Index: trunk/ippconfig/gpc2/ppImage.config
===================================================================
--- trunk/ippconfig/gpc2/ppImage.config	(revision 43022)
+++ trunk/ippconfig/gpc2/ppImage.config	(revision 43049)
@@ -2154,4 +2154,44 @@
 
   OVERSCAN.MIN.VALID F32     1.0 	     # minimum valid overscan value 
-  OVERSCAN.MAX.VALID F32     60000.0	     # maximum valid overscan value 
-END
+  OVERSCAN.MAX.VALID F32     50000.0	     # maximum valid overscan value 
+END
+
+# chip processing with only overscan
+CHIP_OVERSCAN_MASK  METADATA
+  BASE.FITS          BOOL    FALSE           # Save base detrended image?
+  BASE.MASK.FITS     BOOL    FALSE           # Save base detrended image?
+  BASE.VARIANCE.FITS BOOL    FALSE           # Save base detrended image?
+  CHIP.FITS          BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.MASK.FITS     BOOL    TRUE            # Save chip-mosaic-ed image? 
+  CHIP.VARIANCE.FITS BOOL    TRUE            # Save chip-mosaic-ed image? 
+  OVERSCAN           BOOL    TRUE            # Overscan subtraction
+  NONLIN             BOOL    FALSE           # apply non-linearity correction 
+  BIAS               BOOL    FALSE           # Bias subtraction
+  DARK               BOOL    FALSE           # Dark subtraction
+  NOISEMAP           BOOL    FALSE           # Apply noise read map
+  REMNANCE           BOOL    FALSE           # Remnance masking
+  SHUTTER            BOOL    FALSE           # Shutter correction
+  FLAT               BOOL    FALSE           # Flat-field normalisation
+  MASK               BOOL    FALSE           # Mask bad pixels
+  MASK.BUILD         BOOL    TRUE            # Build internal mask?
+  MASK.BURNTOOL      BOOL    FALSE           # Mask potential burntool trails
+  MASK.AUXMASK       BOOL    FALSE           # augment mask with more restrictive auxiliary mask
+  PATTERN.ROW        BOOL    FALSE           # Row pattern correction
+  PATTERN.CELL       BOOL    FALSE           # Cell pattern correction
+  PATTERN.CONTINUITY BOOL    FALSE           # Cell pattern correction using edge continuity
+  FRINGE             BOOL    FALSE           # Fringe subtraction
+  BIN1.FITS          BOOL    TRUE            # Save 1st binned chip image?
+  BIN2.FITS          BOOL    TRUE            # Save 2nd binned chip image?
+  PHOTOM             BOOL    FALSE           # Source identification and photometry
+  ASTROM.CHIP        BOOL    FALSE           # Astrometry per chip?
+  ASTROM.MOSAIC      BOOL    FALSE           # Astrometry for mosaic?
+  BACKGROUND         BOOL    FALSE           # Subtract background?
+  CROSSTALK.MEASURE  BOOL    FALSE           # Subtract model background?
+  APPLY.BURNTOOL     BOOL    FALSE           # apply burntool correction in ppImage
+  USE.DEBURNED.IMAGE BOOL    FALSE           # use burntool-repaired image?
+  USE.BEST.BURNTOOL  BOOL    FALSE           # require the best burntooled data
+  MASK.BAD.OVERSCAN  BOOL    TRUE
+
+  OVERSCAN.MIN.VALID F32     1.0 	     # minimum valid overscan value 
+  OVERSCAN.MAX.VALID F32     50000.0	     # maximum valid overscan value 
+END