main-beam clutter

main-beam clutter

main-beam clutterclick for a larger image
A view of radar scope.
In radar, it is the one caused by the main beam intersecting the ground and appearing as clutter on the radarscope.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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In some situations, the ratio of main-beam clutter to target signal might be as high as 80 dB.