surface duct


Also found in: Acronyms.

surface duct

[′sər·fəs ‚dəkt]
(geophysics)
Atmospheric duct for which the lower boundary is the surface of the earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Of most interest to CASPER is a special type of surface duct: the evaporation duct (ED), which is almost always present over the oceans (Babin et al.
CASPER: Coupled Air-Sea Processes and Electromagnetic Ducting Research
To demonstrate the behavior of radiowave in surface duct, propagation loss is calculated with 5.8 GHz frequency.
A novel Wavelet-Galerkin method for modeling radio wave propagation in tropospheric ducts
Precautionary measures such as holding off from sonar exercises when surface ducts are likely to form may keep the creatures from becoming startled and disoriented.
Stranded: a whale of a mystery: scientists generally agree that sonar can trigger strandings of certain whales, but no one really knows what leads these deep divers to the beach
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