Apparatus for multilateration and method

摘要

To cater for the positioning of an aircraft in a boundary zone between two adjacent multilateration systems, the controller ( 14 ) in one system receives Time Difference of Arrival data provided by the controller ( 15 ) in the second system. The controller ( 15 ) derives the TDoA data from time of arrival data provided by its receiver stations ( 9 - 13 ). By furnishing TDoA data the timings of the two systems do not need to be synchronised. The controller ( 14 ) uses the TDoA data and also time of arrival data from its local receiver stations ( 4 - 8 ) to perform a multilateration to determine the location of the aircraft ( 16 ).