See also perhaps: * https://gpsjam.org
The FAQ on that site is useful too: https://gpsjam.org/faq/
Flightradar24's new GPS jamming map
41–50 of 299 posts
Re: Flightradar24's new GPS jamming map
#42It would be awesome if they published this data more openly for academic use! Edit: Looks like they might source their data from commercial ADSB providers. Bummer
They are the commercial ADSB provider
Re: Flightradar24's new GPS jamming map
#43So how should I interpret this? The map lacks geopolitical boundaries, so it's hard to interpret. There looks like a big hole of no data over Ukraine, where I'd most expect GPS jamming, but I suppose there are no civilian flights either. Maybe they could setup an GPS observation station on the ground at a surveyed point to get data there. There's a big red blob over Turkey, is that maybe the southern edge of the reac…
Yea, oddly, if you go back to like august, there's still a bunch of red over the Mediterranean, parts of Israel, Jordan, Lebanon, etc. so it's not totally clear what that is. I've heard anecdotally that gps has gotten unusable in Israel in recent weeks but it's not clear why that's changed based on the mapping information we're seeing here.
Re: Flightradar24's new GPS jamming map
#44It's kind of neat how this works: > As part of the ADS-B messages we receive from each aircraft, the Navigation integrity category (NIC) encodes the quality and consistency of navigational data received by the aircraft. The NIC value informs how certain the aircraft is of its position by providing a radius of uncertainty. > Poor NIC values alone might indicate a problem with an aircraft’s equipment or unfavorable pos…
> A single observer can't really say for certain that jamming is happening; you need a distributed sample from multiple different sensors over a period of time to have reasonably high confidence.
Could you use RTLSDR triangulation to hone in on granular lat long of jamming sources?
https://www.rtl-sdr.com/detecting-gps-jammers-in-augmented-r...
https://www.rtl-sdr.com/kiwisdr-tdoa-direction-finding-now-f...
Re: Flightradar24's new GPS jamming map
#45What's going on in that part of western australia? It's a very empty area
> What's going on in that part of western australia? It's a very empty area You answered your own question. Put 2+2 together. Hint... https://www.flightradar24.com/apply-for-receiver/
I don't live in that country though
Re: Flightradar24's new GPS jamming map
#46The choice of cells as a fundamental unit is interesting, I guess it’s better than a color coded gradient map. But this will still suffer from centroid issues.
I remember reading about geohexes (H3).
Re: Flightradar24's new GPS jamming map
#47The data is taken from aircraft [EDIT: not airlines; see traceroute66's comment], so it doesn't give full coverage of the world, but it does include other satellite navigation systems aside from just GPS. Looks like the jammed/interfered areas are:
* A large part of Eastern Europe around Ukraine is missing data, and there are many jammed/interfered areas around it, including the southern coast of the Black Sea and parts of Poland and the Baltic. Part of the Baltic Sea off the coast of Kaliningrad are also jammed/interfered.
* Part of Germany near Berlin, possibly part of the Ukraine-related jamming/interference?
* A large part of the eastern Mediterranean and some of the Middle East around Gaza.
* A small area on the India-Pakistan border near Punjab and Lahore.
* Two medium-sized areas in western Myanmar.
* Two small areas in New Guinea with a gap in the data between them, spanning the Indonesia-Papua New Guinea border.
* Two small areas in western Australia.
* A small area on the US-Mexico border.
* A dot in southern China with some gaps in the data around it near the border with Vietnam.
Ukraine, Gaza, and Myanmar all have major conflicts going on. Other comments have suggested that the US-Mexico interference might be related to drug cartels. The India-Pakistan border is a longstanding point of tension. Not sure what (if anything) is going on in New Guinea and Australia.
The jamming/interference in India-Pakistan, US-Mexico, and China all went away in the last 6 hours -- they're only visible in the 24-hour data.
Re: Flightradar24's new GPS jamming map
#48Earlier quoted context omitted.
> What's going on in that part of western australia? It's a very empty area You answered your own question. Put 2+2 together. Hint... https://www.flightradar24.com/apply-for-receiver/
I don't live in that country though
> I don't live in that country though
Exactly.
You don't live there.
Not many people live in the Australian desert.
Conclusion: No data or very limited data
Re: Flightradar24's new GPS jamming map
#49I wonder why there's some jamming near a small section of the Texas/Mexico border?
That is Eagle Pass, TX. The infamous, massive border crossing area where suspected criminal border crossers are corraled under the bridge, where Elon visited, etc. The jamming is done to make crossing the border without going through the checkpoint more difficult
Do these cartels only operate during normal US workday hours and observe US federal holidays?
Re: Flightradar24's new GPS jamming map
#50https://www.flightradar24.com/data/gps-jamming Also: https://gpsjam.org/ | https://hn.algolia.com/?q=gpsjam (am I missing any other GPS jamming mapping or data collection projects?)
Not jamming specific but:
https://sapt.faa.gov/outages.php?outageType=129001450&outage...