METHOD TO DETERMINE THE POSITION IN TIME OF A SYNCHRONIZATION SIGNAL AND TRANSMISSION SYSTEM CARRYING OUT SUCH A METHOD

摘要

One aspect of the invention concerns a method to determine the position in time of a synchronization signal triggering within a spacecraft payload comprised in a spacecraft a switching between a first beam switching time plan and a second beam switching time plan implemented on ground by a transmission system. Another aspect of the invention concerns a transmission system comprising a ground gateway comprising means to send a signal to the spacecraft payload, said signal comprising a continuous sequence of super frames, each super frame being associated to a number SFN_i, a reference receiver comprising means to receive the signal from said spacecraft payload in a reference coverage area, a communication channel allowing the ground gateway to transmit to the spacecraft any request of changing from one beam switching time plan to another, said transmission system comprising means for carrying out the method according to the invention.