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 ============= > On 6/26/12 4:42 PM, J. Forster wrote: >> IMO, your failure rate estimate does not include the probability that >> some >> people might not like being spied on by UAVs. >> >> I can easily see a market for ground based GPS jammers, especially, in >> the >> more rugged, fertile, and inaccessible areas of California. > > > The GPS antennas on the UAVs face up, and have a (not very deep) null > facing down, so those rustic farmers are going to need a fair amount of > power facing up... > > (and besides, why do it outside, when you can inexpensively rent large > industrial concrete tilt-up buildings with water, heavy power, and a > loading dock..) > > And, as far as remote sensing goes.. commercial overhead imagery from > aerial photo and satellites (SPOTimage, etc) is sufficiently good to > detect this kind of thing (as well as things like unpermitted swimming > pools on which property tax is not being paid). > > > _______________________________________________ > 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.
