KISS guys. Suppose the Iranians had one of their buddies watching the drone base. When they saw a drone take off, the guy just called a contact by cell and the Iranians turned on a wide coverage jammer somewhere along the flight path.
>From previous incidents and observations, if the drone came into the jammed area, it'd lose GPS lock, orbit, and run out of gas and crash. They could easily select a jammer site that was good for recovery. FWIW, -John ================ > Hi, > >> Of course, but then when you switch on your transmitter you are on your >> own. Considering the speed of a drone (700Km/h?) you need a great >> coverage, so much RF power out. > > Easy: Use a dish antenna on the transmitter. > Very directional with large ampification. > If using a 'moderate' opening angle, just pointing the dish at the drone > by hand will work. > After starting the system locked to the gps time, once the signal is on > the drone, > I don't think it matters anymore. (It might not even matter at the start?) > The drone will follow the timing of the jammer. > As the drone will receive all signals from the single transmitter, the > relative timing will be fixed. > Just using a OCXO will have a good enough short time stability to allow > the system to work, I would think. > As the plan is to land or jam the drone within say 10 minutes, long term > stability is not that important... > > Greetings, > Pieter. >> >> On Fri, Dec 16, 2011 at 12:22 AM, J. Forster <[email protected]> wrote: >> >>> >>> >>> You could just have a GPS receiver and use that to sync up the jammer. >>> >>> -John >>> >>> ============== >>> >>> >>> > >>> > To transmit a GPS cluster signal you need a GPS simulator to generate >>> > the cluster so even a single transmitter can do this, the relative >>> > timing and not the different positions of the transmitters is what >>> the >>> > receiver sees. >>> > >>> > When over-powering the real birds you just needs to be close enough >>> in >>> > timing, and it is the location of the target which is of interest. >>> > >>> > If this scenario is true... then they have not done their home-work. >>> I >>> > would ask a number of critical questions already from my civilian >>> > background. >>> > >>> > Cheers, >>> > Magnus >>> > >>> > _______________________________________________ >>> > 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. >>> > >>> > >>> >>> >>> >>> _______________________________________________ >>> 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. >>> >> _______________________________________________ >> 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. >> > > > > _______________________________________________ > 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. > > _______________________________________________ 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.
