DETERMINING A GEOLOCATION SOLUTION OF AN EMITTER ON EARTH BASED ON WEIGHTED LEAST-SQUARES ESTIMATION

摘要

Embodiments provide systems and methods for determining the geolocation o f an emitter on earth based on weighted least-squares estimation based on tw o TDOA and two FDOA measurements, none of which need to be acquired at the s ame time. The four TDOA and FDOA measurements and the errors in each of the measurements are determined. Weights for the errors in the TDOA and FDOA mea surements are determined, and the weights are applied in a weighted errors f unction. The weights account for the errors in the measurements and the erro rs in the satellite positions and velocities, and are dependent on the local ization geometry. The weighted errors function is minimized to determine the location estimate of the unknown emitter.