-1D]], [[IRNSS-1E]] and [[IRNSS-1F]]. This system of satellites will provide navigational services to the Indian region. The satellite was placed in geosynchronous orbit successfully on April 28, 2016 at 12:50–pm [[Indian Standard Time|IST]].<ref name="Launch" />
'''IRNSS-1G''' was the seventh and final<ref name="Launch" /> of the [[Indian Regional Navigation Satellite System]] (IRNSS) series of satellites after [[IRNSS-1A]], [[IRNSS-1B]], [[IRNSS-1C]], [[IRNSS-1D]], [[IRNSS-1E]] and [[IRNSS-1F]]. This system of satellites will provide navigational services to the Indian region. The satellite was launched successfully on 28 April 2016 at 07:20 UTC.<ref name="Launch" />
 
IRNSS-1G along IRNSS-1A is being used only for NavIC's short message broadcast service and not for navigation.<ref name=":11">{{cite web|title=Annual Report 2019-20|url=https://www.isro.gov.in/sites/default/files/flipping_book/annual_report_2019-20_english/index.html#50|access-date=5 March 2020|publisher=Department of Space|archive-date=6 April 2020|archive-url=https://web.archive.org/web/20200406131804/https://www.isro.gov.in/sites/default/files/flipping_book/annual_report_2019-20_english/index.html#50|url-status=dead}}</ref><ref name="ar-2021">{{cite web|title=ANNUAL REPORT 2020-2021|url=https://www.isro.gov.in/sites/default/files/anual_report_2020-2021_english.pdf|access-date=6 March 2021|publisher=ISRO|archive-date=25 April 2021|archive-url=https://web.archive.org/web/20210425173704/https://www.isro.gov.in/sites/default/files/anual_report_2020-2021_english.pdf|url-status=dead}}</ref>


== Launch ==
== Launch ==
The satellite was launched from the [[Satish Dhawan Space Centre First Launch Pad|First Launch Pad (FLP)]] of [[Satish Dhawan Space Centre]], [[Sriharikota]] on board [[Polar Satellite Launch Vehicle|PSLV-C33]].<ref name="Launch">{{Cite news|url =http://www.thehindu.com/sci-tech/science/irnss-launch-indias-own-regional-navigation-satellite-system-takes-shape/article8531388.ece|title = India launches seventh navigation satellite, to get its own GPS |date = April 28, 2016|work = The Hindu|access-date = April 28, 2016}}</ref> The countdown of the launch had begun 51:30 hours before at 9:20&nbsp;a.m. IST on 25 April.<ref name="countdown" />
The satellite was launched from the [[Satish Dhawan Space Centre First Launch Pad|First Launch Pad (FLP)]] of [[Satish Dhawan Space Centre]], [[Sriharikota]] on board [[Polar Satellite Launch Vehicle|PSLV-C33]] XL on 28 April 2016 at 12:50 PM [[Indian Standard Time|IST]].<ref name="Launch">{{Cite news|url =http://www.thehindu.com/sci-tech/science/irnss-launch-indias-own-regional-navigation-satellite-system-takes-shape/article8531388.ece|title = India launches seventh navigation satellite, to get its own GPS |date = April 28, 2016|work = The Hindu|access-date = April 28, 2016}}</ref><ref>{{cite web|title=PSLV-C33/IRNSS-1G|url=http://www.isro.gov.in/launcher/pslv-c33-irnss-1g|access-date=28 April 2016|publisher=ISRO|archive-date=28 April 2016|archive-url=https://web.archive.org/web/20160428170026/http://www.isro.gov.in/launcher/pslv-c33-irnss-1g|url-status=dead}}</ref> The countdown of the launch had begun 51:30 hours before at 9:20&nbsp;AM IST on 25 April 2016.<ref name="countdown" />


After the launch of IRNSS-1G the Indian government named the IRNSS system as NAVIC (Navigation Indian Constellation).
After the launch of IRNSS-1G the Indian government named the IRNSS system as NAVIC ('''Nav'''igation with '''I'''ndian '''C'''onstellation).<ref>{{Cite web|title=PSLV-C33 Successfully Launches India's Seventh Navigation Satellite IRNSS-1G - ISRO|url=https://www.isro.gov.in/update/28-apr-2016/pslv-c33-successfully-launches-indias-seventh-navigation-satellite-irnss-1g|access-date=2021-11-01|website=www.isro.gov.in|archive-date=1 November 2021|archive-url=https://web.archive.org/web/20211101171131/https://www.isro.gov.in/update/28-apr-2016/pslv-c33-successfully-launches-indias-seventh-navigation-satellite-irnss-1g|url-status=dead}}</ref>


== Specifications ==
== Specifications ==
The satellite is designed for 12 years of life.<ref name="countdown">{{cite web | url=http://www.thehindubusinessline.com/news/science/countdown-for-irnss1g-launch-begins-at-sriharikota/article8523638.ece | title=Countdown for IRNSS-1G launch begins at Sriharikota | work=[[The Hindu]] | date=26 April 2016 | access-date=28 April 2016 | author=PTI}}</ref> It has a lift-off mass of {{Convert|1425|kg}} and dry mass of {{Convert|598|kg}}.<ref name=
'''Mission life:''' 12 years (planned).<ref name="countdown">{{cite web | url=http://www.thehindubusinessline.com/news/science/countdown-for-irnss1g-launch-begins-at-sriharikota/article8523638.ece | title=Countdown for IRNSS-1G launch begins at Sriharikota | work=[[The Hindu]] | date=26 April 2016 | access-date=28 April 2016 | author=PTI}}</ref>  
"Spec">{{cite web | url=http://www.isro.gov.in/sites/default/files/pslv-c33_brochure.pdf | title=PSLV-C33 - IRNSS-1G Specifications | publisher=ISRO | access-date=28 April 2016}}</ref> The ranging payload of IRNSS-1G consists of a C-band transponder (automatic receivers and transmitters of radio signals) which facilitates accurate determination of the range of the satellite.<ref>{{Cite news|url =http://www.business-standard.com/article/current-affairs/isro-launches-rocket-carrying-india-s-seventh-navigation-satellite-116042800308_1.html|title = 'Isro launches rocket carrying India's seventh navigation satellite'|date = April 28, 2016|work = Business Standard|access-date = April 28, 2016}}</ref> It would operate in [[L band|L-5]] and [[S band]] spectrums and also has a [[Rubidium atomic clock]].<ref>{{cite web | url=http://www.isro.gov.in/Spacecraft/irnss-1g | title=IRNSS-1G | work=ISRO | access-date=28 April 2016}}</ref> Special thermal control systems are used for key components like this clock. Two panels of solar cells are used to generate 1660W of energy and one Lithium-ion 90A-hr battery is used.<ref name="Spec"/> The satellite is placed in an orbit at an altitude of {{convert|35788.5|km}} at 129.5 deg East longitude.<ref name="Spec"/><ref>{{cite web | url=http://indiatoday.intoday.in/story/indias-own-navigation-satellite-irnss-1g-launched-all-you-need-to-know-about-it/1/653698.html | title=India's own navigation satellite IRNSS-1G launched: All you need to know about it | work=[[India Today]] | date=28 April 2016 | access-date=28 April 2016 | author=Sangeeta Ojha}}</ref> It cost approximately {{INRConvert|125|c}}.<ref name="Desi">{{cite web | url=http://economictimes.indiatimes.com/news/science/irnss-desi-gps-to-liberate-india-from-dependence-on-us-russia/articleshow/52058262.cms | title=IRNSS: Desi GPS to liberate India from dependence on US, Russia | work=Economic Times | date=1 May 2016 | access-date=2 May 2016 | author=Vanita Srivastava}}</ref>
 
'''Lift-off mass:'''{{Convert|1425|kg}}  
 
'''Dry mass:''' {{Convert|598|kg}}.<ref name="Spec">{{cite web | url=http://www.isro.gov.in/sites/default/files/pslv-c33_brochure.pdf | title=PSLV-C33 - IRNSS-1G Specifications | publisher=ISRO | access-date=28 April 2016 | archive-date=25 April 2016 | archive-url=https://web.archive.org/web/20160425202808/http://www.isro.gov.in/sites/default/files/pslv-c33_brochure.pdf | url-status=dead }}</ref>
 
'''Payload:''' [[Code-division multiple access|CDMA]] ranging payload in [[C band (IEEE)|C band]].<ref>{{Cite news|url =http://www.business-standard.com/article/current-affairs/isro-launches-rocket-carrying-india-s-seventh-navigation-satellite-116042800308_1.html|title = 'Isro launches rocket carrying India's seventh navigation satellite'|date = April 28, 2016|work = Business Standard|access-date = April 28, 2016}}</ref><ref name=":0">{{Cite web|title=SALIENT FEATURES OF IRNSS 1G|url=https://www.ursc.gov.in/navigation/html/irnss-1g.jsp|access-date=2021-11-01|website=www.ursc.gov.in}}</ref> Navigation payload in [[L band|L-5]] and [[S band]] spectrums and [[Rubidium atomic clock|Rubidium atomic clocks]].<ref>{{cite web | url=http://www.isro.gov.in/Spacecraft/irnss-1g | title=IRNSS-1G | work=ISRO | access-date=28 April 2016 | archive-date=24 April 2016 | archive-url=https://web.archive.org/web/20160424010008/http://www.isro.gov.in/Spacecraft/irnss-1g | url-status=dead }}</ref>  
 
'''Power:''' Two [[Multi-junction solar cell|triple-junction solar panels]] to generate 1660W of energy and one Lithium-ion 90A-hr battery is used.<ref name="Spec" />
 
'''Propulsion:''' [[Monomethylhydrazine|MMH]]/[[Mixed oxides of nitrogen|MON3]] based bipropellant system with 12×22N [[Spacecraft attitude control|Attitude control]] thrusters and one 440N [[Liquid apogee engine|LAM]].<ref name=":0" />
 
'''Orbit:''' [[Geosynchronous orbit]] at 129.5° East longitude with 5° inclination.<ref name="Spec" /><ref>{{cite web | url=https://www.indiatoday.in/india/story/indias-own-navigation-satellite-irnss-1g-launched-all-you-need-to-know-about-it-320437-2016-04-28 | title=India's own navigation satellite IRNSS-1G launched: All you need to know about it | work=[[India Today]] | date=28 April 2016 | access-date=28 April 2016 | author=Sangeeta Ojha}}</ref>  


The "XL" version of PSLV was used with six strap-ons for the launch. Each strap-on used {{convert|12|MT}} of propellant. ISRO has successfully used PSLV 34 times and the XL version 12 times before the launch of IRNSS-1G.<ref>{{cite web | url=http://www.isro.gov.in/launcher/pslv-c33-irnss-1g | title=PSLV-C33/IRNSS-1G | publisher=ISRO | access-date=28 April 2016}}</ref>
'''Cost:''' Approximately {{INRConvert|125|c}}.<ref name="Desi">{{cite web | url=http://economictimes.indiatimes.com/news/science/irnss-desi-gps-to-liberate-india-from-dependence-on-us-russia/articleshow/52058262.cms | title=IRNSS: Desi GPS to liberate India from dependence on US, Russia | work=Economic Times | date=1 May 2016 | access-date=2 May 2016 | author=Vanita Srivastava}}</ref>


{{multiple image
{{multiple image
Line 80: Line 94:
| image5 = Animation of IRNSS orbit - Earth fixed - polar view.gif
| image5 = Animation of IRNSS orbit - Earth fixed - polar view.gif
| caption5 = [[ECEF|Earth fixed frame]] - Polar view
| caption5 = [[ECEF|Earth fixed frame]] - Polar view
| footer = {{legend2| RoyalBlue | Earth}}{{·}}{{legend2| magenta |[[IRNSS-1B]] }}{{·}}{{legend2| lime |[[IRNSS-1C]] }}{{·}}{{legend2| Cyan |[[IRNSS-1E]] }}{{·}}{{legend2|Gold|[[IRNSS-1F]] }}{{·}}{{legend2| OrangeRed|[[IRNSS-1G]] }}{{·}}{{legend2| Red|[[IRNSS-1I]]}}
| footer = {{legend2| RoyalBlue | Earth}}{{·}}{{legend2| magenta |[[IRNSS-1B]] }}{{·}}{{legend2| lime |[[IRNSS-1C]] }}{{·}}{{legend2| Cyan |[[IRNSS-1E]] }}{{·}}{{legend2|Gold|[[IRNSS-1F]] }}{{·}}{{legend2| OrangeRed|IRNSS-1G }}{{·}}{{legend2| Red|[[IRNSS-1I]]}}
}}
}}
{{clear}}
{{clear}}

Latest revision as of 18:17, 21 January 2026

IRNSS-1G
Mission typeNavigation
OperatorISRO
COSPAR ID{{#property:P247}}
SATCAT no.41469
Mission durationPlanned: 12 years
Elapsed: 10 years, 5 months, 23 days
Spacecraft properties
SpacecraftIRNSS-1G
Spacecraft typeSatellite
BusI-1K
ManufacturerISRO Satellite Centre
Space Applications Centre
Launch mass1,425 kilograms (3,142 lb)
Dry mass598 kilograms (1,318 lb)
Power1600 W
Start of mission
Launch date12:50:00, April 28, 2016 (+05:30) (2016-04-28T12:50:00+05:30)
RocketPSLV-XL C33
Launch siteSatish Dhawan (First)
ContractorISRO
Orbital parameters
Reference systemGeocentric
RegimeGeosynchronous Orbit (GSO)
Longitude129.429213 East
Perigee altitude35,780.961 km (22,233.258 mi)[1]
Apogee altitude35,796.200 km (22,242.727 mi)[1]
Inclination4.2637
Period23:56:12.33
Epoch17151.68965311
 

IRNSS-1G was the seventh and final[2] of the Indian Regional Navigation Satellite System (IRNSS) series of satellites after IRNSS-1A, IRNSS-1B, IRNSS-1C, IRNSS-1D, IRNSS-1E and IRNSS-1F. This system of satellites will provide navigational services to the Indian region. The satellite was launched successfully on 28 April 2016 at 07:20 UTC.[2]

IRNSS-1G along IRNSS-1A is being used only for NavIC's short message broadcast service and not for navigation.[3][4]

Launch[edit | edit source]

The satellite was launched from the First Launch Pad (FLP) of Satish Dhawan Space Centre, Sriharikota on board PSLV-C33 XL on 28 April 2016 at 12:50 PM IST.[2][5] The countdown of the launch had begun 51:30 hours before at 9:20 AM IST on 25 April 2016.[6]

After the launch of IRNSS-1G the Indian government named the IRNSS system as NAVIC (Navigation with Indian Constellation).[7]

Specifications[edit | edit source]

Mission life: 12 years (planned).[6]

Lift-off mass:1,425 kilograms (3,142 lb)

Dry mass: 598 kilograms (1,318 lb).[8]

Payload: CDMA ranging payload in C band.[9][10] Navigation payload in L-5 and S band spectrums and Rubidium atomic clocks.[11]

Power: Two triple-junction solar panels to generate 1660W of energy and one Lithium-ion 90A-hr battery is used.[8]

Propulsion: MMH/MON3 based bipropellant system with 12×22N Attitude control thrusters and one 440N LAM.[10]

Orbit: Geosynchronous orbit at 129.5° East longitude with 5° inclination.[8][12]

Cost: Approximately ₹125 crore (US$18 million).[13]

Animation of IRNSS
Around the Earth
Around the Earth - Polar view
Earth fixed frame - Equatorial view, front
Earth fixed frame - Equatorial view, side
Earth fixed frame - Polar view
   Earth ·   IRNSS-1B  ·   IRNSS-1C  ·   IRNSS-1E  ·   IRNSS-1F  ·   IRNSS-1G  ·   IRNSS-1I

See also[edit | edit source]

References[edit | edit source]

  1. ↑ 1.0 1.1 "NORAD Catalog Number 41469". NORAD. Retrieved 2 June 2017.[permanent dead link]
  2. ↑ 2.0 2.1 2.2 "India launches seventh navigation satellite, to get its own GPS". The Hindu. 28 April 2016. Retrieved 28 April 2016.
  3. ↑ "Annual Report 2019-20". Department of Space. Archived from the original on 6 April 2020. Retrieved 5 March 2020.
  4. ↑ "ANNUAL REPORT 2020-2021" (PDF). ISRO. Archived from the original (PDF) on 25 April 2021. Retrieved 6 March 2021.
  5. ↑ "PSLV-C33/IRNSS-1G". ISRO. Archived from the original on 28 April 2016. Retrieved 28 April 2016.
  6. ↑ 6.0 6.1 PTI (26 April 2016). "Countdown for IRNSS-1G launch begins at Sriharikota". The Hindu. Retrieved 28 April 2016.
  7. ↑ "PSLV-C33 Successfully Launches India's Seventh Navigation Satellite IRNSS-1G - ISRO". www.isro.gov.in. Archived from the original on 1 November 2021. Retrieved 1 November 2021.
  8. ↑ 8.0 8.1 8.2 "PSLV-C33 - IRNSS-1G Specifications" (PDF). ISRO. Archived from the original (PDF) on 25 April 2016. Retrieved 28 April 2016.
  9. ↑ "'Isro launches rocket carrying India's seventh navigation satellite'". Business Standard. 28 April 2016. Retrieved 28 April 2016.
  10. ↑ 10.0 10.1 "SALIENT FEATURES OF IRNSS 1G". www.ursc.gov.in. Retrieved 1 November 2021.
  11. ↑ "IRNSS-1G". ISRO. Archived from the original on 24 April 2016. Retrieved 28 April 2016.
  12. ↑ Sangeeta Ojha (28 April 2016). "India's own navigation satellite IRNSS-1G launched: All you need to know about it". India Today. Retrieved 28 April 2016.
  13. ↑ Vanita Srivastava (1 May 2016). "IRNSS: Desi GPS to liberate India from dependence on US, Russia". Economic Times. Retrieved 2 May 2016.

External links[edit | edit source]

Template:IRNSS satellites

Template:Orbital launches in 2016

Retrieved from "https://en.bharatpedia.org/w/index.php?title=IRNSS-1G&oldid=446472"
Discover more