Index: /trunk/ippconfig/cfh12k/camera.config
===================================================================
--- /trunk/ippconfig/cfh12k/camera.config	(revision 15611)
+++ /trunk/ippconfig/cfh12k/camera.config	(revision 15612)
@@ -127,21 +127,13 @@
 		FRINGE_STACK	STR	PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -175,4 +167,17 @@
 		JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
 	END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# Processing raw data
 	DEFAULT		METADATA
Index: /trunk/ippconfig/ctio_mosaic2/camera.config
===================================================================
--- /trunk/ippconfig/ctio_mosaic2/camera.config	(revision 15611)
+++ /trunk/ippconfig/ctio_mosaic2/camera.config	(revision 15612)
@@ -78,21 +78,13 @@
 		FRINGE_STACK	STR	PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -126,4 +118,17 @@
 		JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
 	END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# Processing raw data
 	DEFAULT		METADATA
Index: /trunk/ippconfig/esowfi/camera.config
===================================================================
--- /trunk/ippconfig/esowfi/camera.config	(revision 15611)
+++ /trunk/ippconfig/esowfi/camera.config	(revision 15612)
@@ -91,21 +91,13 @@
     FRINGE_STACK    STR  PPMERGE_FRINGE
 
-    # Generation of pixel masks from darks and flats
-    DARKMASK_PROCESS        STR     PPIMAGE_OBD
-    DARKMASK_RESID          STR     PPIMAGE_N
-    DARKMASK_VERIFY         STR     PPIMAGE_OBD
-    DARKMASK_STACK          STR     PPMERGE_MASK
-    FLATMASK_PROCESS        STR     PPIMAGE_OBDSF
-    FLATMASK_RESID          STR     PPIMAGE_N
-    FLATMASK_VERIFY         STR     PPIMAGE_OBDSF
-    FLATMASK_STACK          STR     PPMERGE_MASK
-    JPEG_BIN1_IMAGE_DARKMASK STR    PPIMAGE_J1_IMAGE_M
-    JPEG_BIN2_IMAGE_DARKMASK STR    PPIMAGE_J2_IMAGE_M
-    JPEG_BIN1_IMAGE_FLATMASK STR    PPIMAGE_J1_IMAGE_M
-    JPEG_BIN2_IMAGE_FLATMASK STR    PPIMAGE_J2_IMAGE_M
-    JPEG_BIN1_RESID_DARKMASK STR    PPIMAGE_J1_RESID_M
-    JPEG_BIN2_RESID_DARKMASK STR    PPIMAGE_J2_RESID_M
-    JPEG_BIN1_RESID_FLATMASK STR    PPIMAGE_J1_RESID_M
-    JPEG_BIN2_RESID_FLATMASK STR    PPIMAGE_J2_RESID_M
+	# Make masks from flats
+	MASK_PROCESS		STR	PPIMAGE_OBDSF
+	MASK_RESID		STR	PPIMAGE_N
+	MASK_VERIFY		STR	PPIMAGE_OBDSF
+	MASK_STACK		STR	PPMERGE_MASK
+	JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+	JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+	JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+	JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
     JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -139,4 +131,17 @@
     JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
   END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
   # Processing raw data
   DEFAULT    METADATA
Index: /trunk/ippconfig/gpc1/camera.config
===================================================================
--- /trunk/ippconfig/gpc1/camera.config	(revision 15611)
+++ /trunk/ippconfig/gpc1/camera.config	(revision 15612)
@@ -113,21 +113,13 @@
 		FRINGE_STACK	STR	PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -161,4 +153,17 @@
 		JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
 	END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# Processing raw data
 	DEFAULT		METADATA
Index: /trunk/ippconfig/megacam/camera.config
===================================================================
--- /trunk/ippconfig/megacam/camera.config	(revision 15611)
+++ /trunk/ippconfig/megacam/camera.config	(revision 15612)
@@ -138,21 +138,13 @@
                 FRINGE_STACK    STR     PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -187,4 +179,16 @@
 	END
 
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# basic science analysis
 	DEFAULT		METADATA
Index: /trunk/ippconfig/recipes/rejections.config
===================================================================
--- /trunk/ippconfig/recipes/rejections.config	(revision 15611)
+++ /trunk/ippconfig/recipes/rejections.config	(revision 15612)
@@ -120,29 +120,5 @@
 END
 
-DARKMASK METADATA
-  FILTER      	     STR  *
-  EXPECTED    	     F32  0.0
-  IMFILE.MEAN 	     F32  0.0
-  IMFILE.STDEV       F32  0.0
-  IMFILE.MEANSTDEV   F32  0.0
-  IMFILE.SKEWNESS    F32  0.0
-  IMFILE.KURTOSIS    F32  0.0
-  IMFILE.SNR         F32  0.0
-  IMFILE.BIN.STDEV   F32  0.0
-  IMFILE.BIN.SNR     F32  0.0
-  IMFILE.FLUX        F32  0.0
-  EXP.MEAN           F32  0.0
-  EXP.STDEV          F32  0.0
-  EXP.MEANSTDEV      F32  0.0
-  EXP.SNR            F32  0.0
-  EXP.BIN.STDEV      F32  0.0
-  EXP.BIN.SNR        F32  0.0
-  EXP.FLUX           F32  0.0
-  ENSEMBLE.MEAN      F32  0.0
-  ENSEMBLE.STDEV     F32  0.0
-  ENSEMBLE.MEANSTDEV F32  0.0
-END
-
-FLATMASK METADATA
+MASK METADATA
   FILTER      	     STR  *
   EXPECTED    	     F32  0.0
Index: /trunk/ippconfig/simmosaic/camera.config
===================================================================
--- /trunk/ippconfig/simmosaic/camera.config	(revision 15611)
+++ /trunk/ippconfig/simmosaic/camera.config	(revision 15612)
@@ -85,21 +85,13 @@
 		FRINGE_STACK	STR	PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -133,4 +125,17 @@
 		JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
 	END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# Processing raw data
 	DEFAULT		METADATA
Index: /trunk/ippconfig/simtest/camera.config
===================================================================
--- /trunk/ippconfig/simtest/camera.config	(revision 15611)
+++ /trunk/ippconfig/simtest/camera.config	(revision 15612)
@@ -71,21 +71,13 @@
 		FRINGE_STACK	STR	PPMERGE_FRINGE
 
-		# Generation of pixel masks from darks and flats
-		DARKMASK_PROCESS	STR	PPIMAGE_OBD
-		DARKMASK_RESID		STR	PPIMAGE_N
-		DARKMASK_VERIFY		STR	PPIMAGE_OBD
-		DARKMASK_STACK		STR	PPMERGE_MASK
-		FLATMASK_PROCESS	STR	PPIMAGE_OBDSF
-		FLATMASK_RESID		STR	PPIMAGE_N
-		FLATMASK_VERIFY		STR	PPIMAGE_OBDSF
-		FLATMASK_STACK		STR	PPMERGE_MASK
-		JPEG_BIN1_IMAGE_DARKMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_DARKMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_IMAGE_FLATMASK STR	PPIMAGE_J1_IMAGE_M
-		JPEG_BIN2_IMAGE_FLATMASK STR	PPIMAGE_J2_IMAGE_M
-		JPEG_BIN1_RESID_DARKMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_DARKMASK STR	PPIMAGE_J2_RESID_M
-		JPEG_BIN1_RESID_FLATMASK STR	PPIMAGE_J1_RESID_M
-		JPEG_BIN2_RESID_FLATMASK STR	PPIMAGE_J2_RESID_M
+		# Make masks from flats
+		MASK_PROCESS		STR	PPIMAGE_OBDSF
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBDSF
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
 
  		JPEG_BIN1_IMAGE_BIAS     STR  PPIMAGE_J1_IMAGE_B
@@ -119,4 +111,17 @@
 		JPEG_BIN2_RESID_FRINGE   STR  PPIMAGE_J2_RESID_R
 	END
+
+	# Additional reduction prescription for generating masks from darks
+	DARKMASK	METADATA
+		MASK_PROCESS		STR	PPIMAGE_OBD
+		MASK_RESID		STR	PPIMAGE_N
+		MASK_VERIFY		STR	PPIMAGE_OBD
+		MASK_STACK		STR	PPMERGE_MASK
+		JPEG_BIN1_IMAGE_MASK	STR	PPIMAGE_J1_IMAGE_M
+		JPEG_BIN2_IMAGE_MASK	STR	PPIMAGE_J2_IMAGE_M
+		JPEG_BIN1_RESID_MASK	STR	PPIMAGE_J1_RESID_M
+		JPEG_BIN2_RESID_MASK	STR	PPIMAGE_J2_RESID_M
+	END
+
 	# Processing raw data
 	DEFAULT		METADATA
