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To: major_gaff

Any guess on how Starlink overcame Russian jamming?
Change of frequency? Use of a frequency hopper?


12 posted on 04/28/2022 6:21:34 AM PDT by CapandBall
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To: CapandBall
that would be my guess...some advanced form of amplitude phase shift
keying...hard to jam what you what you can see.

Our old motto: VMAQ-2 IMA: 'They don't Jam until we say they can!'



Semper Fi.
15 posted on 04/28/2022 7:52:13 AM PDT by major_gaff (University of Parris Island, Class of '84)
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To: CapandBall

They overcame the jamming because the antennas are phased arrays with tight beams and low sidelobes. They updated the software to put a beam null point everywhere a jamming signals showed up thus rendering it null. That was at the satellites in the uplink side the down links are already fast moving tight beams and the ground terminals only track a tiny spot in the sky where the satellite is expected to be. To jam a ground terminal you have to position your jammer along that beam line then keep up with it’s movement across the sky at 7+ miles per second nearly impossible. The secret sauce is in the beam forming at the phased arrays of those birds once you have active null control they become very difficult to jam. I would expect the up and down links to also be frequency agile to some extent as well since spacex was given a block of bandwidth.


17 posted on 04/28/2022 9:20:29 AM PDT by JD_UTDallas ("Veni Vidi Vici" )
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To: CapandBall

I’ll bet he sacrificed some funtionality, capacity and/or efficiency to harden the system.


20 posted on 04/28/2022 1:01:50 PM PDT by Theophilus (Convoy!)
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