Talk:Indian Regional Navigation Satellite System

Proposed merge with IRNSS-1E
Recommend merging IRNSS-1E into this article along with the various other similar articles about the previous 4 satellites. There doesn't seem to be enough here to justify a stand alone article. Ad Orientem (talk) 03:41, 17 February 2014 (UTC)

Improve citations by using more references to ISRO's press releases
A lot of references point to news articles and third party websites. I suggest a lot more usage of ISRO's website links and press releases, since most of the information about IRNSS is already out there on their websites anyways, and since they're the authentic source of this information.

Copyright problem removed
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Incorrect Information
The article (first paragraph) states: "The requirement of such a navigation system is driven because access to foreign government-controlled global navigation satellite systems is not guaranteed in hostile situations, as happened to the Indian military depending on American GPS during the Kargil War.[2]"

The U.s. has never denied access to GPS signals to anyone, ever. The cited source (Times of India) is obviously incorrect. This story that America denied GPS to India is repeated many times on the internet, but there is no apparent original source for the story. InspectorVijay (talk) 13:03, 6 October 2015 (UTC)

If you are sure about it, delete it. Akash (talk) 13:42, 8 June 2016 (UTC)

Delayed of course
http://www.crazyengineers.com/threads/isros-irnss-the-desi-navigation-system-to-replace-american-gps.84301/

Is schedule slippage notable for Indian space systems? Hcobb (talk) 17:49, 23 October 2015 (UTC)

Real time tracking.
stuffin.space has a wonderful tool for real time tracking of all space objects. It can track all the satellites simultaneously. http://stuffin.space/?search=IRNSS adding the link to the article Akash (talk) 13:50, 8 June 2016 (UTC)

Multiple wikilinks removal
Hi, can you please explain why you remove wikilink from Indian Regional Navigation Satellite System page? here. Thanks Sparta cus!  t@lk 15:15, 5 August 2016 (UTC)
 * As explained in the edit summary: because of MOS:LINK. fgnievinski (talk) 15:18, 5 August 2016 (UTC)

External links modified
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Accuracy Section
In the "Accuracy" section there is a line "The GPS, for comparison, had a position accuracy of 20-30 m." I believe the GPS accuracy should be 15m without any augmentation and 3-5 with some kind of augmentation. --Abdul Jabbar 09:21, 20 June 2017 (UTC)

External links modified
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 * Added archive https://web.archive.org/web/20101205044458/http://www.oosa.unvienna.org/pdf/icg/2008/expert/2-3.pdf to http://www.oosa.unvienna.org/pdf/icg/2008/expert/2-3.pdf

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"redundant"?
The article says, "In 2017 all rubidium atomic clocks on board IRNSS-1A failed, rendering the satellite redundant." I do not think that word means what you think it means.

A redundant satellite would be a spare, available for use in place of another satellite, in case the other one fails. In this case, IRNSS-1A has failed, so it cannot replace another satellite if the other one fails.

I think the correct word is "non-functional," or "malfunctioning," or "unusable." Would anyone object if I make that change? NCdave (talk) 22:46, 11 November 2017 (UTC)

External links modified
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 * Added archive https://web.archive.org/web/20110417015013/http://informationmadness.com/technology/tech-tips/3684-3-satellites-to-be-launched-by-isro-on-20th-april.html to http://informationmadness.com/technology/tech-tips/3684-3-satellites-to-be-launched-by-isro-on-20th-april.html
 * Added archive https://web.archive.org/web/20070331145825/http://www.isro.org/newsletters/spaceindia/aprsep2006/Satnavindustry.htm to http://www.isro.org/newsletters/spaceindia/aprsep2006/Satnavindustry.htm

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External links modified (January 2018)
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Accuracy 2
I suggest the accuracy section to be updated in regards to comparison towards GPS, or remove the comparison completely. The information is outdated. Considering the source is from 2008 and compared to civilian GPS, not military. Per GPS.GOV, the accuracy is 4.9 meters and the military use dual frequency/band. Here is the source https://www.gps.gov/systems/gps/performance/accuracy/ — Preceding unsigned comment added by 2603:3003:3095:8000:59F3:B7AB:670E:A702 (talk) 18:25, 19 July 2019 (UTC)

A Commons file used on this page has been nominated for deletion
The following Wikimedia Commons file used on this page has been nominated for deletion: Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 18:27, 20 August 2019 (UTC)
 * IRNSS Series 1.jpg

Future developments
The section needs to be updated. — UnladenSwallow (talk) 02:54, 2 October 2019 (UTC)

1A - Partial Failure?
The satellite is still working and isn't completely lost as is being implied in the wiki. Acc. to Annual Report 2019-20 of ISRO, the satellite is being used for communication, granted this is not the main purpose but the satellite is far from being defunct.

IMHO, I think it will be best to label the status as Partial Failure than a complete failure.

Source- Page 50


 * cc ,

Shashpant (talk) 05:51, 4 March 2020 (UTC)


 * I agree, though all three clocks on it have failed making it ineffective for PNT services apparently they have specifically re-purposed IRNSS-1A and are using it to relay short messages to receivers. Though it should be noted this location specific messaging service is part of NavIC from the beginning. Some references.

Ohsin 07:04, 4 March 2020 (UTC)
 * https://timesofindia.indiatimes.com/home/science/three-atomic-clocks-of-desi-gps-satellites-stop-working/articleshow/59116886.cms
 * https://www.unoosa.org/pdf/icg/2016/icg11/05.pdf (PDF: Pg 9, 10)
 * Signal-in-Space ICD for Messaging Service IRNSS-1A (PDF)
 * https://www.unoosa.org/documents/pdf/icg/2018/icg13/wgb/wgb_18.pdf (PDF)


 * I don't see anything wrong in changing it to partial success as messaging service was part of NavIC. Just remember to mention it in remark section so that it'll be clear to audience. Cheers Brown Chocolate (talk) 12:25, 4 March 2020 (UTC)

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 * NavIC logo.jpg