Patent ID: 6933888
Filing Date: 2005-08-23
Classification: G01S

Abstract:
1. A method for improving the accuracy of a coherent time-of-arrival geolocation system in ascertaining the location of a pulse train emitter, comprising the steps of: providing multiple spaced-apart collectors at known locations so as to establish a long measurement baseline; at each collector, measuring times of arrival of pulses emitted by the pulse train emitter using non-snippet based coherent time-of-arrival processing over tens of seconds to correlate received pulses at different collectors with associated emitted pulses such that only one received pulse need be correlated with the corresponding emitted pulse to obtain geolocation information based on time of arrival of other pulses at other collectors, thereby to remove any requirement of simultaneous collection of the same pulse at multiple collection platforms; and, from an ensemble of measured times of arrival deriving the location of the emitter.