An optical data transfer with low-Earth orbit EARTH AND RELATED COMMUNICATION SYSTEM

摘要

1. The optical system (10) for the communication of payload data (PD) from a low Earth orbit to the ground, comprising: - a satellite (20) in low earth orbit, comprising: - a subsystem (CS) communication satellite transceiver (STR), - a source (PDS) payload data, supplies the data payload (PD) in the subsystem (CS) connection, - an optical earth terminal (30) comprising: - ground transceiver (GTR); - a subsystem (PAT) pointing, acquisition and tracking , wherein the satellite (20) in low earth orbit coupled to the optical terrestrial those rminalom (30) via an optical channel (DL), aoptichesky earth terminal (30) associated with the satellite (20) in low Earth orbit through the channel (UC); wherein: - said channel (UC) is a detection and tracking channel with the ground beacon (GB), managed by said subsystem (PAT) pointing, acquisition and tracking, and Ground beacon (GB) has a wide beam (W) for the detection and the beam (G) pointing to accompaniment; - said satellite transceiver (STR) is configured adjustable to space consisting nstvennoe ground beacon direction (GB); - said Ground beacon (GB) for the channel (UC) is a pulse position modulation channel (FIM) .2. The optical system (10) connection according to claim 1, characterized in that the satellite (20) in low Earth orbit further comprises a buffer (B) (PD) for temporarily storing said payload data, while the line-of-sight between the satellite (20) to low earth orbit and terrestrial optical terminal (30) becomes available, which makes the payload data (PD) available for fast lane