[Dart-dev] [4661] DART/trunk/assim_tools/assim_tools_mod.html: New paragraph in the vert_normalization section pointing the way

[nancy at ucar.edu]

Revision: 4661
Author:   nancy
Date:     2011-01-20 15:19:38 -0700 (Thu, 20 Jan 2011)
Log Message:
-----------
New paragraph in the vert_normalization section pointing the way
to the location_mod documentation for help setting up vertical
localization in the desired units.

Modified Paths:
--------------
    DART/trunk/assim_tools/assim_tools_mod.html

-------------- next part --------------
Modified: DART/trunk/assim_tools/assim_tools_mod.html
===================================================================
--- DART/trunk/assim_tools/assim_tools_mod.html	2011-01-20 22:18:29 UTC (rev 4660)
+++ DART/trunk/assim_tools/assim_tools_mod.html	2011-01-20 22:19:38 UTC (rev 4661)
@@ -46,6 +46,7 @@
 to it at the same time is described in Anderson (2007).
 </P>
 
+<H4>Filter Types</H4>
 <A NAME="FilterTypes"></A>
 <P>
 Available observation space filter types include:
@@ -63,9 +64,9 @@
 </P>
 
 
+<H4>Localization</H4>
 <A NAME="Localization"></A>
 <P>
-<br>
 <em>Localization</em> controls how far the impact of an observation extends.
 The namelist items related to localization are spread over several
 different individual namelists, so we have made a single collected 
@@ -143,8 +144,21 @@
 cutoff will be a perfect sphere.  If you want to localize over a larger
 distance in the vertical than horizontal, use a larger value.  If you want
 to localize more sharply in the vertical, use a smaller number.
+The type of localization used is set by which type of vertical coordinate 
+the observations and state vector items have.
 <br>
 <br>
+If you have observations with different vertical coordinates (e.g. pressure
+and height), or if your observations have a different vertical coordinate
+than your state vector items, or if you want to localize in a different
+type of unit than your normal vertical coordinate (e.g. your model uses
+pressure in the vertical but you wish to localize in meters), then you
+will need to modify or add a <em class=code>get_close()</em> routine
+in your <em class=file>model_mod.f90</em> file.  See the discussion in
+the <a href="../location/threed_sphere/location_mod.html">location module</a>
+documentation for how to transform vertical coordinates before localization.
+<br>
+<br>
 <dt>
 <em>&amp;assim_tools_nml :: adaptive_localization_threshold<br></em>
 valid values: integer counts, or -1 to disable