1-30
Q31. What transmission method uses a stable cw reference oscillator, which is locked in phase with the
transmitter frequency?
RADAR CLASSIFICATION AND USE
Radar 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-range
surveillance and early-warning systems. A radar system is the heart of a missile guidance system. Small
portable radar systems that can be maintained and operated by one person are available as well as systems
that occupy several large rooms.
MILITARY CLASSIFICATION OF RADAR SYSTEMS
The 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 makes
extensive use of radar systems for commercial aircraft in-flight and landing control, but does not use the
military classification system.
Radar systems are usually classified according to specific function and installation vehicle. Some
common examples are listed below:
FUNCTION
INSTALLATION VEHICLE
Search
Ground or land based
Track
Airborne
Height-finder
Shipboard
The joint-service standardized classification system further divides these broad categories for more
precise identification. Table 1-1 is a listing of equipment identification indicators. Use of the table to
identify a particular radar system is illustrated in figure 1-23. Note that for simplicity, only a portion of
the table has been used in the illustration.
