SATELLITE SYSTEMS IN THE NATURE OF COMMUNICATION SYSTEMS BASED ON (SCPC, MCPC AND VSAT) DIGITAL DATA BROADCAST SYSTEMS OF AUDIO AND DATA PROGRAM MATERIAL IN THE NATURE OF FLEXIBLE BANDWIDTH SHARING WITH ANY MIX OF DATA, FAX, VOICE AND VIDEO TRAFFIC. SATELLITE NAVIGATIONAL SYSTEM, NAMELY, A GLOBAL POSITIONING SYSTEM (GPS). NAVIGATIONAL SYSTEM COMPRISING SIGNAL RECEIVER, ENCODERS, DECODERS, MODULATORS. CABLE TELEVISION HEAD-END EQUIPMENT IN THE NATURE OF TRANSMITTERS SIGNAL RECEIVER, ENCODERS, ...