plane-earth attenuation

plane-earth attenuation

[′plān ‚ərth ə‚ten·yə′wā·shən]
(electromagnetism)
Attenuation of an electromagnetic wave over an imperfectly conducting plane earth in excess of that over a perfectly conducting plane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.