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radar
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Learn how a radar works
principle of radar operation pulse waveform transmitted by radar parts of a radar system radar antennas ASR-9 airport surveillance radar AN/APG-66 radar in an F-16 fighter aircraft refraction of HF radar radiation by the ionosphere hook echo Waveguide
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Air traffic controllers aboard the USS Essex monitoring radar screens, 2003.
radar summary
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Written by
Merrill I. Skolnik
Superintendent, Radar Division, Naval Research Laboratory, Office of Naval Research, U.S. Department of the Navy, Washington, D.C. Author of Introduction to Radar Systems; editor of Radar Handbook.
Merrill I. Skolnik
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radar, electromagnetic sensor used for detecting, locating, tracking, and recognizing objects of various kinds at considerable distances. It operates by transmitting electromagnetic energy toward objects, commonly referred to as targets, and observing the echoes returned from them. The targets may be aircraft, ships, spacecraft, automotive vehicles, and astronomical bodies, or even birds, insects, and rain. Besides determining the presence, location, and velocity of such objects, radar can sometimes obtain their size and shape as well. What distinguishes radar from optical and infrared sensing devices is its ability to detect faraway objects under adverse weather conditions and to determine their range, ...(100 of 11706 words)

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