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Re: Re: Radar scramblers
DeWitt Harrison firstname.lastname@example.org wrote:
Adding the additional complication of doppler shifted return signal does
not overcome the fundamental flaw in passive radar/lidar "jamming" devices.
Whatever sort of reflected signal is returned from a doohickey equipped
car will consist almost entirely of "car" and virtually nothing of "doohickey."
Signal-to-noise-ratio. All you have to do is measure the square meters
of the car's frontal area and compare it to the area of the passive reflecting
device. That ratio is signal to noise. If we ignore the windshield area which
may not be a good radar/lidar reflector, I think the car-to-doohickey-ratio
would be something like 2 square meters divided by 0.0005 square meters.
Fudge all you want, but the cop's supersensitive-califragilistic zapper will
see all car and no doohickey. What we have here is a modern day sequel
to "The King's New Clothes." What is really needed is an inexpensive and
legal radar/lidar/ovloV homing tactical nuclear missile. Cheers,
The operative word is corner reflector. I won't speak to radar, not my bag, but
your average bicycle reflector (made up of zillions of mini corner reflectors)
has an optical crosssection of roughly 100 meters squared. And it only occupies
an area of 0.0025 meters squared.
The above comment is not intended to support the idea of passive jamming (a
contradiction in terms). Passive countermeasuring may be doable, but is usually
difficult for a variety of reasons. Better to transmit a deceptive or
interfering signal. However, if you want to avoid being an obvious jammer, you
have to transmit a signal that looks like the return expected by the
radar/lidar, but which supplies erroneous (but consistent) data.
An ovloV homing tactical nuclear missile - that would be even better than the
GAU-8 (30 mm Gatling gun) I always wanted.
*** ...Kirby (Kirby A. Smith) ***
*** 2 X 1988 90q ***
*** email@example.com ***
*** [=] firstname.lastname@example.org ***
*** Opinions expressed herein are entirely those of the author. ***