Satellite communication antenna direction system

Claim 1

A PROGRAM TRACK SYSTEM FOR DEVELOPING RELATIVELY CONTINUOUS ANTENNA POINTING SIGNALS, WHICH COMPRISES, IN COMBINATION: MEANS FOR RECEIVING FROM A DISTANT COMPUTATION CENTER DIGITAL DATA WHICH DEFINES THE EXPECTED POSITIONS AND VELOCITIES AT DISCRETE SELECTED TIMES ONLY OF EACH OF A NUMBER OF ORBITING SATELLITES; MEANS FOR STORING SAID DIGITAL DATA; MEANS FOR CONTINUOUSLY READING OUT SAID DIGITAL DATA TO PRODUCE SEQUENCES OF DIGITAL PULSE SIGNALS; LINEAR INTERPOLATION MEANS RESPONSIVE TO SAID DIGITAL DATA FOR DEVELOPING POSITION AND VELOCITY SPECIFICATIONS FOR EACH OF SAID SATELLITES AT OTHER SPECIFIED TIMES WHICH COMPRISES, SIGNAL PROCESSING MEANS INCLUDING, MEANS FOR STORING DIGITAL PULSE SIGNALS, MEANS FOR SELECTIVELY CONVERTING SAID DIGITAL SIGNALS TO ANALOG SIGNALS, MEANS FOR INCREMENTALLY ALTERING THE MAGNITUDE OF SAID ANALOG SIGNALS LINEARLY IN ACCORDANCE WITH A SCHEDULED DEPENDENT ON SAID VELOCITY SPECIFICATIONS, MEANS FOR CONVERTING INCREMENTALLY ALTERED SIGNALS INTO DIGITAL SIGNALS, MEANS FOR CONTINUOUSLY ALTERING SAID SEQUENCES OF PULSE SIGNALS REPRESENTATIVE OF SAID RECEIVED POSITION SPECIFICATIONS IN ACCORDANCE WITH SAID ALTERED DIGITAL SIGNALS TO PRODUCE INTERPOLATED DIGITAL SIGNALS, MEANS FOR DEVELOPING DIGITAL SIGNALS WHICH DEFINE THE MOMENTARY POSITION OF A TRACKING ANTENNA, MEANS FOR CONVERTING SAID ANTENNA POSITION SIGNALS INTO ANALOG SIGNALS, MEANS FOR CONVERTING SAID INTERPOLATED DIGITAL SIGNALS INTO ANALOG SIGNALS, MEANS FOR ALGEBRAICALLY COMBINING SAID ANALOG ANTENNA POSITION SIGNALS AND SAID ANALOG INTER-