Patent ID: 7205930

Claim:
A multistatic radar comprising: a radar transmitter at a transmitter location having a transmitter altitude, said radar transmitter illuminating a target at a target location having a target altitude with a radar signal, said target reflecting said radar signal to a first radar receiver at a first receiver location at a first altitude, a second radar receiver at a second receiver location at a second altitude, and a third radar receiver at a third receiver location at a third altitude, said first radar receiver performing a first bistatic range measurement to said target, said second radar receiver performing a second bistatic range measurement to said target, said third radar receiver performing a third bistatic range measurement to said target, means for combining said first bistatic range measurement with said second bistatic range measurement and said third bistatic range measurement to obtain a correct three dimensional target position with respect to said radar transmitter and an incorrect three dimensional target position with respect to said radar transmitter, means for identifying said incorrect three dimensional target position by comparing said incorrect three dimensional target position to said transmitter location, said first receiver location, said second receiver location, and said third receiver location, wherein said first bistatic range measurement is combined with said second bistatic range measurement and said third bistatic range measurement in a quadratic equation solved for said correct three dimensional target position and said incorrect three dimensional target position, and wherein said incorrect three dimensional target position is identified by comparing said target altitude with said transmitter altitude.