Specifies the upper threshold used when automatically determining the location of 'sky' pixels in the object spatial profile.
The algorithm used is:
- Median filter profile and multiply by 1.05
- Calculate the threshold point:
Min + (Max-Min)*TUNE_SKYHILIM
- Take the minimum of the two quantities
This minimum is used as the maximum sky intensity allowed along the spatial profile.
The default value is 0.5 (i.e. 50%).
Martin Clayton