On 21/12/2018 8:58 AM, Roger Clarke wrote:
[I'm embarrassed to discover that my section on hostile uses of drones
included only "an individual drone could be deployed against an
aircraft during takeoff or landing, perhaps through a jet-engine
air-intake".
[It failed to discuss simple 'nuisance', e.g. close to airports:
http://rogerclarke.com/SOS/Drones-E.html#AHLD
On 21/12/18 13:19, JLWhitaker wrote:
I just read the update story that they still aren't open and are
bringing in the military. My thought was can't they trace the radio
signals? Or is that not possible?
I summarised 'defensive' measures here:
http://rogerclarke.com/SOS/Drones-E.html#AC
The first challenge is detection of the signal, and differentiation of
it from the massive amount of electromagnetic radiation in a near-urban
setting, and especially in the vicinity of a major airport.
There are large numbers of manufacturers of models of small drones
(although they may use only a limited number of control frequencies).
There are fewer numbers of the kinds of manufacturers and models of the
larger drones that the story reported as creating the problem. (There
could be small ones too; but visual sightings are harder, and the
airport radar may not pick them up).
This hasn't been a problem to date, so the UK's large number of
semi-independent law enforcement agencies may not have built a database
of that kind - and the regulator (CAA) may be as slack as CASA.
The second challenge is to get a fix on the source. That's probably
possible from a single-point detector, but it may be pushing the state
of the art - and it would appear that there's no such facility installed
at the airport in any case. So two detectors would need to be acquired
from somewhere, positioned at complementary locations, and maybe
re-calibrated, and the two sets of data used to compute the plot.
The third challenge is to plan and implement enough road-blocks fast
enough, and to then send in the pursuit vehicles to flush them out.
The eastern end is too congested, so there would be too many eyes for
the culprit(s) to escape detection for very long. The western end is
favourite, and there aren't many access roads, nor many places to hide:
https://goo.gl/maps/rdD4bNhVfY72
A pro would have stolen the kit, would hide it in the area, and would
have a ready-made alibi if stopped at a road-block. An amateur would be
loath to lose the drone and equipment, and wouldn't have taken steps to
prevent tracking of its ownership, so they'd be more readily caught.
After this, I reckon there may be a small market in selling pre-packaged
detection and location solutions to a lot of airports around the world;
so get cracking (:-)}
Roger, get back to work.
--
Roger Clarke mailto:[email protected]
T: +61 2 6288 6916 http://www.xamax.com.au http://www.rogerclarke.com
Xamax Consultancy Pty Ltd 78 Sidaway St, Chapman ACT 2611 AUSTRALIA
Visiting Professor in the Faculty of Law University of N.S.W.
Visiting Professor in Computer Science Australian National University
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