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

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... Marc de Piolenc mean-green@hushmail.com wrote:

US Pat. 6,232,922

Passive three dimensional track of non-cooperative targets through opportunistic use of global positioning system (GPS) and GLONASS signals

Abstract A method and apparatus for utilization of GPS, GLONASS or other existing RF signals is disclosed. These existing RF signals are scattered by targets, with a receiver of these scattered signals providing processing to extract three dimensional track of these objects.