Ends of Dataset

To ensure that the smoothing function is applied uniformly over the whole data array, it is treated differently at the edges. For instance, at pixel one, half of the smoothing function will lie outside the array. The ends of the dataset are temporarily extended by half of the width of the smoothing window while being smoothed using one of the following user selectable techniques (controlled by the value of the ENDS parameter),

ENDAVERAGE

Extend each end with a local average over n pixels at the end of each strip.

REGIONAVERAGE

Extend each end with an average over two user specified pixel ranges.

ONESPECIFY

Extend each end with one value

TWOSPECIFY

Extend each end with a separate value

ENDVALUE

Extend each end with the first and last values in the strip.