| 摘要 |
A self-contained initialisation system for directional space links between a satellite (20) and one or more directional antennae (28) of a ground station (27) is described, which includes, on board the satellite (20), a receiver (21) with a navigational unit comprising a self-contained initialisation device that provides orbital parameters for the satellite, and a series data formatter that modulates a signal (24) transmitted by a hemispherical coverage antenna (23) towards the earth; a non-directional antenna (25), communicating with a non directional ground station (26) for periodically receiving the orbital data contained within said signal (24) at each passage of the satellite on a trajectory visible from said station; a computing unit (29) connected to the ground station (26) for calculating pointing parameters for each directional antenna (28) which are transmitted to the ground station (27) communicating with said directional antenna.
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