Himanshuucharan at 12:09, 27 February 2026

2026-02-27T12:09:28Z

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{{Short description|Indian navigation satellite}}
{{Use dmy dates|date=March 2020}}
{{use Indian English|date=January 2014}}
{{Infobox spaceflight
| name = PSLV-C31/IRNSS-1E
| names_list = 


| image = 
| image_caption = 
| image_alt = 
| image_size = 


| mission_type = [[Satellite navigation|Navigation]]
| operator = [[ISRO]]
| COSPAR_ID = 2016-003A<ref>[https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2016-003A NASA Space Science Data Coordinated Archive]</ref>
| SATCAT = 41241<ref>{{cite web|url=https://www.satcat.com/sats/41241|title=IRNSS 1E, 41241|publisher=satcat.com|access-date=August 2, 2025}}</ref>
| website = http://www.isro.gov.in/Spacecraft/irnss-1e
| mission_duration = Planned: 12 years<br />Elapsed: {{time interval|20 January 2016|show=ymd|sep=,}}


| spacecraft = IRNSS-1E
| spacecraft_type = Satellite
| spacecraft_bus = [[I-1K]]
| manufacturer = [[Indian Space Research Organisation Satellite Centre|ISRO Satellite Centre]]<br />[[Space Applications Centre]]
| dry_mass = {{convert|598|kg|lb}}
| launch_mass = {{convert|1425|kg|lb}}
| power = 1660 W


| launch_date = {{start date|df=yes|2016|01|20|09|31|00|7=Z}}
| launch_rocket = [[Polar Satellite Launch Vehicle|PSLV-C31]]
| launch_site = [[Satish Dhawan Space Centre|Satish Dhawan]] [[Satish Dhawan Space Centre Second Launch Pad|Second]]<ref>{{Cite web|title = PSLV-C31/IRNSS-1E - ISRO|url = http://www.isro.gov.in/launcher/pslv-c31-irnss-1e|website = isro.gov.in|access-date = 12 January 2016|archive-date = 14 January 2016|archive-url = https://web.archive.org/web/20160114231433/http://www.isro.gov.in/launcher/pslv-c31-irnss-1e|url-status = dead}}</ref>
| launch_contractor = [[Indian Space Research Organisation|ISRO]]


| disposal_type =
| deactivated =
| last_contact =
| decay_date =


| orbit_epoch =
| orbit_reference = [[geocentric orbit|Geocentric]]
| orbit_regime = [[Geosynchronous orbit|Geosynchronous]]
| orbit_periapsis =
| orbit_apoapsis =
| orbit_inclination = 28.09°<ref name="Isroirnss">{{cite web |url=http://www.isro.gov.in/irnss-programme/towards-self-reliance-navigation-irnss |title=Towards Self Reliance in Navigation-IRNSS |publisher=ISRO |url-status=dead |archive-url=https://web.archive.org/web/20160310163951/http://www.isro.gov.in/irnss-programme/towards-self-reliance-navigation-irnss |archive-date=10 March 2016 }}</ref>
| orbit_period =
| orbit_longitude = 111.75°E<ref name="Isroirnss"/>
| apsis =


| programme = [[NavIC]]
| previous_mission = [[IRNSS-1D]]
| next_mission = [[IRNSS-1F]]


| insignia = 
| insignia_caption = 
| insignia_alt = 
| insignia_size = 
}}

'''IRNSS-1E''' is the fifth out of seven in the [[Indian Regional Navigational Satellite System|Indian Regional Navigational Satellite System (IRNSS)]] series of satellites after [[IRNSS-1A]], [[IRNSS-1B]], [[IRNSS-1C]] and [[IRNSS-1D]]. It is one among the seven of the IRNSS constellation of satellites launched to provide navigational services to the region. The satellite was placed in [[geosynchronous orbit]].<ref name="skyrocket">{{cite web|url=http://space.skyrocket.de/doc_sdat/irnss.htm|title=IRNSS |publisher=space.skyrocket.de |access-date=6 December 2014}}</ref> IRNSS-1E has been successfully launched into orbit on 20 January 2016<ref name= deccan_chronicle>{{cite news|url=https://www.deccanchronicle.com/science/200116/isro-chairman-congratulates-team-on-successful-launch.html|title=Deccan chronicle ISRO chairman congratulates team on successful launch}}</ref><ref>{{cite news|url=http://www.business-standard.com/article/current-affairs/successful-commercial-launches-boost-isro-s-reputation-in-2015-115122900399_1.html|title=Successful commercial launches boost ISRO's reputation in 2015 |newspaper=Business Standard India |date=29 December 2015 |access-date=30 December 2015}}</ref> In 2025, IRNSS-1E was planned to be replaced at its orbital slot of 111.75ºE by [[NVS-02]].<ref>{{Cite news |last=C.S |first=Hemanth |date=2025-01-29 |title=ISRO successfully launches NVS-02 satellite; creates history with the 100th launch from Sriharikota |url=https://www.thehindu.com/sci-tech/isro-successfully-launches-nvs-02-satellite/article69153254.ece |access-date=2025-02-02 |work=The Hindu |language=en-IN |issn=0971-751X}}</ref> However, following the failure of NVS-02, IRNSS-1E will countinue to remain at its slot.<ref>{{Cite web |title=ISRO's Latest Mission Hits A Hurdle, Satellite Faces Technical Glitch |url=https://www.ndtv.com/india-news/isro-100th-mission-hits-a-hurdle-satellite-faces-technical-glitch-7618493 |access-date=2025-02-02 |website=www.ndtv.com |language=en}}</ref>

== Satellite ==
IRNSS-1E will help augmenting the satellite based navigation system of India which is currently under development. The navigational system so developed will be regional, targeted towards South Asia. The satellite will provide navigation, tracking and mapping services.<ref name="irnss1b_itv">{{cite news | url=http://www.indiatvnews.com/news/india/isro-after-gslv-launch-pslv-c-with-irnss-b-likely-in-march--32118.html | title=ISRO: After GSLV launch, PSLV C24 with IRNSS-1B likely in March | publisher=India TV | date=5 January 2014 | access-date=6 January 2014 | archive-date=6 January 2014 | archive-url=https://web.archive.org/web/20140106193940/http://www.indiatvnews.com/news/india/isro-after-gslv-launch-pslv-c-with-irnss-b-likely-in-march--32118.html | url-status=dead }}</ref>

The satellite will have two payloads: a navigation payload and CDMA ranging payload in addition with a laser retro-reflector. The payload generates navigation signals at L5 and S-band. The design of the payload makes the IRNSS system interoperable and compatible with [[Global Positioning System|Global Positioning System (GPS)]] and [[Galileo (satellite navigation)|Galileo]].<ref name="skyrocket"/> The satellite is powered by two solar arrays, which generate power up to 1,660 watts, and has a designed life-time of twelve years.<ref name = deccan_chronicle/>

== Launcher ==
The [[Polar Satellite Launch Vehicle]], in its 33rd flight (PSLV-C31), launched IRNSS-1E from the Second Launch Pad (SLP) of [[Satish Dhawan Space Centre]] (SDSC), Sriharikota. As in the previous four launches of IRNSS satellites, PSLV-C31 will use ‘XL’ version of PSLV.<ref name=archive201601142314>[http://www.isro.gov.in/launcher/pslv-c31-irnss-1e PSLV-C31/IRNSS-1E] {{Webarchive|url=https://web.archive.org/web/20160114231433/http://www.isro.gov.in/launcher/pslv-c31-irnss-1e |date=14 January 2016 }}, ISRO. Retrieved 14 January 2016</ref>

{{multiple image
| align = left
| direction = horizontal
| width = 200
| header = Animation of IRNSS
| image1 = Animation of IRNSS orbit around Earth.gif
| caption1 = Around the Earth
| image2 = Animation of IRNSS orbit around Earth - Polar view.gif
| caption2 = Around the Earth - Polar view
| image3 = Animation of IRNSS orbit - Earth fixed - front view.gif
| caption3 = [[ECEF|Earth fixed frame]] - Equatorial view, front
| image4 = Animation of IRNSS orbit - Earth fixed - side view.gif
| caption4 = [[ECEF|Earth fixed frame]] - Equatorial view, side
| image5 = Animation of IRNSS orbit - Earth fixed - polar view.gif
| 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]]}}
}}
{{clear}}

== See also ==
{{Portal|Spaceflight|India}}
* [[List of IRNSS satellites]]
* [[Communication-Centric Intelligence Satellite|Communication-Centric Intelligence Satellite (CCI-Sat)]]
* [[GPS-aided geo-augmented navigation|GPS-aided geo-augmented navigation (GAGAN)]]
* [[Satellite navigation]]

== References ==
{{Reflist|2}}

== External links ==
* [http://www.isro.gov.in/launcher/pslv-c31-irnss-1e PSLV-C31/IRNSS-1E] {{Webarchive|url=https://web.archive.org/web/20160114231433/http://www.isro.gov.in/launcher/pslv-c31-irnss-1e |date=14 January 2016 }}
* [https://web.archive.org/web/20160304193335/http://maadhyam.isro.gov.in/ ISRO Media Online Registration for Launch Coverage]
* [http://www.isro.org/scripts/futureprogramme.aspx ISRO Future Programmes]
* [https://satellitecoverage.net/satellite-tracking/?satellite=41241 IRNSS-1E Real Time Tracking] {{Webarchive|url=https://web.archive.org/web/20160131133130/https://satellitecoverage.net/satellite-tracking/?satellite=41241 |date=31 January 2016 }}

{{IRNSS satellites}}
{{Indian spacecraft}}
{{Orbital launches in 2016}}

[[Category:Spacecraft launched by India in 2016]]
[[Category:IRNSS satellites]]
[[Category:Spacecraft launched by PSLV rockets]]

IRNSS-1E - Revision history

Himanshuucharan at 12:09, 27 February 2026