SATELLITE ANTENNA AUTOTRACK SYSTEM PERMITTING ERROR SIGNALS TO APPEAR AT THE EARTH STATION

摘要

The invention pertains to satellite antenna autotrack systems which permit error signals to appear at the ground station rather than at the satellite's antenna. A conventional four horn cluster is used to produce pairs of circularly polarized position signals which are detected and processed at the ground station to produce vertical and horizontal error signals. The four horn cluster is simultaneously used to transmit the satellite's down link communications signals. The error signals are transmitted from the ground station to the satellite to reposition the satellite's vertical and horizontal axis to correspond to the line of sight to the ground station.