3 ms·

> India went on to build their own Presumably there’s some lead time on that though

iamshs 8y ago
India’s NavIC is riddled with problems. Atomic clocks on some of the satellites have failed. ISRO is opaque about the malfunctions. Researchers have found that it can be easily jammed with household WiFi signals causing severe degradation of signal strength. Nobody is really using the system, all the talk has been about fishing boats carrying the receivers. India started developing after GPS was denied during Kargil War with Pakistan in 1999. More recently India’s (More like Russia’s) cruise missile, BrahMos, veered off target by 7 Kms as GPS signals were cut off mid flight. India has tried replicating GPS, but the system is still not proven.
- krtkush 8y ago
  Could you provide sources on all of these claims? I know the clocks were breaking down but those clocks are not made by ISRO.
  - iamshs 8y ago
    Atomic clocks failing (4 satellites have malfunctioning clocks out of 7): https://www.thehindu.com/news/national/isros-clock-to-prop-up-indias-own-gps/article23787959.ece https://www.thehindu.com/news/national/isros-clock-to-prop-u... In one article, ISRO shared that they heaved a sigh of relief every morning on seeing that IRNSS satellites were functioning normally. ISRO is trying to replace the clocks from a Swiss manufacturer with their own. Same clocks failed on Galileo, but causes were different. BrahMos cruise missile failure: https://frontline.thehindu.com/static/html/fl2607/stories/20090410260704400.htm https://frontline.thehindu.com/static/html/fl2607/stories/20... WiFi jamming: https://thewire.in/space/study-says-navic-frequency-too-close-to-wifi-may-cause-interference https://thewire.in/space/study-says-navic-frequency-too-clos... Original research paper is quite damning on this one. India is now trying to be part of Galileo project: https://www.eetimes.com/document.asp?doc_id=1156188 https://www.eetimes.com/document.asp?doc_id=1156188
    - krtkush 8y ago
      Thanks! The signal jamming issue is quite glaring. > India is now trying to be part of Galileo project "Now" would be a stretch, would it not? That article is from 2005.
      - iamshs 8y ago
        Meant to post 2-3 days old article: https://www.express.co.uk/news/world/1119329/india-galileo-space-sector-brexit-news-theresa-may-eu https://www.express.co.uk/news/world/1119329/india-galileo-s... Original article on Business Standard is paywalled. This one is bit outlandish, but retains the essence of the article.

India’s NavIC is riddled with problems. Atomic clocks on some of the satellites have failed. ISRO is opaque about the malfunctions. Researchers have found that it can be easily jammed with household WiFi signals causing severe degradation of signal strength. Nobody is really using the system, all the talk has been about fishing boats carrying the receivers. India started developing after GPS was denied during Kargil War with Pakistan in 1999. More recently India’s (More like Russia’s) cruise missile, BrahMos, veered off target by 7 Kms as GPS signals were cut off mid flight. India has tried replicating GPS, but the system is still not proven.

krtkush 8y ago
Could you provide sources on all of these claims? I know the clocks were breaking down but those clocks are not made by ISRO.
- iamshs 8y ago
  Atomic clocks failing (4 satellites have malfunctioning clocks out of 7): https://www.thehindu.com/news/national/isros-clock-to-prop-up-indias-own-gps/article23787959.ece https://www.thehindu.com/news/national/isros-clock-to-prop-u... In one article, ISRO shared that they heaved a sigh of relief every morning on seeing that IRNSS satellites were functioning normally. ISRO is trying to replace the clocks from a Swiss manufacturer with their own. Same clocks failed on Galileo, but causes were different. BrahMos cruise missile failure: https://frontline.thehindu.com/static/html/fl2607/stories/20090410260704400.htm https://frontline.thehindu.com/static/html/fl2607/stories/20... WiFi jamming: https://thewire.in/space/study-says-navic-frequency-too-close-to-wifi-may-cause-interference https://thewire.in/space/study-says-navic-frequency-too-clos... Original research paper is quite damning on this one. India is now trying to be part of Galileo project: https://www.eetimes.com/document.asp?doc_id=1156188 https://www.eetimes.com/document.asp?doc_id=1156188
  - krtkush 8y ago
    Thanks! The signal jamming issue is quite glaring. > India is now trying to be part of Galileo project "Now" would be a stretch, would it not? That article is from 2005.
    - iamshs 8y ago
      Meant to post 2-3 days old article: https://www.express.co.uk/news/world/1119329/india-galileo-space-sector-brexit-news-theresa-may-eu https://www.express.co.uk/news/world/1119329/india-galileo-s... Original article on Business Standard is paywalled. This one is bit outlandish, but retains the essence of the article.