Sxp (Peak Extreme Height)
Sxp (peak extreme height) is the difference of heights at the areal material ratio values p% and q%. The areal material ratio curve is used for the calculation of Sxp.
Sxp represents the difference in the height between the average plane and peaks on the surface after especially high peaks on the surface are removed. By default, it is the height difference between the areal material ratio values 2.5% and 50%.