clutter

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clutter

Electronics unwanted echoes that confuse the observation of signals on a radar screen
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

clutter

[′kləd·ər]
(electromagnetism)
Unwanted echoes on a radar screen, such as those caused by the ground, sea, rain, stationary objects, chaff, enemy jamming transmissions, and grass. Also known as background return; radar clutter.
(mathematics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

clutter

clutter
Plan position indicator.
In radar operations, the reception and visual display of radar echoes caused by precipitation, chaff, terrain, numerous aircraft, or other phenomena. Such echoes may limit or preclude ATC (air traffic control) from providing services based on radar.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

Clutter

A secondary inbox in Microsoft Outlook where less relevant mail is placed. After analyzing the content, the message is placed into the Clutter box if it is deemed non-essential to the user. Mail going into Clutter is not considered spam, which would otherwise be filtered into the Junk mailbox. Clutter functions similarly to the multiple inboxes in Gmail (see Gmail tabs). See spam filter.
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References in periodicals archive ?
where H is the number of the range cells of the target, [s.sub.m] and [d.sub.m] are the target returns in the sum and difference channels, respectively, when the clutter and noise are absent, [c.sub.sm] and [c.sub.dm] are the clutter components in the sum and difference channels, respectively, and [n.sub.sm] and [n.sub.dm] are the noise components in the sum and difference channels, respectively.
A variety of theoretical distribution functions (Rayleigh, Weibull, K, Pareto, etc.) were proposed to model the pdf of the amplitude of non-Gaussian sea clutter [14-16].
Output: The final sensing matrix [THETA]'([xi]') and the spectrum estimation [alpha]' with clutters and targets.
In some actual applications such as airborne systems, however, echoes form land clutter consisting of stable objects like mountains and buildings [10] can violate the assumptions for CS severely [11], which needs to be investigated.
Aimed at the problem of detecting maneuvering targets with high speed in sea clutter and based on the established motion state model, the JRC system with Kalman filter accurately detects the target with GLRT theory and sets the detection threshold.
Section 3 describes target detection based on GLRT in Gaussian clutter. Section 4 illustrates target detection based on GLRT in Weibull and K distribution clutter via Kalman filtering.
The RFC technique identifies the best atmospheric refractivity profile by matching measured radar clutter power patterns with those predicted by forward propagation models.
In this paper, we introduce a new EDH retrieval method, which takes advantage of radar sea clutter received at various heights.
Thanks to mission clutter, the dire prediction of a "rising tide of mediocrity" has become a reality for all too many teachers and students.
The concept of mission clutter is well-known in business and the military.