Interesting to so easily see the quite aggressive radar/jamming near key Russian sites on European Space Agency's Synthetic-Aperture Radar images I suppose there is a trade off on "jam/radar on 1-3Ghz and reveal exactly where the radar is" and being blind on those bands, I assume if this is what the boring open access stuff can see, whatever the intel agencies have is a lot more interesting But interesting regardless!
one honk maybe more
hisold@toot.io
replied 27 Sep 2025 11:36 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/4r26V154914pZ2xwQx
@benjojo Why are all lines on such a particular angle? Is it related to the satellite orbit? Is the jammer located at the crossing of two such lines?
benjojo
replied 27 Sep 2025 11:41 +0000
in reply to: https://toot.io/users/hisold/statuses/115276052666653145
@hisold I think both, Some of this will be super aggressive point to point radio that is used in some surface to air missile batteries, because the actual missile batteries are separated in distance from the radar, who are also separated in distance from the operator. You used(?) to be able to easily see US Patriot missile setups with the same SAR trick, I assume they have cleaned some of this up now But yes, the SAR stuff does generally glide in a straight line (in orbital terms) so you generally will see these streaks. I also suspect _some_ of these (less powerful) streaks are just commercial 802.11 links operating in SAR bands, either legally or not
benjojo
replied 27 Sep 2025 11:34 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/4r26V154914pZ2xwQx
To be clear, this is not just a Russian thing, you can see what looks like radar (or point to point radios) over west Europe as well, but with way less intensity
wolf480pl@mstdn.io
replied 27 Sep 2025 11:42 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/T3Pgps4r2883n99s4V
benjojo
replied 27 Sep 2025 11:46 +0000
in reply to: https://mstdn.io/users/wolf480pl/statuses/115276075759676794
@wolf480pl PTP's at distance generally have a huge spread! So much that for some places it's a real menace on weather radar See https://radar4ctu.bourky.cz/ I've seen some (but cannot find right now) some pages where the radar can decode the SSIDs/MACs of the radios for future legal enforcement to use
wolf480pl@mstdn.io
replied 27 Sep 2025 11:49 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/SWggcBbyFy9CNpyC72
@benjojo hmm ok... so if you look at this ireland picture, there's a trail of brighter and dimmer rectangles Is this because the link emits at so many angles (similar to Fresnel zones) ? Or is this an artifact of the spatial fourier transform that SAR does to reconstruct the ground image?
benjojo
replied 27 Sep 2025 11:52 +0000
in reply to: https://mstdn.io/users/wolf480pl/statuses/115276103774025655
@wolf480pl Hard to know, decent SAR technology is very much in the "export controlled" knowledge category. I assume the "block-ey lines" are more radar than P2P radio, since that implies that whatever is transmitting is going in/out of the SAR frequency. There are lots of kinds of radar out there, but if a radar is doing frequency sweeping then yeah it's gonna look similar to that