Decomposing velocity measurements
From Atomix
Overview
This step involves separating the raw velocities into:
- low-frequency component comprising of the background large-scale flow
- high-frequency component comprising of the turbulence and surface wave signals. This component may also include unwanted contributions from the measurement platforms, such as wakes and vibrations associated with the frame.
This decomposition enables determining mean flow past the sensor and surface wave statistics, which are necessary for later choosing the appropriate inertial subrange model for spectral fitting.
