Index: /trunk/BNC/bnchelp.html
===================================================================
--- /trunk/BNC/bnchelp.html	(revision 2477)
+++ /trunk/BNC/bnchelp.html	(revision 2478)
@@ -1114,13 +1114,13 @@
 <p><a name="pppsigma"><h4>3.11.3 Sigma Code - mandatory if 'Use Phase Obs' is set</h4></p>
 <p>
-When 'Use phase obs' is set in BNC the PPP solution will be carried out using both code and phase observations. A sigma of 5.0 m for code observations and a sigma of 0.02 m for phase observations (defauls) is used to combine both types of observations. 
-As the convergence characteristic of a PPP solution can be influenced by the ratio of the sigmas for code and phase observations, you may like to introduce you own sigma for code observations which differs from the default of 5.0 m.
-<ul>
-<li>Introducing a smaller sigma (higher accuracy) for code observations leads to better results shortly after the program start. However, it may take more time till you finally get the best possible coordinates.</li>
-<li>Introducing a higher sigma (lower accuracy) for code observations may lead to a prolonged convergence time but more rapidly provide the final accurate coordinates.</li>
-</ul>
-</p>
-<p>
-Note that only values between 0.3 m and 50.0 m are accepted as code sigma.
+When 'Use phase obs' is set in BNC the PPP solution will be carried out using both, code and phase observations. A sigma of 5.0 m for code observations and a sigma of 0.02 m for phase observations (defauls) is used to combine both types of observations. 
+As the convergence characteristic of a PPP solution can be influenced by the ratio of the sigmas for code and phase, you may like to introduce you own sigma for code observations which differs from the default of 5.0 m.
+<ul>
+<li>Introducing a smaller sigma (higher accuracy) for code observations leads to better results shortly after program start. However, it may take more time till you finally get the best possible solutions.</li>
+<li>Introducing a higher sigma (lower accuracy) for code observations may lead to less accurate results shortly after program start and thus a prolonged period of convergence but could provide better positions in the long run.</li>
+</ul>
+</p>
+<p>
+Note that the 'Sigma code' you enter must be greater than 0.3 m and less than 50.0 m.
 </p>