[SystemSafety] GPS jamming

Olwen Morgan olwen at phaedsys.com
Sat Jul 13 22:38:37 CEST 2019

You *cannot* compute a correction to any signal of whose value you are 
not aware, because you do not know by what amount that signal deviates 
from the true, or at least a better, value.

Local spoofing requires *technically different* countermeasures.


On 13/07/2019 21:06, Martyn Thomas wrote:
> How woul;d a ground station that did not see the spoofed signal
> calculate an appropriate correction?
> Martyn
> On 13/07/2019 11:18, Peter Bishop wrote:
>> I am not an expert, but I understand EGNOS works out corrections to
>> standard GPS signals
>> based on a limited number of ground stations (who obviously know where
>> they are).
>> If spoofing is in a localised area, the ground stations (located
>> elsewhere) would not see the spoof (just the regular satellite
>> signals), so the resultant broadcast Egnos correction data would just
>> make a small correction to the spoofed GPS signal.
>> Or have I got this completely wrong?
>> Peter Bishop
> _______________________________________________
> The System Safety Mailing List
> systemsafety at TechFak.Uni-Bielefeld.DE
> Manage your subscription: https://lists.techfak.uni-bielefeld.de/mailman/listinfo/systemsafety
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.techfak.uni-bielefeld.de/mailman/private/systemsafety/attachments/20190713/c2077897/attachment-0001.html>

More information about the systemsafety mailing list