Index: branches/eam_branches/ipp-20111110/ippconfig/recipes/ppSub.config
===================================================================
--- branches/eam_branches/ipp-20111110/ippconfig/recipes/ppSub.config	(revision 32645)
+++ branches/eam_branches/ipp-20111110/ippconfig/recipes/ppSub.config	(revision 32694)
@@ -219,4 +219,13 @@
 END
 
+SSTF_DIFF METADATA
+	DUAL		BOOL	FALSE	# Dual convolution?
+	INVERSE		BOOL	FALSE   # Generate inverse subtraction?
+	PHOTOMETRY	BOOL	TRUE	# Perform photometry?
+	NOCONVOLVE      BOOL    TRUE
+	CONVOLVE.TARGET STR     SINGLE2	# convolution direction
+END
+ 
+
 # Gene's choice: multiplying by 1.75
 #@ISIS.WIDTHS	F32	1.8 3.3 5.8 10.2 17.9	# Gaussian FWHMs for ISIS kernels
Index: branches/eam_branches/ipp-20111110/ippconfig/recipes/psphot.config
===================================================================
--- branches/eam_branches/ipp-20111110/ippconfig/recipes/psphot.config	(revision 32645)
+++ branches/eam_branches/ipp-20111110/ippconfig/recipes/psphot.config	(revision 32694)
@@ -216,7 +216,7 @@
 # @RADIAL.ANNULAR.BINS.UPPER           F32      1.2 3.4 5.2 8.8 15.0 23.2 37.2 57.1 91.0 141.0 221.1 345.0 539.1 841.0 1305.0 #
 
-# PS1 values?
-@RADIAL.ANNULAR.BINS.LOWER           F32      0.0 1.2 3.4 5.2  8.8 15.0 23.2 37.2 57.1  91.0 141.0  # perl parser fails without a comment ticket #1476
-@RADIAL.ANNULAR.BINS.UPPER           F32      1.2 3.4 5.2 8.8 15.0 23.2 37.2 57.1 91.0 141.0 221.1  # perl parser fails without a comment ticket #1476
+# PS1 values? (revised fpr PS1 @0.25 arcsec pixel scales) 
+@RADIAL.ANNULAR.BINS.LOWER           F32      0.0 0.96 2.72 4.16 7.04 12.0 18.56 29.76 45.68 72.80 112.80    # perl parser fails without a comment ticket #1476 still?
+@RADIAL.ANNULAR.BINS.UPPER           F32      0.96 2.72 4.16 7.04 12.0 18.56 29.76 45.68 72.80 112.80 176.88 # perl parser fails without a comment ticket #1476 still?
 
 # Extended source fit parameters
@@ -355,4 +355,7 @@
   PETROSIAN_FOR_STARS                 BOOL  FALSE
 
+  CONSTANT_PHOTOMETRIC_WEIGHTS        BOOL  TRUE 
+  POISSON.ERRORS.PHOT.LMM             BOOL  TRUE
+
   EXT_FIT_MAX_RADIUS                  F32   50.0
   PSF_MODEL                           STR   PS_MODEL_GAUSS 
@@ -505,4 +508,11 @@
 END
 
+SSTF_DIFF METADATA
+  PEAKS_NSIGMA_LIMIT_2                F32   4.0             # peak significance threshold  
+  DIFF_STATS			    BOOL TRUE	       # Calculate diff-specific stats
+  OUTPUT.FORMAT		            STR  PS1_DV2       # Format of output file
+END
+
+
 # Recipe overrides for PR reduction
 PR	METADATA
Index: branches/eam_branches/ipp-20111110/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- branches/eam_branches/ipp-20111110/ippconfig/recipes/reductionClasses.mdc	(revision 32645)
+++ branches/eam_branches/ipp-20111110/ippconfig/recipes/reductionClasses.mdc	(revision 32694)
@@ -165,4 +165,6 @@
         PSVIDEOPHOT             STR     PSVIDEOPHOT
 END
+
+
 
 # basic science analysis
@@ -262,4 +264,5 @@
 
 
+
 DEFAULT_MASKTEST		METADATA
 	CHIP_PPIMAGE	STR	CHIP_MASKTEST
@@ -282,4 +285,75 @@
  	BACKGROUND_PSWARP	STR	BACKGROUND
 END
+
+# SSTF tests
+SSTF_NOCONV		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  SSTF_DIFF
+	DIFF_PSPHOT	  STR	  DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
+SSTF_NOCONV_4SIG		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  SSTF_DIFF
+	DIFF_PSPHOT	  STR	  SSTF_DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
+SSTF_4SIG		METADATA
+	CHIP_PPIMAGE	  STR	  CHIP
+	CHIP_PSPHOT	  STR	  CHIP
+	WARP_PSWARP	  STR	  WARP
+	STACK_PPSTACK	  STR	  STACK
+	STACK_PPSUB	  STR	  STACK
+	STACK_PSPHOT	  STR	  STACK
+	DIFF_PPSUB	  STR	  DIFF
+	DIFF_PSPHOT	  STR	  SSTF_DIFF
+	JPEG_BIN1	  STR	  PPIMAGE_J1
+	JPEG_BIN2	  STR	  PPIMAGE_J2
+	FAKEPHOT	  STR	  FAKEPHOT
+	ADDSTAR		  STR	  ADDSTAR
+	PSASTRO		  STR	  DEFAULT_RECIPE
+	STACKPHOT_PSPHOT  STR     STACKPHOT
+	STACKPHOT_PPSUB   STR     STACKPHOT
+	STACKPHOT_PPSTACK STR     STACKPHOT
+	STACKPHOT_SINGLE_PSPHOT  STR     STACKPHOT_SINGLE
+	BACKGROUND_PPBACKGROUND	STR	BACKGROUND
+	BACKGROUND_PSWARP	STR	BACKGROUND
+        PSVIDEOPHOT             STR     PSVIDEOPHOT
+END
+
 
 # reduction class specifically for warpwarp diffs: