Index: trunk/BNC/src/rinex/polarplot.cpp
===================================================================
--- trunk/BNC/src/rinex/polarplot.cpp	(revision 4323)
+++ trunk/BNC/src/rinex/polarplot.cpp	(revision 4324)
@@ -31,5 +31,5 @@
   for (int ii = from; ii <= to; ii++) {
     QwtSymbol ss(symbol);
-    t_polarData*        polarData = (t_polarData*) data();
+    const t_polarData*  polarData = reinterpret_cast<const t_polarData*>(data());
     const t_polarPoint& point     = polarData->sample(ii);
     if (point._value == 1) {
@@ -58,5 +58,5 @@
 
   double value = 0.0;
-  if (ii % 3 == 0) {
+  if (ii % 4 == 0) {
     value = 1.0;
   }