1-30Q31.What transmission method uses a stable cw reference oscillator, which is locked in phase with thetransmitter frequency?RADAR CLASSIFICATION AND USERadar systems, like cars, come in a variety of sizes and have different performance specifications.Some radar systems are used for air-traffic control at airports and others are used for long-rangesurveillance and early-warning systems. A radar system is the heart of a missile guidance system. Smallportable radar systems that can be maintained and operated by one person are available as well as systemsthat occupy several large rooms.MILITARY CLASSIFICATION OF RADAR SYSTEMSThe large number of radar systems used by the military has forced the development of a joint-services classification system for accurate identification. The Federal Aviation Agency (FAA) also makesextensive use of radar systems for commercial aircraft in-flight and landing control, but does not use themilitary classification system.Radar systems are usually classified according to specific function and installation vehicle. Somecommon examples are listed below:FUNCTIONINSTALLATION VEHICLESearchGround or land basedTrackAirborneHeight-finderShipboardThe joint-service standardized classification system further divides these broad categories for moreprecise identification. Table 1-1 is a listing of equipment identification indicators. Use of the table toidentify a particular radar system is illustrated in figure 1-23. Note that for simplicity, only a portion ofthe table has been used in the illustration.
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