Passive three dimensional track of non-cooperative targetsthrough opportunistic use of global positioning system (GPS) andGLONASS signals

[David Honig]

At 03:08 PM 11/24/01 +0800, F. Marc de Piolenc wrote:
>Damn. If this really works it is a cheap countermeasure to
>low-observable ("stealth") technology. In effect, everybody within the
>GPS and/or GLONASS coverage area has his own multistatic radar available
>7/24.
>
>I wonder if this has actually been implemented...
>

I think this patent is a formalization of an effect reported
maybe a year ago... where stealth aircraft were localized via
cell base station data... in England IIRC