Radar Scrambling

[Tuck]

At 14:27 04/23/97 -0500, you wrote:
>
>>> Also Lidar's frequency is in the public domain, meaning you are allowed
to jam
>>> it legally.
>>
>>Well, not exactly 'allowed to jam it legally'  (interfering with a law 
>>enforcement officer, or something like that), but if you built a garage
door 
>>opener that works off a 908nm beem of ir led, 20ns pulses at 1KHz, and
could 
>>demonstrate that that was the primary purpose of your device, and it just
so 
>>happen to jam lidar....
>>(specs from memory, I believe the wavelenght is around 900nm.  Have not
seen any 
>>solid state lasers in that range, though :-(
>
>that's interesting data .... where'd you get it and can
>you validate it?  Also, what makes one think sending out
>the signal won't just get you a ticket for doing 375 mph
>in a 55 mph zone ???

Car and driver ran a test of a laser jammer a few months ago that used its
own laser instead of a bunch of IR LED's.  On a black firebird with no
front plate the thing effectively rendered the car invisible to laser.  Of
course their tests of passive jammers have always shown that they never
work.  One of the funniest tests I saw of those things was when they put a
whole bunch of them, like a dozen or so, on the dash of some car and drove
it at the radar gun and it didn't do a damn thing.


Justin "Tuck" Cordesman
SOLID BRASS-> Attraction is composed of desire and danger.

"The truth is that men who say that they wish to go out with a bang have a
wisdom that their fellows do not.  For they alone understand that when
death takes them, it must be that he has snuck up upon them and struck them
down with a single blow.  If they are left alive and die slowly -
lingering, then they know that they die because they had the chance to
fight death and they have failed.  They know that death has stolen their
will.  This is the greatest shame that a man who lusts for life can know."

	-Tuck (?-), Earth Leader. Lecture to the Huddled Masses, #1 (1997).