Index: /trunk/BNC/src/PPP/pppMain.cpp
===================================================================
--- /trunk/BNC/src/PPP/pppMain.cpp	(revision 5996)
+++ /trunk/BNC/src/PPP/pppMain.cpp	(revision 5997)
@@ -170,6 +170,6 @@
     opt->_antexFileName = settings.value("PPP/antexFile").toString().toAscii().data();
 
-    opt->_sigmaC1      = settings.value("PPP/sigmaC1").toDouble();
-    opt->_sigmaL1      = settings.value("PPP/sigmaL1").toDouble();
+    opt->_sigmaC1      = settings.value("PPP/sigmaC1").toDouble(); if (opt->_sigmaC1 <= 0.0) opt->_sigmaC1 =  2.0;
+    opt->_sigmaL1      = settings.value("PPP/sigmaL1").toDouble(); if (opt->_sigmaL1 <= 0.0) opt->_sigmaL1 = 0.01;
     opt->_corrWaitTime = settings.value("PPP/corrWaitTime").toDouble();
 
@@ -228,8 +228,8 @@
     }
 
-    opt->_minObs      = settings.value("PPP/minObs").toInt();
+    opt->_minObs      = settings.value("PPP/minObs").toInt(); if (opt->_minObs < 4) opt->_minObs = 4;
     opt->_minEle      = settings.value("PPP/minEle").toDouble() * M_PI / 180.0;
-    opt->_maxResC1    = settings.value("PPP/maxResC1").toDouble();
-    opt->_maxResL1    = settings.value("PPP/maxResL1").toDouble();
+    opt->_maxResC1    = settings.value("PPP/maxResC1").toDouble(); if (opt->_maxResC1 <= 0.0) opt->_maxResC1 = 3.0;
+    opt->_maxResL1    = settings.value("PPP/maxResL1").toDouble(); if (opt->_maxResL1 <= 0.0) opt->_maxResL1 = 0.03;
     opt->_eleWgtCode  = (settings.value("PPP/eleWgtCode").toInt() != 0);
     opt->_eleWgtPhase = (settings.value("PPP/eleWgtPhase").toInt() != 0);