1D Flatness CAX

This is the average between the maximum and minimum profile values taken over the in field area normalised to CAX:

\[\cfrac {100} {cax} \cdot \cfrac {max - min} {2}\]

Where max and min are the profile maximum and minimum respectively and cax is the profile centre value.

Protocol invocation name: 1D Flatness CAX

The max, min and cax may be affected by normalisation or windowing.