Comment by cryptoegorophy
5 hours ago
Spacex satellites blockage was the surprise. How did they do it? I thought it would be the best dooms day kind of insurance. Turns out not.
5 hours ago
Spacex satellites blockage was the surprise. How did they do it? I thought it would be the best dooms day kind of insurance. Turns out not.
Supposedly it's high packet loss but still available to at least some extent. Or at least it was initially? Really highlights the importance of low bandwidth P2P capable messaging systems that support caching messages for later delivery as well as multiple underlying transports.
My wild guess is that jamming is local. Major cities may be fully jammed. To get an idea about GNSS jamming range (different signal of course, probably much easier to jam), there are maps online where you can see which parts of Europe are currently GNSS-jammed. But I have the same question as you.
> probably much easier to jam
Definitely much easier to jam. Much higher orbits for gnss satellites, much lower signal intensity.
Also, starlink uses phased arrays with beamforming, effectively creating an electronically steerable directional antenna. It is harder to jam two directional antennas talking to each other, as your jammers are on the sides, where the lobes of the antenna radiation pattern are smaller.
Still, we're talking about signals coming from space, so maybe it is just enough to sprinkle more jammers in an urban setting.. I'm curious as well.
You can jam the satellites, you can jam the receivers and you can jam GPS.
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RF and GPS jamming has been a solved problem for decades. As a SWE, we are all expected to take Physics E&M, Circuits, and CompArch in our CS undergrad - think back to those classes.
Genuine question, is it that easy to deploy these tools over a country that big?
Yes in most population centers. Any country that has the ability to stand up a cellular network has the ability to deploy jamming at scale.
The components needed to build jammers and EW systems have been heavily commodified for a decade now (hell, your phone's power brick, car, and TV all have dual use components for these kinds of applications), and most regional powers have been working on compound semiconductors and offensive electronic warfare for almost a generation now.
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