Index: /branches/eam_branches/ipp-pstamp-20260421/ppSim/src/ppSimInsertStars.c
===================================================================
--- /branches/eam_branches/ipp-pstamp-20260421/ppSim/src/ppSimInsertStars.c	(revision 43078)
+++ /branches/eam_branches/ipp-pstamp-20260421/ppSim/src/ppSimInsertStars.c	(revision 43079)
@@ -66,7 +66,7 @@
 
     // EAM : I think this dX,dY double-counts the offset applied to xChip,yChip in pmSourceFromModel
-    int dX = PM_CELL_TO_CHIP (0.0, x0Cell, xParityCell, binning);
-    int dY = PM_CELL_TO_CHIP (0.0, y0Cell, yParityCell, binning);
-    dX = 0; dY = 0;
+    int dX = -PM_CELL_TO_CHIP (0.0, x0Cell, xParityCell, binning);
+    int dY = -PM_CELL_TO_CHIP (0.0, y0Cell, yParityCell, binning);
+    // dX = 0; dY = 0;
 
     psArray *sources = psArrayAllocEmpty (stars->n);