Introduction: The evaluation method detects periodic dominant characteristics; parameters are derived from this new waviness profile (WD profile).
WDSm:
The mean horizontal size of the profile elements (mean
period length of the dominant waviness) determined from the
amplitude spectrum.
WDc: Mean value from the peaks of the profile elements within the evaluation length.
WDt:
Vertical difference between the highest and the lowest
point of the WD profile within the evaluation length.