Direction of the vertical velocity
From Atomix
The direction of the vertical velocity of the profiler is important. Most vertical profilers collect data while they are descending, and the data collected while ascending is useless be4cause the probes are in the wake of the instrument and there is no oncoming flow over the shear proves. However, some profilers are designed to collect data while they are ascending and the data collected during it descent is not useable. Gliders can produce meaningful data while descending and ascending. So, it is important to know what type of instrument was used to collect your shear-probe data.
return to Flow chart for shear probes