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The speed of profiling can be determined with a variety of different methods.
It must be determined because it is required for the conversion of the shear-probe samples into physical units and for transforming frequency spectra into wavenumber spectra.
Methods for determining the speed of profiling include, but are not limited to:
# 	Using the rate-of-change of pressure for a vertical profiler.
# 	Using the rate-of-change of pressure, the pitch angle, and the angle of attack for a glider.
# 	Using a flight model for a glider.
# 	Using an onboard current meter.
# 	Using a constant speed.
# 	Using the speed recorded by an independent instrument after its record has been carefully aligned in time with the shear-probe data.