Interesting this idea: mounting a bottom GPS antenna to check for unexpected signals... and you don't need a complete GPS receiver maybe only a sort of selective field strength meter or something like the codeless GPS receiver used by Vaisala on their radiosondes.
On Wed, Jun 27, 2012 at 6:45 AM, gary <[email protected]> wrote: > Mount a GPS antenna on the bottom of the UAV. If you get strong signals > from that antenna, assume information assurance has failed. > > There are countermeasures, and of course counter-counter-measures. > > Here is a photo of a predator spying on me: > >> http://www.lazygranch.com/**images/mafex_nov2010/predator_**2.jpg<http://www.lazygranch.com/images/mafex_nov2010/predator_2.jpg> >> > > > > On 6/26/2012 8:16 PM, J. Forster wrote: > >> The smaller path loss from the ground to a UAV v. UAV to satellite easily >> trumps the front/back ratio of most all antennas. >> >> -John >> >> ============= >> > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
