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.
