Re: [Starlink] Starlink cheaper in Colombia,cand gps spoofing

[Oleg Kutkov <contact@olegkutkov.me>]

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There is also interesting behavior. If you physically disconnect the 
Starlink GNSS receiver from the SoC, it still connects to the Starlink 
satellites, but it takes up to 20-25 minutes. It looks like there is 
some fallback mechanism, like RF sync on their own satellites.

But for normal operation, they use GNSS (GPS + Galileo) to set the 
system time faster.

On 1/1/23 19:09, Mike Puchol via Starlink wrote:
> I can confirm that spoofing with “non-milspec” methods don’t seem to 
> work against the receiver in the Starlink terminal. I tried with a 
> HackRF and a USRP and it didn’t work, while an Android phone was 
> spoofed fine. I was however able to jam the receiver with very 
> moderate power levels and a sweep generated with a HackRF Portapack 
> and patch antenna.
>
> Best,
>
> Mike
> On Jan 1, 2023 at 17:23 +0100, Benjamin Henrion via Starlink 
> <starlink@lists.bufferbloat.net>, wrote:
>> Le dim. 1 janv. 2023 à 12:49, Oleg Kutkov via Starlink 
>> <starlink@lists.bufferbloat.net> a écrit :
>>
>>     Hi,
>>
>>     Starlink has a multisystem GNSS receiver with data filtering, so it
>>     can't be fooled with the single HackRF (i tested it).
>>
>>
>> Here they describe another method with gps jammers:
>>
>> https://gpspatron.com/spoofing-a-multi-band-rtk-gnss-receiver-with-hackrf-one-and-gnss-jammer/
>>
>>
>>     I experimented with NMEA data injected directly into the Dishy
>>     operating
>>     system, so I can tell there is no way to cheat the system.
>>     Satellites know your location a wouldn't accept a connection from the
>>     client in an unexpected Cell. All connection slots for all
>>     clients and
>>     areas are scheduled.
>>
>>     Besides this, Starlink requires valid and strict GNSS and 1PPS to
>>     sync
>>     the local clock, that's vital for the TDD system.
>>
>>
>>     On 1/1/23 13:18, Benjamin Henrion via Starlink wrote:
>>     > Hi,
>>     >
>>     > Just wondering if you could pay less by pretending to be in
>>     Colombia
>>     > by spoofing gps sats with a HackRF board:
>>     >
>>     >
>>     https://mobile.twitter.com/GeoffreyHuntley/status/1609490537484275712
>>     >
>>     > Best,
>>     >
>>     > _______________________________________________
>>     > Starlink mailing list
>>     > Starlink@lists.bufferbloat.net
>>     > https://lists.bufferbloat.net/listinfo/starlink
>>
>>     --
>>     Best regards,
>>     Oleg Kutkov
>>
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-- 
Best regards,
Oleg Kutkov

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