Index: /branches/eam_branches/ipp-20111122/Ohana/src/uniphot/src/load_zpt_table.c
===================================================================
--- /branches/eam_branches/ipp-20111122/Ohana/src/uniphot/src/load_zpt_table.c	(revision 33198)
+++ /branches/eam_branches/ipp-20111122/Ohana/src/uniphot/src/load_zpt_table.c	(revision 33199)
@@ -112,6 +112,8 @@
     NCELL_X = 2;
     NCELL_Y = 2;
-    CHIP_DX = 4880;
-    CHIP_DY = 4864;
+    CHIP_DX = 2*2424;  // != 4880
+    CHIP_DY = 2*2430;  // != 4864
+    // Note that Eddie has identified the center of the boundary between cells xy3n and
+    // xy4n and used that to split the chip.  I am setting CHIP_DX,DY to force the same split
   } else {
     if (!gfits_scan (&header, "NSEASON", "%d", 1, &NSEASON)) {