Patent ID: 7830308

Claim:
A system for determining the position of an aircraft, comprising: a multilateration system controller; a plurality of receiving stations for receiving an identifying signal from an object that is to be located within a zone of coverage of said multilateration system, said receiving stations being coupled in communication with said controller and sending to said controller time of arrival data for said identifying signal; wherein; said multilateration system controller has an input for receiving information from a second controller which is part of an adjacent multilateration system; when said object is in proximity to a boundary between said zone of coverage of said multilateration system and a zone of coverage of said adjacent multilateration system, said first controller uses said time of arrival information received from said receiving stations, together with said information received from said second controller, to determine the position of said object; and said information received from said second controller is time difference of arrival data determined based on information received by said second controller concerning arrival of said identifying signal at respective receiving stations of said adjacent multilateration system.