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Comment: Re:Frickin' Lasers! (Score 1) 228

by prisoner-of-enigma (#48925075) Attached to: White House Drone Incident Exposes Key Security Gap

You can get around this by using an array of lasers, each of which is individually rather harmless, but focused together would be enough to destroy such a target. The "danger area" would be restricted to the focal point. Anything outside/beyond/inside that point would receive much less laser power and likely escape damage.

Now if your drone is using active terrain masking, that makes it more difficult to hit at range. However, such a system would probably require a human remotely controlling it, making that susceptible to jamming. I don't think automated terrain avoidance (in real time) is practical just yet for anything a non-military entity could get its hands on. And in any event, such a terrain-avoidance system would likely need its own sensors (radar/lidar) which could be detected, jammed, or both.

Comment: Re:Stronger regs ? Try a better radar (Score 1) 228

by prisoner-of-enigma (#48924983) Attached to: White House Drone Incident Exposes Key Security Gap

If you shield a drone it becomes heavier and then needs to be bigger. Also at that point the drone needs to either be self guiding or have a communication/control system that won't be knocked out. You get the old little more weight little more propulsion to carry the weight cycle going and all of a sudden your drone isn't small anymore.

So what's your point? That a more capable drone is also bigger? So? So what? That's obvious. Do you think the added size/complexity of such a thing would be any impediment whatsoever to a determined aggressor? If you want to penetrate controlled airspace to do something nefarious, you're perforce going to want something that's difficult to detect, difficult to jam, difficult to shoot down, and has enough payload to carry whatever you need to cause the damage you're looking for.

That seems an incredibly strong statement. So strong that it looks like it doesn't have enough thought behind it.

Really? Then let's hear your alternative options. I already covered sensors and weapons, but let's recap. Radar is vulnerable to stealth, so it won't do the job alone. Lidar is too short ranged to do the job alone. Acoustic is even worse. But put together, a web of such sensors would be very difficult to overcome. If there are other sensors out there that are even remotely applicable, please enumerate them.

As for weapons, you have only three options: ballistic, missiles, or directed-energy weapons. Ballistic weapons have all kinds of downsides, from trajectory computation to wind to limited ammo, not to mention the inevitable collateral damage from misses (of which there will be MANY). Missiles have similar downsides. DEW's have (almost) none of these, the sole one being the potential for (minor) collateral damage in the case of a miss. You could even potentially mitigate this by using an array of low-power lasers, individually almost benign, but focused together to take down a drone.

Comment: Re:radar would have no problem distinguishing quad (Score 1) 228

by prisoner-of-enigma (#48924865) Attached to: White House Drone Incident Exposes Key Security Gap

This assumes you can get a good doppler signature on the rotors at all. I'm not an expert on radar/stealth construction, but I know a fair bit about it. A rotor made of radar-transparent (or absorbent) material would make it rather hard to detect, at least until it was well within range to do damage.

Comment: Re:Stronger regs ? Try a better radar (Score 1) 228

by prisoner-of-enigma (#48915041) Attached to: White House Drone Incident Exposes Key Security Gap

So please tell why a radar system would be in some way inadequate to detecting drones, or even operating in an offensive mode to burn out their electrical systems.

Small drones with significant non-metal construction will be more or less indistinguishable from birds. And it's not a stretch to imagine "stealth" drones specifically constructed or modified to mitigate radar.

Using a radar offensively, aka an EMP weapon, is a possibility, but shielding electronics is also a possibility. You'd need a very powerful signal to defeat that, and operating such a thing in a civilian area could lead to all kinds of unintended damage.

Radar, backed up by lidar and acoustic sensors, is the best route. Threat mitigation is best handled by a point defense laser. End of story.

Comment: Frickin' Lasers! (Score 1) 228

by prisoner-of-enigma (#48914915) Attached to: White House Drone Incident Exposes Key Security Gap

Not to go all Dr. Evil on the subject, but the Navy *does* have some recently-deployed point defense laser technology designed to shoot down incoming cruise missiles. These tiny drones aren't manned and they're violating what might be the most restricted airspace in the country outside of Groom Lake; there's nothing legally preventing them from being shot down by said laser. That's a far better course than trying to do it ballistically or with something like a Stinger missile, both of which would have a hard time hitting something small and have issues with what happens to the round if it misses (i.e. falls on a civilian).

Comment: Re:Didn't we have this discussion... (Score 1) 290

by Mashiki (#48858379) Attached to: Police Nation-Wide Use Wall-Penetrating Radars To Peer Into Homes

They tried this in Canada with thermocams. The supreme court hit them so hard on that being a warrantless search that crown attorneys and police services across Canada are still smarting over it. There is precedent, and legal justifications are often carried from other countries on things like this.

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