over-the-horizon radar
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over-the-horizon radar
[′ō·vərthə hə′rīz·ən ′rā‚där] (electromagnetism)
Long-range radar in which the transmitted and reflected beams are bounced off the ionosphere layers to achieve ranges far beyond line of sight.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
over-the-horizon radar

Principle of over-the-horizon radar.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved