Index: /trunk/ippconfig/simple/ppImage.config
===================================================================
--- /trunk/ippconfig/simple/ppImage.config	(revision 11476)
+++ /trunk/ippconfig/simple/ppImage.config	(revision 11477)
@@ -21,4 +21,23 @@
 OVERSCAN.STAT		STR	MEAN		# MEAN | MEDIAN
 
+# How to select the appropriate detrend image
+DETREND.CONSTRAINTS  METADATA
+  BIAS METADATA
+  END
+  DARK METADATA
+    EXPTIME STR FPA.EXPTIME
+  END
+  FLAT METADATA
+    FILTER  STR FPA.FILTER
+    VERSION STR RAW
+  END
+  FRINGE METADATA
+    FILTER   STR FPA.FILTER
+    AIRMASS  STR FPA.AIRMASS
+    TWILIGHT STR FPA.TIME
+  END
+  SHUTTER METADATA
+  END	
+END
 
 ####################################################################################
@@ -88,5 +107,5 @@
   SHUTTER         BOOL    FALSE            # Shutter correction
   FLAT            BOOL    TRUE            # Flat-field normalisation
-  MASK            BOOL    TRUE            # Mask bad pixels
+  MASK            BOOL    FALSE            # Mask bad pixels
   FRINGE          BOOL    FALSE           # Fringe subtraction
 END
@@ -99,5 +118,5 @@
   SHUTTER         BOOL    FALSE            # Shutter correction
   FLAT            BOOL    TRUE            # Flat-field normalisation
-  MASK            BOOL    TRUE            # Mask bad pixels
+  MASK            BOOL    FALSE           # Mask bad pixels
   FRINGE          BOOL    TRUE            # Fringe subtraction
 END