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diff --git a/noao/onedspec/scombine/icombine.com b/noao/onedspec/scombine/icombine.com
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+# SCOMBINE Common
+
+int	combine			# Combine algorithm
+int	reject			# Rejection algorithm
+real	blank			# Blank value
+pointer	rdnoise			# CCD read noise
+pointer	gain			# CCD gain
+pointer	snoise			# CCD sensitivity noise
+real	lthresh			# Low threshold
+real	hthresh			# High threshold
+int	nkeep			# Minimum to keep
+real	lsigma			# Low sigma cutoff
+real	hsigma			# High sigma cutoff
+real	pclip			# Number or fraction of pixels from median
+real	flow			# Fraction of low pixels to reject
+real	fhigh			# Fraction of high pixels to reject
+int	grow			# Grow radius
+bool	mclip			# Use median in sigma clipping?
+real	sigscale		# Sigma scaling tolerance
+int	logfd			# Log file descriptor
+
+# These flags allow special conditions to be optimized.
+
+int	dflag			# Data flag (D_ALL, D_NONE, D_MIX)
+bool	doscale			# Do the images have to be scaled?
+bool	doscale1		# Do the sigma calculations have to be scaled?
+bool	dothresh		# Check pixels outside specified thresholds?
+bool	dowts			# Does the final average have to be weighted?
+bool	keepids			# Keep track of the image indices?
+bool	docombine		# Call the combine procedure?
+bool	sort			# Sort data?
+
+common	/scbcom/ combine, reject, blank, rdnoise, gain, snoise, lsigma, hsigma,
+		 lthresh, hthresh, nkeep, pclip, flow, fhigh, grow, logfd,
+		 dflag, sigscale, mclip, doscale, doscale1,
+		 dothresh, dowts, keepids, docombine, sort