Juliusz, see the Twitter thread I linked to, it explains precisely the jamming scenarios they could be facing, and how they are possible.

Best,

Mike
On Oct 14, 2022 at 15:11 +0200, David Lang via Starlink <starlink@lists.bufferbloat.net>, wrote:
> satellites are visible from a wide area, and if you are talking about jamming
> the Ukrainian Army, they are going to be close enough to affect ground stations
> as well.
>
> On Fri, 14 Oct 2022, Juliusz Chroboczek wrote:
>
> > > you need to provide the rest of the information, namely that Russia is
> > > actively jamming communications.
> >
> > Interesting, I wasn't aware that they have the capability to do that in
> > areas that they do not control. Do you have any further information?
> >
> > -- Juliusz
> >
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