|| Starpath online classroom || Marine Weather Glossary || Glossary Index || Home ||

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Doppler effect A shift in frequency of a wave due to the relative movement of the source or the observer. This principle plays a key role in modern marine instrumentation in several areas, including Transit Sat-Nav for position finding, in GPS and sonar for speed determinations, and in NEXRAD weather radar to measure wind speeds.

[close window]