Hi Radar bounces off the flat sides very nicely ….
Bob On Dec 15, 2011, at 7:41 PM, J. Forster wrote: > Maybe you can hear them taking off? > > -John > > ============= > > >> Hi >> >> Hard to detect looking horizontally, pretty easy looking straight up (or >> straight down from above it). >> >> Bob >> >> >> On Dec 15, 2011, at 7:14 PM, gary wrote: >> >>> Kandahar has proven poor opsec since the thing was photographed! I don't >>> know about the base in Baluchistan. >>> >>> But even knowing the launch doesn't mean they know when it is on target. >>> Supposedly the UAS is stealthy, so it would be hard to detect. >>> >>> >>> On 12/15/2011 4:00 PM, J. Forster wrote: >>>> 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. >>>> >>> >>> _______________________________________________ >>> 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.
