iraf.net

NUMBER:	148
MODULE:	ecdispcor, msdispcor
SYSTEM:	V2.9
DATE:	Mon Apr 22 13:23:09 MST 1991
FROM:	valdes

BUG:	The combining options 'sum', 'average', 'minmax' do not work correctly.
	The cause is failing to clear an array between each spectrum so
	that as subsequent spectra are added the preceding spectra are
	multiply added.

STATUS:	The workaround is to dispcor each order to the same dispersion
	with onedspec output format and then add or average the spectra
	with imcombine.  The problem is fixed for V2.10.