<p><b>weiwang</b> 2010-06-04 18:51:33 -0600 (Fri, 04 Jun 2010)</p><p>change in 4.3.2<br>
</p><hr noshade><pre><font color="gray">Modified: trunk/wrf/technote/filter.tex
===================================================================
--- trunk/wrf/technote/filter.tex        2010-04-20 19:18:02 UTC (rev 233)
+++ trunk/wrf/technote/filter.tex        2010-06-05 00:51:33 UTC (rev 234)
@@ -820,7 +820,8 @@
acoustic step (that is computed using
the time $\tau$ values of $U$ and $V$), and
$\gamma_e$ is the external mode damping coefficient. An external mode
-damping coefficient $\gamma_e = 0.01$ is typically used in the ARW
+damping coefficient $\gamma_e = \beta{\Delta x^2\over \Delta t}$,
+$\beta = 0.01$, is typically used in the ARW
applications, independent of time step or grid size.
\subsection{Semi-Implicit Acoustic Step Off-centering}
</font>
</pre>