초록 ▼

The present invention determines the geolocation of an emitter, using at least one observer measuring signal change while moving on at least two observation tracks. The measurement of emitter signal change is begun between a first observer position and a second observer position. The second observer

The present invention determines the geolocation of an emitter, using at least one observer measuring signal change while moving on at least two observation tracks. The measurement of emitter signal change is begun between a first observer position and a second observer position. The second observer position is predicted at the time the last measurement from which signal change will be derived is made. The method utilizes knowledge of the measurement start and end points to determine a second pair of observer signal-change measurement start and end positions such that the emitter line-of-position (LOP) determined by the second signal change measurement will intersect the LOP associated with the first signal change measurement at possibly multiple points, but at each of these point intercept orthogonally to within the signal change measurement errors. The method determines the intersection points of the LOPs and assigns a likelihood to each intersection point for measuring the probability for each of the multiple intersection points that it is the emitter location, determines a correct emitter position from these likelihood weights, and generates an error associated with the emitter position estimate.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for determining the geolocation of an emitter, using at least one observer measuring signal change while moving on at least two observation tracks, the method comprising the steps of:beginning the measurement of emitter signal change between a first observer po

[ What is claimed is:] [1.]1. A method for determining the geolocation of an emitter, using at least one observer measuring signal change while moving on at least two observation tracks, the method comprising the steps of:beginning the measurement of emitter signal change between a first observer position and a second observer position;predicting the second observer position at a time the last measurement from which signal change will be derived is made;utilizing knowledge of the measurement start and end points to determine a second pair of observer signal-change measurement start and end positions such that the emitter line-of-position (LOP) determined by the second signal change measurement will intersect the LOP associated with the first signal change measurement at possibly multiple points, but at each of these points intercept orthogonally to within the signal change measurement errors;determining the intersection points of the LOPs;assigning a likelihood to each intersection point for measuring the probability for each of the multiple intersection points that it is the emitter location;determining a correct emitter position from these likelihood weights; andgenerating an error associated with the emitter position estimate.