tropospheric superrefraction

tropospheric superrefraction

[¦trōp·ə¦sfir·ik ¦sü·pər·ri′frak·shən]
(geophysics)
Phenomenon occurring in the troposphere whereby radio waves are bent sufficiently to be returned to the earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.