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GPSJam: Daily Maps of GPS Interference

gpsjam.org

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Re: GPSJam: Daily Maps of GPS Interference

#11

Post by pmontra »

jjwiseman wrote: post #3

I made this site. Copying a comment I made on HN a few weeks ago: The ADS-B signals that many aircraft broadcast include not just the aircraft's GPS positions, but also a measure of GPS accuracy (strictly speaking, ADS-B doesn't talk about GPS specifically and can handle any sort of navigation technology; I'm sure there are some planes out there reporting positions based on inertial navigation systems, with correspon…

I noticed that the map is perhaps the one that moves more smoothly on my browser (Firefox Android), included the browser version of Google maps. Well done but how did you do it?

On the other side I couldn't use the history button to come back to HN after visiting the site: too many URLs pushed into history. As a very low priority activity, is there a way to keep the URL constant and generate one only if someone wants to share a screen?

Re: GPSJam: Daily Maps of GPS Interference

#12

Post by EdwardDiego »

jjwiseman wrote: post #3

I made this site. Copying a comment I made on HN a few weeks ago: The ADS-B signals that many aircraft broadcast include not just the aircraft's GPS positions, but also a measure of GPS accuracy (strictly speaking, ADS-B doesn't talk about GPS specifically and can handle any sort of navigation technology; I'm sure there are some planes out there reporting positions based on inertial navigation systems, with correspon…

Amazing work, but just some feedback, I'm running Opera 70.3 on an Android phone, and navigating the map filled my navigation history with a large amount of links to a given lat/long, I'm guessing they referred to where I touched while rotating or zooming in.

Anyway, edge case browser and all, but thought I'd raise it in case it's an issue.

Re: GPSJam: Daily Maps of GPS Interference

#13

Post by ddeck »

EdwardDiego wrote: post #12
jjwiseman wrote: post #3

I made this site. Copying a comment I made on HN a few weeks ago: The ADS-B signals that many aircraft broadcast include not just the aircraft's GPS positions, but also a measure of GPS accuracy (strictly speaking, ADS-B doesn't talk about GPS specifically and can handle any sort of navigation technology; I'm sure there are some planes out there reporting positions based on inertial navigation systems, with correspon…

Amazing work, but just some feedback, I'm running Opera 70.3 on an Android phone, and navigating the map filled my navigation history with a large amount of links to a given lat/long, I'm guessing they referred to where I touched while rotating or zooming in. Anyway, edge case browser and all, but thought I'd raise it in case it's an issue.

I'm on Firefox Android and experienced the same issue.

Had to close the tab to get back to HN.

Aside from that, really impressive work. Well done.

Re: GPSJam: Daily Maps of GPS Interference

#14

Post by jjwiseman »

ddeck wrote: post #13
EdwardDiego wrote: post #12

Earlier quoted context omitted.

Amazing work, but just some feedback, I'm running Opera 70.3 on an Android phone, and navigating the map filled my navigation history with a large amount of links to a given lat/long, I'm guessing they referred to where I touched while rotating or zooming in. Anyway, edge case browser and all, but thought I'd raise it in case it's an issue.

I'm on Firefox Android and experienced the same issue. Had to close the tab to get back to HN. Aside from that, really impressive work. Well done.

Should be fixed now. Thanks!

Re: GPSJam: Daily Maps of GPS Interference

#17

Post by dpq »

Cool project, thanks! A bit nitpicking:

> In Europe, Poland, Romania, Lithuania, Latvia, Kaliningrad, and Finland sometimes show presumed jamming activity, depending on how active Russia is.

The wording here is confusing, it seems to imply that Kaliningrad is a country, which it is not (it's a Russian exclave, as the author mentions in one of the HN comments).

Re: GPSJam: Daily Maps of GPS Interference

#18

Post by vincnetas »

dpq wrote: post #17

Cool project, thanks! A bit nitpicking: > In Europe, Poland, Romania, Lithuania, Latvia, Kaliningrad, and Finland sometimes show presumed jamming activity, depending on how active Russia is. The wording here is confusing, it seems to imply that Kaliningrad is a country, which it is not (it's a Russian exclave, as the author mentions in one of the HN comments).

Would it sound similar like saying hurricane about to hit Cuba, Florida and Dominican Republic. This does not imply that Florida is a country is just more precise location definition than saying USA. Same here with Kaliningrad as part of Russia.

Re: GPSJam: Daily Maps of GPS Interference

#19

Post by jjwiseman »

graderjs wrote: post #9

This is fascinating. Really cool to see a map of GPS signals on Earth and the site looks really good, too. Love the colors and interface! Awesome :) Can anyone narrate any of the jammed signals? Like for instance what would be jamming in the ocean between Tripoli and Benghazi? Or what would be jamming around San Antonio, TX?

I know the stories behind some of the regions, or at least some hypotheses.

Interference in the U.S. is almost always the result of military testing or training. If you check against another map (Google maps, or skyvector.com/globe.adsbexchange.com to see sectional charts) you'll see that the interference region is usually centered on or close to a military base or Military Operations Area. There are often FAA notices to pilots about potential GPS outages in those areas.

Around Syria, C4ADS did some research a few years back identifying Russia as the main culprit; I think the conclusion was that Russia is jamming GPS to defend their bases from drone attack. https://www.c4reports.org/aboveusonlystars

At least some of the jamming around Moscow is thought to be an anti-drone measure (to stop nosy photographers? assassins?): https://www.gpsworld.com/jammers-at-dachas-add-to-russias-ab...

In the Baltic, the assumption seems to be that it's usually Russian military.

I wish someone more knowledgeable about what's going on in other regions with interference would write about them! I just don't have the time and expertise do dig into all of them.

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