Index: /trunk/BNC/bncephuser.cpp
===================================================================
--- /trunk/BNC/bncephuser.cpp	(revision 4213)
+++ /trunk/BNC/bncephuser.cpp	(revision 4214)
@@ -238,8 +238,10 @@
     tRao.set(GPSweek, GPSweeks);
 
-    dClk       = 0.0;
-    dotDClk    = 0.0;
-    dotDotDClk = 0.0;
-    tClk.reset();
+    if (tClk != tRao) {
+      dClk       = 0.0;
+      dotDClk    = 0.0;
+      dotDotDClk = 0.0;
+      tClk.reset();
+    }
   }
   else if ( messageType == COTYPE_GPSCLOCK    ||