subrefraction

subrefraction

[¦səb·ri′frak·shən]
(electromagnetism)
Atmospheric refraction which is less than standard refraction.

subrefraction

A condition in which there is less than normal bending of a radar beam. This may be as a result of an abnormal vertical gradient of temperature and/or water vapor.
References in periodicals archive ?
Subrefraction causes shorter ranges for radars operating within such a layer; super-refraction would extend the range of radars, but targets would appear closer and at higher altitudes than actual.
The radio refractive environment can be classified into standard, subrefraction, superrefraction, and ducting environments.