Index: trunk/BNC/src/PPP/filter.cpp
===================================================================
--- trunk/BNC/src/PPP/filter.cpp	(revision 5798)
+++ trunk/BNC/src/PPP/filter.cpp	(revision 5799)
@@ -206,5 +206,11 @@
     // Kalman update step
     // ------------------
-    bncModel::kalman(AA, ll, Sl, _QFlt, _xFlt);
+    //// beg test
+    DiagonalMatrix PP(iObs+1);
+    for (int ii = 1; ii < iObs+1; ii++) {
+      PP(ii,ii) = Sl(ii,ii) * Sl(ii,ii);
+    }
+    bncModel::kalman(AA, ll, PP, _QFlt, _xFlt);
+    //// end test
 
     // Check Residuals