***THIS PICTURE MAY NOT BE USED TO STATE OR IMPLY ESA ENDORSEMENT OF ANY COMPANY OR PRODUCT *** *** THIS PICTURE MAY NOT BE USED TO STATE OR IMPLY ESA ENDORSEMENT OF ANY COMPANY OR PRODUCT *** Artemis satellite. Illustration of the Artemis communications satellite receiving data from an Earth observation satellite and relaying it to Europe. Artemis receives the data over a laser link (red) and relays it by microwave transmission. The Semiconductor Laser Intersatellite Link Experiment (SILEX) on Artemis uses a near- infrared laser to exchange data between satellites in orbit. Each terminal consists of a 25-cm telescope with a silicon avalanche photodiode for reception. Artemis is due for launch in 1997.

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