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How to Hide from a Drone

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Re: How to Hide from a Drone

#51

Post by wazoox »

willvarfar wrote: post #43
jdc wrote: post #21

Earlier quoted context omitted.

Detection and Localization of Multiple R/C Electronic Devices Using Array Detectors [1] Locating Noncooperative Radio Receivers Using Wideband Stimulated Emissions [2] A Practical Superheterodyne-Receiver Detector Using Stimulated Emissions [3] 1. https://ieeexplore.ieee.org/abstract/document/6857348 2. https://ieeexplore.ieee.org/document/6329437 3. https://ieeexplore.ieee.org/document/5699393

The book Spycatcher details how, in the 50s, MI5 developed systems to detect radio receivers. They fitted out vans and drove past embassies to determine the frequencies different embassies were tuned into. I think they also tested with fitting out aircraft, but it’s a long time since I read the book. Of course there is also the opinion that tv detector vans were a hoax and would never work, so ymmv :)

A good friend of mine had the chance to see such a van while working for the French Navy. The operator even showed him a (somewhat blurry) real-time view of my friend's Mac desktop in the building next door... (This happened in the early 90s in Toulon arsenal).

Re: How to Hide from a Drone

#52

Post by nullc »

hk__2 wrote: post #36
doctorfoo wrote: post #23

Earlier quoted context omitted.

Instead, those responsible for revealing it have spent considerable time, and still are, in jail.

> Instead, those responsible for revealing it have spent considerable time, and still are, in jail. Not entirely true: Chelsea Manning was released in 2017.

> Chelsea Manning was released in 2017.

After her sentence was commutated by Obama, otherwise she would be in prison until at least 2045.

She was recently placed back in jail for refusing to testify against Assange (instead referring the prosecution to her prior testimony), though she was released again after a year.

I wouldn't take a bet against her ending up back in jail for a similar attempt at intimidation once the sham court in the UK sends Assange to the US to be executed for distributing the above video to the world.

Re: How to Hide from a Drone

#53

Post by russholmes »

b112 wrote: post #25
ohazi wrote: post #24

Earlier quoted context omitted.

> In the 80s, 30+ years ago, license plates were discernible from orbit. This is absolutely false.

https://www.theatlantic.com/technology/archive/2011/12/top-s... It was also known by the likes of William Safire that our satellites could "read the license plates on the cars of Kremlin officials." -- If untrue, please provide a counter source to many of the like statements as cited above. (You may be right, but it seems that many believe you are wrong)

The Rayleigh limit in spatial resolution of an image forming device is given by:

l = 1.22 * λ * L / D

Where λ is wavelength, L is distance and D is optical element diameter.

For satellite at an altitude of 150 km with 2.4 m diameter mirror and 0.4 μm blue light, this gives a spatial resolution of 0.3 m. To read a number plate requires an order of magnitude better than this.

Re: How to Hide from a Drone

#54

Post by ashtonkem »

alacombe wrote: post #33
noodlesUK wrote: post #11

Whilst I’m sure there are opsec protocols that can do something to protect you from modern (military style) drones, it’s very very very hard to stop an adversary with a nearly unlimited amount of money and incredible technological superiority from keeping their eyes on you once you’re in their sights.

Yet, the US has pretty much been kept at bay from Irak and Afghanistan, go figure... In general, the US army is not equipped for guerilla-style warfare, and especially not on US soil. Local PD are another story on this point, but far less equipped.

On one hand it’s clear that a guérilla campaign is fully capable of resisting a first class army for a long period of time; this has been clear since the 1970s. What people tend to ignore is that the defenders do this while sustaining much higher casualties. Oh, and civilian casualties are typically an order of magnitude higher because high explosives aren’t very discriminatory.

On one hand, that’s an interesting discussion about modern warfare. On the other it is not a convincing argument about how you shouldn’t be too worried about the US military, because while a guérilla campaign might be able to stop them, it would only work after getting hundreds of thousands of people killed in your country. Not exactly a comforting argument.

Re: How to Hide from a Drone

#55

Post by IshKebab »

wazoox wrote: post #51
willvarfar wrote: post #43

Earlier quoted context omitted.

The book Spycatcher details how, in the 50s, MI5 developed systems to detect radio receivers. They fitted out vans and drove past embassies to determine the frequencies different embassies were tuned into. I think they also tested with fitting out aircraft, but it’s a long time since I read the book. Of course there is also the opinion that tv detector vans were a hoax and would never work, so ymmv :)

A good friend of mine had the chance to see such a van while working for the French Navy. The operator even showed him a (somewhat blurry) real-time view of my friend's Mac desktop in the building next door... (This happened in the early 90s in Toulon arsenal).

That sounds like Tempest, and I somehow doubt that they actually showed him that.

Re: How to Hide from a Drone

#56

Post by AYBABTME »

noodlesUK wrote: post #11

Whilst I’m sure there are opsec protocols that can do something to protect you from modern (military style) drones, it’s very very very hard to stop an adversary with a nearly unlimited amount of money and incredible technological superiority from keeping their eyes on you once you’re in their sights.

Yet military UAVs lose track of lots of targets during engagements in theatre. Foliage (thick), buildings and culverts do the trick. Mixing in crowds does the trick too (in low light).

Re: How to Hide from a Drone

#57

Post by DarthGhandi »

01100011 wrote: post #3

I don't know if it would be effective at hiding you beyond the next few years when more comprehensive systems are in place, but I think a simple circuit that randomly blinks an IR LED would be handy. Something like an an LED throwie, but with random cycling. Put a bunch of them around and you'll probably screw up most cheap CCDs by forcing them to constantly adjust their exposure. Sure, a cheap filter can defeat them…

This is the insanely stupid top voted comment I've come to expect from this site.

> How to hide from a drone?

"Shine bright IR flashlights at it in a 100m radius around your position"

Get the feeling if someone was dropping 100yr old mortars on you this still isn't a viable option.

I try my best not to get personal but this is so fucking dumb that it almost feels like malicious advice for the current hot warzones that exist right now.

Re: How to Hide from a Drone

#58

Post by ISL »

russholmes wrote: post #53
b112 wrote: post #25

Earlier quoted context omitted.

https://www.theatlantic.com/technology/archive/2011/12/top-s... It was also known by the likes of William Safire that our satellites could "read the license plates on the cars of Kremlin officials." -- If untrue, please provide a counter source to many of the like statements as cited above. (You may be right, but it seems that many believe you are wrong)

The Rayleigh limit in spatial resolution of an image forming device is given by: l = 1.22 * λ * L / D Where λ is wavelength, L is distance and D is optical element diameter. For satellite at an altitude of 150 km with 2.4 m diameter mirror and 0.4 μm blue light, this gives a spatial resolution of 0.3 m. To read a number plate requires an order of magnitude better than this.

Thus an interferometric imaging system can theoretically do it ( two input scopes separated by 24m). The hard part is the atmosphere.

Re: How to Hide from a Drone

#59

Post by tomohawk »

jonas21 wrote: post #2

"Stand over broken glass"? "Keep an umbrella handy"? Really?

Here's a video of some rioters using umbrellas as cover to mask their approach and launch an attack on police.

https://www.youtube.com/watch?v=U1VdhQbfSTY&feature=youtu.be

Seems pretty effective on the ground, but the drone footage shows what they're actually up to.

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