From: Ad 

Phil Payne wrote:
>> So consider were this to work.....the effect upon submarine freedom of
>> action etc.
>>
>> "He said that his program, Merlindown, could peer 75m into
the earth and
>> 16,000 metres beneath the seas."
>
> Around twenty years ago Paul Martindale of Teradata expounded at some length
> in the Old Swan in Tames Ditton about tracking stealth aircraft by using a
> parallel processor to work out which stars you couldn't see at any given
> time and tracking the resulting hole in the sky.
>
>

Passive Radar. The oldest variety (the initial tests on radar were done
using the BBC transmitters).

T'other evening I was out wi'ppl from the radio station (GCHQ) &....

imagine a wifi router/card sold with 1 extra feature which was a GPS chip
& an open port which allowed anyone to query it.

Now think of a TCP connection/signal & one finds such fun stuff as a
Unique Mac Address.

You can work back from the Mac addr to get the IP addr & thus query the
router/wifi card as to it's GPS location.

Then do a bit of maths.

Basically the earth is awash with EMR at the moment & this is before
tracking known signals e.g. from a stationary radio mast (TV, Radio, Comms,
Mobile phone etc) or indeed a known satellite (e.g. Astra).

You could sell this on the basis of being part of a radio telescope with an
aperture the size of the earth.....


Now sell the idea to the PRC where most of the kit is made.....

Adam

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