TRANSMIT RECEIVE MODULE FOR SPACE GROUND LINK SUBSYSTEM (SGLS) AND SATELLITE TELEMETRY, TRACKING AND COMMANDING (TT&C), AND COMMUNICATIONS UNIFIED S-BAND (USB)

To support the operation of a large number of satelIites at various orbits, a network of antennas distributed around the globe is needed to contact satellites at predetermined time and location. These satellites require eflcient, Telemetry, Tracking and Commanding (TT&Cj for payload operation. Currently large mechanically steered parabolic antennas provide Transmit and Receive (TR) capabilities in support of satellite operations (SATUP$). Reflector antennas have been used because of relatively low acquisition cost. S-Band component technology provided by the cell phone industry will now allow an affordable Electronically Scanned Antenna (ESA).