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ECH_SLOPE
Function
Estimate the slope of the orders across the frame.
Summary
Slope estimation is only performed when frame checking is enabled
(set TUNE_FCHECK=YES).
This routine determines the slope of the orders in an echellogram.
The method used is to first collapse or median filter samples of
20 columns lying across the corner-corner diagonals of the input
frame, into a 1-D array, and then applies a triangle filter to
this array.
Available Topics
Hints
Martin Clayton
mjc@star.ucl.ac.uk
Mon Dec 9 17:09:35 1996