Coherent echo

From Glossary of Meteorology
(Redirected from Coherent echoes)



coherent echo

A radar echo with phase and amplitude either showing little change over successive radar pulses or changing in a regular and predictable way. Such an echo may arise from fixed or slowly moving point targets or from distributed targets in which the individual scattering elements do not move (or move slowly) with respect to one another.

By contrast, an incoherent echo is an echo with random phase and amplitude from pulse to pulse. Such echoes arise from distributed targets such as precipitation targets, in which the individual scatterers move with respect to one another.


Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.