Satellite communication optical beam acquisition techniques using a plurality of scan patterns

摘要

A communication system employing an optical beam 17 suitable for transmission of data between a first terminal 12 and a second terminal 22. The apparatus transmits beam 17 from terminal 12 with two different scan patterns, a rosette pattern 625 or 650 for the central part of the scan, and a spiral pattern 600 for the remainder of the scan.