Index: trunk/ippToPsps/config/tables.ST.vot
===================================================================
--- trunk/ippToPsps/config/tables.ST.vot	(revision 38766)
+++ trunk/ippToPsps/config/tables.ST.vot	(revision 38767)
@@ -48,5 +48,5 @@
       </FIELD>
       <FIELD name="astroScat" arraysize="1" datatype="float" unit="dimensionless" default="-999">
-        <DESCRIPTION>Astrometric scatter relative to reference catalog.</DESCRIPTION>
+        <DESCRIPTION>Measurement of the calibration (not astrometric error) defined to be SQRT(AST_CDX^2 + AST_CDY^2)</DESCRIPTION>
       </FIELD>
       <FIELD name="photoScat" arraysize="1" datatype="float" unit="dimensionless" default="-999">
Index: trunk/ippToPsps/jython/stackbatch.py
===================================================================
--- trunk/ippToPsps/jython/stackbatch.py	(revision 38766)
+++ trunk/ippToPsps/jython/stackbatch.py	(revision 38767)
@@ -227,4 +227,8 @@
         psfmodel    = self.getKeyValue(header, 'PSFMODEL')
 
+        ast_cdx = self.getKeyFloat(header, "%.8f",'AST_CDX')
+        ast_cdy = self.getKeyFloat(header, "%.8f",'AST_CDY')
+        astroscat = sqrt(ast_cdx^2 + ast_cdy^2)
+        
         # make a table
         filterID = self.scratchDb.getFilterID(filter)
@@ -257,5 +261,6 @@
         sqlLine.group("psfModelID",    psfmodel)           
         sqlLine.group("psfFwhm_mean",  fwhm_maj)      
-        sqlLine.group("psfFwhm_max",   fwhm_maj_uq)    
+        sqlLine.group("psfFwhm_max",   fwhm_maj_uq)
+        sqlLine.group("astroScat", astroscat)
         sqlLine.group("photoZero",     self.getKeyFloat(header, "%.5f", 'FPA.ZP'))
         sqlLine.group("ctype1",        header['CTYPE1'])