View source for Detrending time series

{{DefineConcept
|description=Detrending typically refers to removing the low-frequency content of the time series
|article_type=Concept
|instrument_type=Velocity point-measurements, Velocity profilers
}}
In the context of analysing turbulence observations, the resulting detrended signal should contain mostly contributions from turbulence and surface waves (if present). However, frame interference (wakes), vibrations and measurement noise may also contaminate the detrended signal.


[[File:Long timeseries.png|500px|thumb|Measured velocities at 4 Hz from an [[Acoustic-Doppler Velocimeters]] have been detrended using three different techniques]]