Determining a geolocation solution of an emitter on earth using satellite signals
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United States of America Patent
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Feb 23, 2010
Grant Date -
Oct 16, 2008
app pub date -
Apr 13, 2007
filing date -
Apr 13, 2007
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Abstract
Embodiments provide systems and methods for determining the geolocation of an emitter on earth. A solution is obtained from two TDOA measurements that need not be acquired at the same time. A solution is obtained from a TDOA measurement and an FDOA measurement that need not be acquired at the same time and need not be coming from the same satellite pair. A location of an emitter can be determined from minimizing a cost function of the weighted combination of the six solutions derived from the two TDOA measurements and the two FDOA measurements, where the weight of each solution in the combination is determined based on the intersection angle of the two curves that define the possible locations of the emitter based on the TDOA and/or FDOA measurements.
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