Re: [Starlink] Starlink no longer available to the Ukrainian army?

[Mike Puchol <mike@starlink.sx>]

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Pumping out RF at fairly high power levels, and pointing an antenna at a satellite, are both things very easy to do for someone like Russia. To then jam 500 MHz of spectrum all at once is not that trivial, and one can get creative, eg by only attacking the reference subcarriers in OFDM, thus concentrating RF power on those, rather than the whole channel.

There are some papers written around jamming LTE by attacking specific resources instead of the whole band, making the attack less conspicuous, something similar could be applied against Starlink. By not using brute force, you also make the attack harder to detect and counter.

My view is that Russia is not worried about being noticed, and just applies brute force.

Best,

Mike
On Oct 14, 2022 at 20:26 +0200, Juliusz Chroboczek <jch@irif.fr>, wrote:
> > Juliusz, see the Twitter thread I linked to, it explains precisely the
> > jamming scenarios they could be facing, and how they are possible.
>
> I saw it after I wrote my question, and it does explain a lot. Thanks.
>
> Do you have an idea how difficult it is to actually do in practice? Is it
> a simple matter of plugging a second-hand VSAT dish to an old amateur
> radio rig, or do you actually need to be a research lab of the Moscow
> Academy of Sciences to do it?
>
> -- Juliusz

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