Method of Receiver and Satellite Synchronisation

摘要

A method is provided of synchronising a receiver with a signal transmitted by a remote transmitter on-board a satellite. The signal comprises the repeated transmission of time data defining the transmission time and orbit data relating to the orbit of the satellite. The method comprises receiving the transmitted signal at the receiver; obtaining reference data at least a part of which corresponds to the data within the transmitted signal; and estimating a receipt time relating to the transmitted signal. A predicted signal is selected based upon the reference data and the estimated receipt time, this being compared with the received signal. The time synchronisation of the received signal is then determined based upon the comparison and the time data.