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1 files changed, 42 insertions, 0 deletions

diff --git a/noao/digiphot/daophot/daolib/dpairmass.x b/noao/digiphot/daophot/daolib/dpairmass.x
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--- /dev/null
+++ b/noao/digiphot/daophot/daolib/dpairmass.x
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+include <imhdr.h>
+include "../lib/daophotdef.h"
+
+# DP_AIRMASS --  Set the image airmass.
+
+procedure dp_airmass (im, dao)
+
+pointer	im		# pointer to IRAF image
+pointer	dao		# pointer to the daophot structure
+
+pointer	sp, key
+real	xair
+real	imgetr(), dp_statr()
+
+begin
+	# Get the airmass keyword.
+	call smark (sp)
+	call salloc (key, SZ_FNAME, TY_CHAR)
+	call dp_stats (dao, AIRMASS, Memc[key], SZ_FNAME)
+
+	# Get the value.
+	if (Memc[key] == EOS)
+	    xair = dp_statr (dao, XAIRMASS)
+	else {
+	    iferr { 
+	        xair = imgetr (im, Memc[key])
+	    } then {
+		xair = dp_statr (dao, XAIRMASS)
+		call eprintf ("Warning: Image %s  Keyword: %s not found\n")
+		    call pargstr (IM_HDRFILE(im))
+		    call pargstr (Memc[key])
+	    }
+	}
+
+	# Store the value.
+	if (IS_INDEFR(xair) || xair <= 0.0)
+	    call dp_setr (dao, XAIRMASS, INDEFR)
+	else
+	    call dp_setr (dao, XAIRMASS, xair)
+
+	call sfree (sp)
+end