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{{Short description|Indian Navigation Satellite}}
{{Infobox spaceflight|auto=all
| name = NVS-01
| image = File:NVS-01 second genearation NavIC satellite.png
| image_caption = NVS series spacecraft

| mission_type = [[Satellite navigation|Navigation]]
| operator = [[ISRO]]
| website =
| COSPAR_ID = 2023-076A <ref name="nvs-tle">{{cite web|url=https://www.n2yo.com/satellite/?s=56759|title=IRNSS 1J Satellite details|publisher=n2yo|access-date=2023-05-29}}</ref>
| SATCAT = 56759<ref name="nvs-tle"/>
| mission_duration = Planned: 12 years<br /> Elapsed: {{time interval|29 May 2023|show=ymd|sep=,}}

| spacecraft_bus = [[I-2K]]
| manufacturer = [[Indian Space Research Organisation Satellite Centre|ISRO Satellite Centre]]<br/>[[Space Applications Centre]]
| dry_mass =
| launch_mass = {{convert|2232|kg|lb}}
| power =

| launch_date = 29 May 2023, 16:10 [[UTC]]<ref name="HT-160523">{{Cite web |date=2023-05-14 |title=Isro to launch navigation satellite NVS-01 on May 29 |url=https://www.hindustantimes.com/india-news/isro-to-launch-navic-satellite-nvs-01-on-gslv-mk-ii-in-may-to-replace-irnss-1g-offer-better-accuracy-and-coverage-101684006373706.html |access-date=2023-05-16 |work=[[Hindustan Times]] |language=en}}</ref>
| launch_rocket = [[Geosynchronous Satellite Launch Vehicle|GSLV-Mk2]] [[GSLV F12|F12]]
| launch_site = [[Satish Dhawan Space Centre|Satish Dhawan]] [[Satish Dhawan Space Centre Second Launch Pad|SLP]]
| 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 = 5.1°
| orbit_period =
| orbit_longitude = 129.55° E
| apsis =
| programme = [[NavIC]]
| previous_mission = [[IRNSS-1I]]
| next_mission = [[NVS-02]]
}}

'''NVS-01''' is the first in the series of second generation navigation satellite and the ninth satellite in the [[Navigation with Indian Constellation]] (NavIC), with an alternate name of, IRNSS-1J. It will augment the existing satellite and bolster the capability of the NavIC constellation by adding more robustness and new features.<ref name="IE-300523">{{cite web|url=https://indianexpress.com/article/explained/explained-sci-tech/new-navic-satellite-launching-today-why-a-regional-navigation-system-matters-to-india-8633947/| title= ISRO's new NavIC satellite launches successfully: Why a regional navigation system matters to India | work=[[Indian Express]] |date=2023-05-30}}</ref> ISRO already launched [[IRNSS]] [[IRNSS-1A|1A]], [[IRNSS-1B|1B]], [[IRNSS-1C|1C]], [[IRNSS-1D|1D]], [[IRNSS-1E|1E]], [[IRNSS-1F|1F]], [[IRNSS-1G|1G]], [[IRNSS-1H|1H]] and [[IRNSS-1I|1I]]. The satellite is intended to replace [[IRNSS-1G]] and augment the constellation of geosynchronous navigation satellites after [[IRNSS-1I]].<ref name="TOI-120321">{{cite web|url=https://timesofindia.indiatimes.com/india/isro-aims-for-7-more-launches-from-india-in-2021/articleshow/81455856.cms|title=Isro aims for 7 more launches from India in 2021|work=[[Times of India]]|date=12 March 2021}}</ref>

==Payload==
NVS-01 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 [[L band|L1 band]], [[L band|L5 band]] and [[S band]]. A highly stable Rubidium atomic clock is part of the navigation payload of the satellite. Failure of the imported Rubidium atomic clocks across the fleet of previous generation of satellite led to the creation of an indigenous option. NVS-01 is the first navigation satellite to host the indigenous clock.<ref name="FP-300523">{{cite web|url=https://www.firstpost.com/india/india-one-of-5-countries-to-use-rubidium-atomic-clock-in-their-gps-satellite-nvs-1-navic-12660762.html|title= India joins an elite club, one of 5 countries to use Rubidium Atomic Clock in their GPS satellite |work=[[Firstpost]]|first=Mehul Reuben|last=Das|date=2023-05-23}}</ref>

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.<ref name="HT=300523">{{cite web|url=https://www.hindustantimes.com/india-news/indias-isro-successfully-launches-nvs-01-navigation-satellite-plans-for-chandrayaan-3-and-aditya-l1-missions-101685386977377.html|title=India's navigation system gets a boost after ISRO successfully launches NVS-01 satellite|work=[[Hindustan Times]]|date=2023-05-29}}</ref>

The new generation of navigation satellite features a new and improved encryption system for bolstering the communication of the satellite specially for the restricted users.<ref name="FE-300523">{{cite web|url=https://www.financialexpress.com/business/defence-from-navic-1-0-to-20-isro-needs-to-learn-from-mistakes-3106112/|title=From NavIC 1.0 to 2.0, ISRO needs to learn from mistakes|work=[[The Financial Express (India)|Financial Express]]|date=2023-05-23}}</ref>

==Satellite==
The satellite will help in maintaining the continuity that was lagging due to the failure of Rubidium Atomic clocks in previous satellites whilst bolstering the feature set with new bands and longer life. The [[NavIC]] space segment consists of seven satellites. With the new series of satellites, ISRO aims to tap into the low power satellite navigation segment like Smart Watches and fitness trackers whilst cementing its Navigation system by allowing it to seamlessly integrate and interoperate with the existing Navigation system. The inclusion of the civilian L1 band will further bolsters [[NavIC]] position in the mass market.<ref>{{cite web|url=https://www.newindianexpress.com/states/andhra-pradesh/2023/may/30/indias-navic-may-replace-gps-2579932.html|title=India's NavIC may replace GPS|work=[[The New Indian Express]]|date=2023-05-30|first=SV Krishna|last=Chaitanya}}</ref>

==Launch==
NVS-01 was successfully launched by 15th flight of [[GSLV]] (GSLV-F12) in Mk2 configuration on 29 May 2023.<ref name="TOI-160523">{{Cite news |date=2023-05-16 |title=Isro to launch new navigation satellite on May 29 |url=https://timesofindia.indiatimes.com/india/isro-to-launch-new-navigation-satellite-on-may-29/articleshow/100261330.cms?from=mdr|work=[[The Times of India]] |access-date=2023-05-16 |issn=0971-8257}}</ref><ref name="TR-290523">{{cite news|url=https://www.tribuneindia.com/news/nation/nvs-01-placed-into-orbit-512442|title=NVS-01 placed into orbit|work=[[The Tribune (Chandigarh)|The Tribune]]|date=2023-05-29}}</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}}
* [[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.org/scripts/futureprogramme.aspx ISRO Future Programmes]

{{IRNSS satellites}}
{{Orbital launches in 2023}}
{{GSLV}}

[[Category:IRNSS satellites]]
[[Category:Spacecraft launched by India in 2023]]
[[Category:Spacecraft launched by GSLV rockets]]
[[Category:May 2023 events in India]]

NVS-01 - Revision history

Ajay Kumar: Created a new article