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crcombine noao.imred.crutil


NAME · USAGE_ · PARAMETERS · DESCRIPTION · EXAMPLES · SEE_ALSO

NAME

crcombine -- combine multiple exposures to eliminate cosmic rays

USAGE

crcombine input output

PARAMETERS

See parameters for imcombine .

DESCRIPTION

This task is a version of imcombine . See the help for that task for a description of the parameters and algorithms.

For the purpose of removing cosmic rays the most useful options are the "crreject" algorithm and/or combining with a median. Many other options may work as well. The best use of this task depends on the number of images available. If there are more than a few images the images should be combined with an "average" and using a rejection algorithm.

EXAMPLES

1. To combine two images using the gain and read noise parameters in the image header:

    cl> crcombine obj012,obj013 abc gain=gain rdnoise=rdnoise 

SEE ALSO

imcombine


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