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You're not the only person: https://web.stanford.edu/group/scpnt/gpslab/pubs/papers/Liu_... TL;DR: It's weak signal, not jamming. The weak signal reports come from military training aircraft carrying out maneuvers that cause temporary signal loss.
really? unless they're jamming it, how would that happen?
Then again, I'm not very GIS/geodesy minded, so maybe hexagons are the best shape that'll tessellate over a sphere easily.
Was this work in any meaningful way inspired by GPSjam? If yes, it'd be nice to have an acknowledgement in there.
What's going on in that part of western australia? It's a very empty area
Red areas: Military experiments and exercises, probably. https://gpsjam.org/faq/#what-can-cause-aircraft-to-report-lo...
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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
Many of the patches are not surprising, but why is a small area between Germany and Sweden jammed?
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Yep, this map doesn't show jamming. It shows weak signals, of which jamming is one potential cause. An airplane pointing their GPS receiver at the ground will also cause a weak signal.
How does an airplane "point their GPS receiver at the ground" (for an extended period of time since a combined GNSS/INS positioning solution, which is what all airliners use at this point as far as I know, will need an extended signal loss to report decreased accuracy)?
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The hole over Ukraine is definitely the lack of civilian flights. Another notable spot is Kaliningrad, the Russian exclave. It looks relatively normal on some days, like today, but on others like yesterday it's covered by solid red stretching far into Poland, Sweden and even Germany.
> Another notable spot is Kaliningrad, the Russian exclave. It looks relatively normal on some days, like today, but on others like yesterday it's solid red. Oh yeah, I totally forgot that was a thing, and that explains that spur of red in the Baltic. I'd (probably incorrectly) assumed it was some kind of spillover from jamming in Ukraine. I didn't realize you could look at it over multiple days. One interesting thin…
This is suspiciously similar to `gpsjam.org`. It's useful, for sure, and it does use readily-available ADS-B data that FR24 (and ADSBExchange) uses anyway, but the data viz is just eerily similar. Then again, I'm not very GIS/geodesy minded, so maybe hexagons are the best shape that'll tessellate over a sphere easily. Was this work in any meaningful way inspired by GPSjam? If yes, it'd be nice to have an acknowledgem…
I've seen hexagons used for maps and boardgames for years.