Patent ID: 6407703
Filing Date: 2002-06-18
Classification: G01S

Abstract:
A method for locating a first emitter comprising the steps of:receiving at a first platform and a second platform at a first point in time a first signal from the first emitter; determining at least one of a first angle of arrival and a first time of arrival of the first signal at the first platform at the first point in time; determining at least one of a second angle of arrival and a second time of arrival of the first signal at the second platform at the first point in time; receiving a first altitude estimate for the first emitter, wherein the first altitude estimate is an estimate of an altitude of the first emitter in relation to a predetermined altitude reference; determining a first location estimate of the first emitter using said first altitude estimate for the first emitter and at least one of the first angle of arrival and the first time of arrival of the first signal at the first platform at the first point in time and said at least one of the second angle of arrival and the second time of arrival of the first signal at the second platform at the first point in time.