Hi Having spent a lot of my life designing GPSDO’s it’s a “that depends” sort of thing. For a simple noise jammer, yes, they pretty much all will go into holdover. When the jammer goes away, they come out of holdover. There are a few older units that may not do quite as well with various sorts of broadband jamming. With a spoofing jammer that is flying around overhead and simulating an entire constellation … you could see any of them do odd things. An airborne jammer flying over this or that city likely gets you into a “act of war” sort of issue. It’s something you build if you are a nation state.
The performance with noise jammers is not a guess. It’s based on field experience and all those never ending meetings I keep referring to ….. Bob > On Aug 31, 2018, at 12:04 PM, Mark Spencer <m...@alignedsolutions.com> wrote: > > Hi: > > I'm curious if anyone knows how typical GPSDO's are likely to respond to > simple GPS jammers ? Could the GPSDO be reasonably expected to go into hold > over ? > > The use case I am thinking is along the lines of: > > -A commercial operation relies on a GPSDO for timing at a remote site. > > -A vehicle with a simple GPS jammer (perhaps intended by the vehicle driver > to defeat a GPS tracking system installed near the vehicle) parks near the > GPS antenna. > > I'm thinking one likely outcome is the GPSDO goes into hold over and when the > vehicle moves away it exits hold over ? This is all just speculation on my > part. > > Comments ? > > Thanks > Mark Spencer > > m...@alignedsolutions.com > 604 762 4099 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
