Index: /branches/eam_branches/ipp-pstamp-20260421/ippconfig/recipes/ppSim.config
===================================================================
--- /branches/eam_branches/ipp-pstamp-20260421/ippconfig/recipes/ppSim.config	(revision 43068)
+++ /branches/eam_branches/ipp-pstamp-20260421/ippconfig/recipes/ppSim.config	(revision 43069)
@@ -7,6 +7,8 @@
 
 OBS_MODE        STR     NONE
-
-BIAS            BOOL    FALSE
+MJD.OBS         F32     60000.0
+
+# include a BIASSEC region in the output image
+BIAS            BOOL    TRUE
 BIAS.LEVEL	F32	1000.0		# Bias level (e)
 BIAS.RANGE	F32	20.0		# Range of bias values (e)
Index: /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/format_split.config
===================================================================
--- /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/format_split.config	(revision 43068)
+++ /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/format_split.config	(revision 43069)
@@ -99,15 +99,15 @@
 	CHIP.X0.DEPEND	STR	CHIP.NAME
 	CHIP.X0		METADATA
-		Chip00	S32	0
-		Chip01	S32	0
-		Chip10	S32	2072
-		Chip11	S32	2072
+		Chip00	S32	-2072
+		Chip01	S32	-2072
+		Chip10	S32     0
+		Chip11	S32	0
 	END
 	CHIP.Y0.DEPEND	STR	CHIP.NAME
 	CHIP.Y0		METADATA
-		Chip00	S32	0
-		Chip01	S32	2072
-		Chip10	S32	0
-		Chip11	S32	2072
+		Chip00	S32	-2072
+		Chip01	S32	0
+		Chip10	S32	-2072
+		Chip11	S32	0
 	END
 	CELL.XSIZE	S32	1000
Index: /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/ppImage.config
===================================================================
--- /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/ppImage.config	(revision 43068)
+++ /branches/eam_branches/ipp-pstamp-20260421/ippconfig/simmosaic/ppImage.config	(revision 43069)
@@ -7,6 +7,10 @@
 
 OVERSCAN.SINGLE         BOOL    FALSE            # Reduce overscan to a single value?
-OVERSCAN.STAT           STR     MEDIAN
-OVERSCAN.BOXCAR         S32     3
+OVERSCAN.FIT		STR	POLYNOMIAL	# NONE | POLYNOMIAL | SPLINE
+OVERSCAN.ORDER		S32	7		# Order of polynomial fit (matches ppSim.config BIAS.ORDER)
+OVERSCAN.STAT           STR     MEAN
+
+# OVERSCAN.STAT           STR     MEDIAN
+# OVERSCAN.BOXCAR         S32     3
 
 # Normalization class
@@ -14,7 +18,4 @@
 
 OLDDARK                 BOOL    FALSE
-
-# use the deburned image instead of the raw, if it exists
-USE.DEBURNED.IMAGE      BOOL    TRUE           # use burntool-repaired image?
 
 # crosstalk measurements : only valid for GPC1 for now