Index: /trunk/BNC/combination/bnccomb.cpp
===================================================================
--- /trunk/BNC/combination/bnccomb.cpp	(revision 3443)
+++ /trunk/BNC/combination/bnccomb.cpp	(revision 3444)
@@ -732,5 +732,5 @@
 
   pp->eph = lastEph;
-  pp->xx  += dC * t_CST::c;
-}
-
+  pp->xx  -= dC * t_CST::c;
+}
+