Index: trunk/BNS/bns.cpp
===================================================================
--- trunk/BNS/bns.cpp	(revision 2416)
+++ trunk/BNS/bns.cpp	(revision 2417)
@@ -599,5 +599,5 @@
     if (ii == 1) {
       XYZ_to_RSW(xB.Rows(1,3), vv, dx, rsw);
-      dClk = (xB(4) - xx(4) - xx(5)) * 299792458.0;
+      dClk = (xx(4) + xx(5) - xB(4)) * 299792458.0;
     }
     else {