IRNSS-1I
{{Short description|Indian navigation satellite}}
{{Infobox spaceflight|auto=all
| name = IRNSS-1I
| image = File:IRNSS_Series_1.jpg
| image_caption = IRNSS series one spacecraft
| mission_type = Navigation
| operator = ISRO
| website =
| COSPAR_ID = 2018-035A{{cite web|url=https://www.n2yo.com/satellite/?s=43286|title=IRNSS 1I Satellite details|publisher=n2yo|access-date=14 April 2018}}
| SATCAT = 43286{{cite web|url=https://www.karhukoti.com/webtracker?s=43286|title=IRNSS 1I|publisher=karhukoti|access-date=19 April 2018}}
| mission_duration = 10 years
| spacecraft_bus =
| manufacturer = ISRO Satellite Centre
Space Applications Centre
| dry_mass = {{convert|600|kg|lb}}
| launch_mass = {{convert|1425|kg|lb}}
| power =
| launch_date = 11 April 2018, 22:34 UTC{{cite web|title=Launch date|url=https://spaceflight101.com/events/pslv-c41-irnss-1i/|publisher=Spaceflight101|date=27 March 2018|access-date=27 March 2018|archive-date=27 March 2018|archive-url=https://web.archive.org/web/20180327212127/https://spaceflight101.com/events/pslv-c41-irnss-1i/|url-status=dead}}
| launch_rocket = PSLV-XL PSLV-C41{{cite web|title=Official page|url=https://www.isro.gov.in/pslv-c41-irnss-1i-mission|publisher=Economic Times|date=11 March 2018|access-date=16 March 2018|archive-url=https://web.archive.org/web/20180317035846/https://www.isro.gov.in/pslv-c41-irnss-1i-mission|archive-date=17 March 2018|url-status=dead}}
| launch_site = Satish Dhawan SLP
| launch_contractor = ISRO
| disposal_type =
| deactivated =
| last_contact =
| decay_date =
| orbit_epoch =
| orbit_reference = Geocentric
| orbit_regime = Geosynchronous
| orbit_periapsis =
| orbit_apoapsis =
| orbit_inclination = 29°
| orbit_period = 1450.9 minutes{{cite web|url=https://www.karhukoti.com/webtracker?s=43286|title=IRNSS 1I|publisher=karhukoti|access-date=19 April 2018}}
| orbit_longitude = 55° E
| apsis = gee
| programme = NavIC
| previous_mission = IRNSS-1H
| next_mission = NVS-01
}}
IRNSS-1I is an Indian navigational satellite that forms part of the Indian Regional Navigational Satellite System. IRNSS-1I is the ninth satellite launched for the IRNSS constellation and one of five IRNSS satellites currently operational.{{Cite web |date=2023-05-29 |title=ISRO’s new NavIC satellite launches successfully: Why a regional navigation system matters to India |url=https://indianexpress.com/article/explained/explained-sci-tech/new-navic-satellite-launching-today-why-a-regional-navigation-system-matters-to-india-8633947/ |access-date=2024-01-04 |website=The Indian Express |language=en}} The satellite is intended to replace the failed IRNSS-1A, and complete the constellation of geosynchronous navigation satellites after IRNSS-1H failed to do so. The satellite's assembly, integration and testing is partly done by a consortium of six small firms led by Alpha Design Technologies, a Bengaluru-based aerospace firm under URSC's supervision.{{cite web|title=Industry partnership with Alpha Design Technologies|url=http://www.thehindu.com/todays-paper/tp-national/tp-andhrapradesh/satellite-built-by-isro-industry-partnership-set-for-launch/article19488075.ece|work=The Hindu|date=14 August 2017}}
Payload
Like its predecessor, IRNSS-1I has two types of payloads, navigation payload and the ranging payload. The navigation payload transmits navigation service signals to the users. This payload is operating in L5 band and S band. A highly accurate rubidium atomic clock is part of the navigation payload of the satellite; failure of these rubidium atomic clocks was the reason IRNSS-1A was deemed unfit.{{cite web |date=31 August 2017 |title=ISAC's website for IRNSS |url=https://www.isac.gov.in/navigation/irnss.jsp |publisher=ISAC}} The ranging payload consists of transponder which is operated in CDMA mode for two-way range measurements. The IRNSS satellites continuously emits time stamped navigation signals, which are received by the ground-based user receivers. The information is then processed by the receivers to derive their own position, velocity and time. The system provides seamless, uninterrupted services under all weather conditions.
Satellite
The satellite will help in completing the satellite based navigation system of India which is currently under development. The IRNSS space segment consists of seven satellites. After the failure of all three rubidium Atomic clocks on-board IRNSS-1A and the failure of IRNSS-1H to separate from the heat shield of the launch vehicle, IRNSS constellation remains incomplete without this satellite.
Launch
IRNSS-1I was successfully launched aboard the 43rd flight of PSLV (PSLV-C41) on 11 April 2018.{{cite news|url=https://www.thehindu.com/sci-tech/science/irnss-1i-up-in-orbit-completes-navigation-fleet/article23508603.ece|title=IRNSS-1I up in space, completes first phase of Indian regional navigation constellation|website=The Hindu |date=12 April 2018 }}{{cite news|url=https://timesofindia.indiatimes.com/india/isro-successfully-launches-navigation-satellite-irnss-1i-to-replace-faulty-irnss-1a/articleshow/63723847.cms|title=Isro successfully launches navigation satellite IRNSS-1I to replace faulty IRNSS-1A|website=The Times of India |date=12 April 2018 }}
{{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 = Earth fixed frame - Equatorial view, front
| image4 = Animation of IRNSS orbit - Earth fixed - side view.gif
| caption4 = Earth fixed frame - Equatorial view, side
| image5 = Animation of IRNSS orbit - Earth fixed - polar view.gif
| caption5 = 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}}
References
{{Reflist|2}}
External links
- [http://www.isro.org/scripts/futureprogramme.aspx ISRO Future Programmes]
{{IRNSS satellites}}
{{Orbital launches in 2018}}
{{PSLV}}
Category:Spacecraft launched by India in 2018