Eyes
Rolling strip searches: full body scan technology deployed in vehicles.
Remember, I do this to entertain me, not you.
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August 25th, 2010 at 10:19 am
Happen to know what materials will defeat the scan?
If it can see through vehicles, I presume a layer of aluminum isn’t good enough.
I predict professional criminals know the answers, and have answers including jamming equipment, long before law-abiding citizens.
August 25th, 2010 at 12:04 pm
They need to send that drone over here, where we have some good shots.
“Spy drone ain’t come back from Rocky Top; reckon it never will.”
August 25th, 2010 at 12:29 pm
“Millimeter waves” are radio waves like any other. While they are severely attenuated by even a layer of foil, there will be some leakage. But on the other hand a layer of metal strips laid a few mm apart should have enough refractive effect to seriously obstruct the view. And there are a number of RF absorbent materials that will do that job.
It would be both expensive and a lot of work to retrofit a house, less for a car, and not so much for new construction. But the best cure for that problem is to elect people who believe in privacy.
Stranger
August 25th, 2010 at 12:58 pm
The best material to defeat these radio waves would be the 4th Amendment.
August 25th, 2010 at 2:13 pm
This particular device uses backscattered X-Rays. This is why it can penetrate vehicles.
Defensively I’ll have to think on this some more but the first thing that comes to mind is lead vinyl sheets.
I want a set of “airplane clothes” made out of it.
Offensively the same sort of things you would use against any other vehicle would work.
August 25th, 2010 at 2:17 pm
best thing to defeat it is a quick moving curtain of lead.
August 25th, 2010 at 2:23 pm
In other news, Houston PD provides new dynamic targets for Sporting Clays fans.
August 25th, 2010 at 6:19 pm
There are several ways to absorb or diffract millimeter waves. And backscatter is just reflection, a la radar.
As I recall, the things transmit a 100 mHz sweep signal centered between 65 and 140 teraHertz. Outgoing signal passes through a fine grille that gives single direction polarization. The reflected signal is returned with semi-random polarization, and the return signal is reflected by the polarizing screen. Returns with the same polarization as the grille show up brightly on the detector, cross polarized reflections are dark. As are areas with no reflection.
In that frequency range, a wet sponge should do a fine job of absorption, as will certain ceramics, carbon fiber, and many other things. Of course, Big Brother’s Public Peepers might wonder why their images are all dark.
And the solution to that should be obvious.
Stranger