Patent ID: 9377524
Filing Date: 2016-06-28
CPC Classification: G01S

Claim Text:
1. A method for determining a location of an emitter, comprising: acquiring, in a Wide Area Multilateration (WAM) system that includes a central processing station and a plurality of reporting stations, a time-stamp value from at least an N number of reporting stations each reporting station being configured to receive an emitted signal from an emitter and to transmit a time-stamp signal containing a time stamp value, each reporting station being associated with a respective clock, and the clocks of said reporting stations being in an unsynchronized state; calculating, with a processor, a plurality of position values each position value being indicative of a possible position of said emitter based on said time-stamp values of at least N−1 of said reporting stations, each position value being calculated based on time-stamp values from a unique group of N−1 of said plurality of reporting stations; calculating, with a processor, clock deviations of said station clocks based at least on the plurality of position values; correcting, with a processor, said time-stamped values based on the calculated clock deviations; and determining, with a processor, a location of said emitter based on said corrected time-stamp values.