SATELLITE EQUIPMENT

Figure 3-19.—UHF Follow-On satellite exploded view. communications capability to the National Command Authority (NCA). Second, it will provide sufficient communications support for both strategic and tactical missions. The primary objective of the MILSTAR program is to develop and deploy an affordable, jam- resistant SATCOM system that will meet both long- haul and local communications needs. MILSTAR will use communications terminals that will provide Secure Voice (SV), Teletype (TTY), data, and facsimile EHF SATCOM. MILSTAR terminals will be installed on aircraft, in fixed telecommunications centers, landbased tactical elements, shorebased telecommunications centers, surface ships, and submarines. In the following paragraphs, we will look at some of the equipment associated with satellite com- munications. SATELLITE EQUIPMENT The equipment used in Navy SATCOM sub- systems can be divided into two general groups, rf terminals and the baseband equipment common to a processor installation. The selection of specific equipment is determined by the operating en- vironment—whether installation is to be aboard a ship, submarine, aircraft, or shore installation. In this chapter, we will limit our discussion primarily to commonly used shipboard and shore equipment. Satellite Communications Terminal AN/FSC-79 The AN/FSC-79 terminal processes and converts 70-MHz signals to X-band (shf) transmitted signals. It also converts received signals from X-band to 70 MHz. This terminal can simultaneously transmit a spread spectrum carrier and receive a satellite beacon signal. The design of the terminal provides redundancy in many components to ensure a high degree of availability. The terminals are installed at NCTAMS LANT, MED, WESTPAC, EASTPAC, and NCTS, Stockton (contractor operated). Uhf Transceiver AN/WSC-5(V) The AN/WSC-5(V) transceiver provides an eight-circuit, full-duplex data operation or, as an alternative, six full-duplex data circuits and two FM audio or tone-group circuits. It also provides an interface for connectivity to the uhf DAMA 3-23