Index: trunk/BNC/bnchelp.html
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--- trunk/BNC/bnchelp.html	(revision 2194)
+++ trunk/BNC/bnchelp.html	(revision 2195)
@@ -993,5 +993,5 @@
 <p><a name="ppptropo"><h4>3.11.2.3 Estimate Tropo - optional</h4></p>
 <p>
-By default BNC does not introduce troposphere parameters when estimating coordinates. Tick 'Estimate tropo' to introduce troposphere parameters when estimating coordinates.
+By default BNC does not estimate troposphere parameters. Tick 'Estimate tropo' to estimate troposphere parameters together with the coordinates.
 </p>