Anti radar idea.
Author
Discussion

deltaf

Original Poster:

6,806 posts

276 months

Tuesday 24th August 2004
quotequote all
Ok we have all had various thoughts on how to defeat these basts but here's one that i havent heard mentioned. Apologies if its anyones idea on here.
I am shortly about to test the Mark1 radar disruptor.
It consists of a small firecracker charge inside an aluminium tube fired by a model rocket motor squib (model shops sell em, totally legal as are firecrackers or even partypoppers!).
On top of the micro-charge is a small collection of shredded anti static bags, the silver metallised ones that you get your motherboard and other static sensitive devices in.
The Bags are shredded using an ordinary shredder that cross-cuts them into tiny squares, before you load in an of eggcupfull.
In other words its a " chaff" dispenser.
Refinements will surely follow if it works as the cloud of chaff at say 60 would be much larger than a car and may completely confuse the enemy radars rendering them into a confused state.
The plan would ultimately be to test and see if it masks correctly in the real world.

Dam my head hurts..........

>>> Edited by deltaf on Tuesday 24th August 18:53

boredpilot

478 posts

261 months

Tuesday 24th August 2004
quotequote all
Great, now ive got another job to start. If only people wouldnt come up with great ideas and I wouldnt have to go and try and build them.

deltaf

Original Poster:

6,806 posts

276 months

Tuesday 24th August 2004
quotequote all
JKust dont point it at yourself, if it goes pop in your face, youll look all..well..."glittery"...

V6GTO

11,579 posts

265 months

Tuesday 24th August 2004
quotequote all
I think it would need to be a pretty good charge to punch out a decent cloud of chaff into a 60mph wind, and the car would overtake it in a split second so the radar can get a second bight of the cherry. Sorry to be a downer, Martin.

deltaf

Original Poster:

6,806 posts

276 months

Tuesday 24th August 2004
quotequote all
V6GTO said:
I think it would need to be a pretty good charge to punch out a decent cloud of chaff into a 60mph wind, and the car would overtake it in a split second so the radar can get a second bight of the cherry. Sorry to be a downer, Martin.


It goes out the back....

Balmoral Green

42,557 posts

271 months

Tuesday 24th August 2004
quotequote all
And on top of all that, they nick you for littering too

sheepy

3,164 posts

272 months

Tuesday 24th August 2004
quotequote all
If I recall correctly (over ten years since I did this sort of stuff), chaff needs to be the correct size for the wavelength of the radar being used.

Also, chaff just creates false returns, these may trigger the camera and you'd end up in a pile of something smelly!

More fun is to give some kids a tin can on a string and get then to whirl it round their heads whilst standing in front of the gatso. Hey presto loads of piccys showing kiddies having a laugh!!!!

Sheepy

deltaf

Original Poster:

6,806 posts

276 months

Tuesday 24th August 2004
quotequote all
sheepy said:
If I recall correctly (over ten years since I did this sort of stuff), chaff needs to be the correct size for the wavelength of the radar being used.

Also, chaff just creates false returns, these may trigger the camera and you'd end up in a pile of something smelly!

More fun is to give some kids a tin can on a string and get then to whirl it round their heads whilst standing in front of the gatso. Hey presto loads of piccys showing kiddies having a laugh!!!!

Sheepy


Might do it meself yet with a big full moon...

motco

17,362 posts

269 months

Wednesday 25th August 2004
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A while ago a business acquaintance came to me and asked me if my company could make a device for him, the circuit design for which he already had, that "blinded" Gatsos by detecting the Gatso's camera flash and firing a flash back at it instantaneously - twice, of course. The idea was to grossly overexpose the film and obliterate the image. It could have been too slow, of course, dependent upon the shutter speed in the Gatso. Naturally, being a God-fearing, public spirited company we declined to make it; yes, really! Such a device has since been made in USA and incorporated into a baseball cap for "celebs" to wear when on clandestine liaisons with other clebs so that paparazzi cameras cannot photograph them. Nice to know the respective priorities either side of the pond, isn't it?

Cooperman

4,428 posts

273 months

Wednesday 25th August 2004
quotequote all
motco said:
A while ago a business acquaintance came to me and asked me if my company could make a device for him, the circuit design for which he already had, that "blinded" Gatsos by detecting the Gatso's camera flash and firing a flash back at it instantaneously - twice, of course. The idea was to grossly overexpose the film and obliterate the image. It could have been too slow, of course, dependent upon the shutter speed in the Gatso. Naturally, being a God-fearing, public spirited company we declined to make it; yes, really! Such a device has since been made in USA and incorporated into a baseball cap for "celebs" to wear when on clandestine liaisons with other clebs so that paparazzi cameras cannot photograph them. Nice to know the respective priorities either side of the pond, isn't it?

Cooperman

4,428 posts

273 months

Wednesday 25th August 2004
quotequote all
motco said:
A while ago a business acquaintance came to me and asked me if my company could make a device for him, the circuit design for which he already had, that "blinded" Gatsos by detecting the Gatso's camera flash and firing a flash back at it instantaneously - twice, of course. The idea was to grossly overexpose the film and obliterate the image. It could have been too slow, of course, dependent upon the shutter speed in the Gatso. Naturally, being a God-fearing, public spirited company we declined to make it; yes, really! Such a device has since been made in USA and incorporated into a baseball cap for "celebs" to wear when on clandestine liaisons with other clebs so that paparazzi cameras cannot photograph them. Nice to know the respective priorities either side of the pond, isn't it?


That should work well as the Gatso flashes twice and detection of the first flash could trigger the counter-flash to prevent the second flash from working properly.
However, the real risk now is not the Gatsos, but the Talivans and the Truvelos. A GPS loactor will take care of all Gatsos and truvelos, but the vans need jamming or some other form of challenge, like the PACE caution argument.

ATG

22,989 posts

295 months

Wednesday 25th August 2004
quotequote all
I think the chaff idea might well work. Don't know if antistatic bags conduct well enough, but the principal is fine. You will need to cut the strips to the correct length for the frequency of the radar. I assume Gatsos use microwaves, so this is going to be easy coz the wavelength will be of the order of centimetres. I assume Gatsos wait for you to drive by before they measure your speed with the radar? If so, a large cloud of stationary chaff will give a 0mph reflection ... exactly what you want.

Better still, your litter will provide a public service coz each subsequent car that drives by will probably throw the chaff back up into the air behind thus shielding that car from detection too. This is known as recycling and is therefore both PC and green.

sheepy

3,164 posts

272 months

Wednesday 25th August 2004
quotequote all
ATG said:
I assume Gatsos use microwaves, so this is going to be easy coz the wavelength will be of the order of centimetres.
Gatsos don't use microwaves, they use K (Ka/Ku) and X band radar (depending on country of use).

X band is 8-12 GHz so wavelength is 2.5-4 cm
K band is 12-18 Ghz or 27-40 Ghz (can't remember which is u or a), wavelengths are 1.7-2.5 cm and 0.75-1.2 cm.

The gap in K band is something to do with water vapour attenuation.

ATG said:
I assume Gatsos wait for you to drive by before they measure your speed with the radar? If so, a large cloud of stationary chaff will give a 0mph reflection ... exactly what you want.
Chaff works by creating false returns from the fluttering stands. These false returns could be seen as a range of speeds which could just trigger the gatso anyway. I think that the best you could hope for is that the sensor gets confused and doesn't fire.

You could of course cut up a few bags to strips of varying lengths between 0.37 and 2cm and try throwing a few handfuls into the air in front of a camera to see what happens (purely for the scientific research of course).

HTH

Sheepy

robocop

489 posts

260 months

Wednesday 25th August 2004
quotequote all
Balmoral Green said:
And on top of all that, they nick you for littering too


...and for discharging a Firearm within 50ft of the centre of the carriageway! Sect161(2) Highways Act 1980

Rgds

motco

17,362 posts

269 months

Wednesday 25th August 2004
quotequote all
X band and K band ARE microwaves, or K band might be called millimetre waves. RADAR is Radio Detection And Ranging - not quite the same.

deltaf

Original Poster:

6,806 posts

276 months

Wednesday 25th August 2004
quotequote all
robocop said:


Balmoral Green said:
And on top of all that, they nick you for littering too




...and for discharging a Firearm within 50ft of the centre of the carriageway! Sect161(2) Highways Act 1980

Rgds



Firearm? Where? Itd be a firecracker, firework, partypopper. Not a "firearm". Itd not be a weapon, couldnt be used as a weapon and wouldnt be a weapon.

Weapon
(n.) An instrument of offensive of defensive combat; something to fight with; anything used, or designed to be used, in destroying, defeating, or injuring an enemy, as a gun, a sword, etc.

Btw you could use mylar sheets, like heatblankets instead of the bags as theyve got more metallic content to em.

Ps, instead of using pyrotechnical means, use compressed air burst to power the load out. No "fire" issues to confuse us.

How much for littering though?

>> Edited by deltaf on Wednesday 25th August 18:43

kenp

654 posts

271 months

Wednesday 25th August 2004
quotequote all
motco said:
A while ago a business acquaintance came to me and asked me if my company could make a device for him, the circuit design for which he already had, that "blinded" Gatsos by detecting the Gatso's camera flash and firing a flash back at it instantaneously - twice, of course. The idea was to grossly overexpose the film and obliterate the image. It could have been too slow, of course, dependent upon the shutter speed in the Gatso. Naturally, being a God-fearing, public spirited company we declined to make it; yes, really! Such a device has since been made in USA and incorporated into a baseball cap for "celebs" to wear when on clandestine liaisons with other clebs so that paparazzi cameras cannot photograph them. Nice to know the respective priorities either side of the pond, isn't it?

Well the man was a fool, because he could have walked into any decent photography shop and bought a slave flash. Photographers frequently light a scene with several flashes. The camera triggers the master flash and the flash given off by the master triggers all the slaves.
All you would have to do is mount this on your parcel shelf and the Gatso would act as the master.

wilkos

197 posts

261 months

Wednesday 25th August 2004
quotequote all
or buy a roll of bin bags and pay someone under thae age of criminal responsibility to go stick em over the cameras.

8Pack

5,182 posts

263 months

Thursday 26th August 2004
quotequote all
Heavy duty, black bin bags!! Ooh! Er! sorry Wilkos!! singing away to myself there! What's that all about then, Eh! I LIKE the idea though, OR even better! what about erecting a paper(radar transparent) sign saying: "Piss Off! You NEO - Fascist! EX - Army Bastards!!" or similar sentiment in front of EVERY Gatso in the land! EVERY speeding motorist would provide them with a NICE CLEAR MESSAGE!

BUT! the Klingons have it for me folks! Cloaking device! that's what we need! .... OR .......Stealth technology... that's it!

Stick lots of foam rubber to your car, then soak it in metallic paint and paint over with matt black paint. It'll look a bit strange at first, until the only one's left with a Licence is driving one! Aren't I? Britain in 2000+ Eh!! Driving on Alchofuel from Illicit Rape seed Alchohol("home brewing of" made Illegal in 2015)[tax evasion charge] But still!! The Esso sign means Happy motoring, the Esso sign means Happy motoring! call at the ESSO sign! It'll cost you MORE!!! See you there folks!!

towman

14,938 posts

262 months

Thursday 26th August 2004
quotequote all
8Pack said:
Heavy duty, black bin bags!! Ooh! Er! sorry Wilkos!! singing away to myself there! What's that all about then, Eh! I LIKE the idea though, OR even better! what about erecting a paper(radar transparent) sign saying: "Piss Off! You NEO - Fascist! EX - Army Bastards!!" or similar sentiment in front of EVERY Gatso in the land! EVERY speeding motorist would provide them with a NICE CLEAR MESSAGE!

BUT! the Klingons have it for me folks! Cloaking device! that's what we need! .... OR .......Stealth technology... that's it!

Stick lots of foam rubber to your car, then soak it in metallic paint and paint over with matt black paint. It'll look a bit strange at first, until the only one's left with a Licence is driving one! Aren't I? Britain in 2000+ Eh!! Driving on Alchofuel from Illicit Rape seed Alchohol("home brewing of" made Illegal in 2015)[tax evasion charge] But still!! The Esso sign means Happy motoring, the Esso sign means Happy motoring! call at the ESSO sign! It'll cost you MORE!!! See you there folks!!



Hmmmmmmmm. Time for bed I think! Hope your head isn`t too sore in the morning!

Steve