Chapter 2 Satellites and Antennas

CHAPTER 2 SATELLITES AND ANTENNAS LEARNING OBJECTIVES Upon completing this chapter, you should be able to do the following: Identify the theory relating to satellites. Calculate azimuth and elevation, using plotting guides. Identify the types, basic system and fleet broadcast subsystem equipment of communication satellites. Identify the characteristics of antennas and antenna selections. Identify the types of antennas. Explain how the distribution systems interface with antenna assignment and selections. Identify the procedures for setting up antenna couplers, multicouplers, transmitters, and transceivers. Explain how the patch panel is used in conjunction with the equipment. Identify the procedures for raising and lowering antennas. Determine the optimum reception of a directional antenna by rotation, alignment, and tuning. Identify safety precautions that should be observed when working on antennas. Satellite communication (SATCOM) systems SATCOMM ANTENNAS satisfy many military communications requirements The antennas shown in figures 2-1 and 2-2 are used with reliable, high-capacity, secure, and cost-effective telecommunications. Satellites provide a solution to the problem of communicating with highly mobile forces deployed worldwide. Satellites also provide an alternative to large, fixed ground installations. They provide almost instantaneous military communications throughout the world at all but the highest latitudes (above 700). for satellite communications. The OE-82C/WSC-1(V) antenna (figure 2-1) is used with the AN/WSC-3 transceiver and designed primarily for shipboard installation. Depending upon requirements, one or two antennas may be installed to provide a view of the satellites at all times. The antenna is attached to a pedestal. This permits the antenna to rotate so that it is always in view of the satellite. The frequency band for receiving is 248 to 272 MHz; the band for transmitting is 292 to 312 MHz. 2-1