A system for data communication between ground stations using an orbiting satellite as a relay includes a technique for avoiding the loss of signals from the satellite during periods of heavy precipitation. Data is communicated from an orbiting satellite to a plurality of earth stations on a single transmission...http://www.google.com.au/patents/US4837786?utm_source=gb-gplus-sharePatent US4837786 - Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
