Index: trunk/psModules/src/camera/pmFPAMosaic.c
===================================================================
--- trunk/psModules/src/camera/pmFPAMosaic.c	(revision 11687)
+++ trunk/psModules/src/camera/pmFPAMosaic.c	(revision 11754)
@@ -737,16 +737,30 @@
         FIX_CONCEPT(targetCell->concepts, "CELL.Y0", S32, 0);
     }
-    int xParityTarget = psMetadataLookupS32(&mdok, targetCell->concepts, "CELL.XPARITY");
-    if (!mdok || (xParityTarget != -1 && xParityTarget != 1)) {
+    int xParityCellTarget = psMetadataLookupS32(&mdok, targetCell->concepts, "CELL.XPARITY");
+    if (!mdok || (xParityCellTarget != -1 && xParityCellTarget != 1)) {
         psLogMsg(__func__, PS_LOG_WARN, "CELL.XPARITY is not set for the target cell; assuming 1.\n");
         FIX_CONCEPT(targetCell->concepts, "CELL.XPARITY", S32, 1);
-        xParityTarget = 1;
-    }
-    int yParityTarget = psMetadataLookupS32(&mdok, targetCell->concepts, "CELL.YPARITY");
-    if (!mdok || (yParityTarget != -1 && yParityTarget != 1)) {
+        xParityCellTarget = 1;
+    }
+    int yParityCellTarget = psMetadataLookupS32(&mdok, targetCell->concepts, "CELL.YPARITY");
+    if (!mdok || (yParityCellTarget != -1 && yParityCellTarget != 1)) {
         psLogMsg(__func__, PS_LOG_WARN, "CELL.YPARITY is not set for the target cell; assuming 1.\n");
         FIX_CONCEPT(targetCell->concepts, "CELL.YPARITY", S32, 1);
-        yParityTarget = 1;
-    }
+        yParityCellTarget = 1;
+    }
+    int xParityChipTarget = psMetadataLookupS32(&mdok, targetCell->parent->concepts, "CHIP.XPARITY");
+    if (!mdok || (xParityChipTarget != -1 && xParityChipTarget != 1)) {
+        psLogMsg(__func__, PS_LOG_WARN, "CHIP.XPARITY is not set for the target chip; assuming 1.\n");
+        FIX_CONCEPT(targetCell->parent->concepts, "CHIP.XPARITY", S32, 1);
+        xParityChipTarget = 1;
+    }
+    int yParityChipTarget = psMetadataLookupS32(&mdok, targetCell->parent->concepts, "CHIP.YPARITY");
+    if (!mdok || (yParityChipTarget != -1 && yParityChipTarget != 1)) {
+        psLogMsg(__func__, PS_LOG_WARN, "CHIP.YPARITY is not set for the target chip; assuming 1.\n");
+        FIX_CONCEPT(targetCell->parent->concepts, "CHIP.YPARITY", S32, 1);
+        yParityChipTarget = 1;
+    }
+    int xParityTarget = xParityChipTarget * xParityCellTarget;
+    int yParityTarget = yParityChipTarget * yParityCellTarget;
 
     // Binning for the mosaicked chip is the minimum binning allowed by the cells