NAME
focanl - to analyze focus images
SYNOPSIS
focanl fits_files ...
DESCRIPTION
focanl inspects the FITS files in the argument and
determines the best focus.
The fits_files should be generated by the
focusdip command.
Here is a montage of twenty typical images:
focanl determines the best focus by
first creating a table of focus_position and second moments.
It does this by inspecting each image and doing the following:
- reading the header for the TELFOCUS
- determining the sky for each image
- determining the second moment after removing sky using
XVista centroid command
Once the table is created it fits a parabola
and determines the minimum focal position.
Program index