Merge in a few small doc changes.

Merge branch 'sph_vec_doc_tweaks' into develop

src/Infrastructure/Field/src/ESMF_FieldRegrid.F90

@@ -548,9 +548,13 @@ subroutine ESMF_FieldRegridStoreNX(srcField, dstField, keywordEnforcer, &
 !     \item [{[vectorRegrid]}]
 !           If true, treat a single ungridded dimension in the source and destination Fields
 !           as the components of a vector. If true and there is more than one ungridded dimension in either
-!           the source or destination, then an error will be returned. Currently this functionality only
+!           the source or destination, then an error will be returned. Currently, only undistributed (vector) dimensions of
+!           size 2 are supported. In the vector dimension, the first entry is interpreted as the east component and the
+!           second as the north component.
+!           In addition, this functionality presently only
 !           works when both the source and destination Fields are build on a geometry (e.g. an ESMF Grid) with
-!           a spherical coordinate system (e.g. ESMF\_COORDSYS\_SPH\_DEG). See section~\ref{sec::vectorRegrid} for further
+!           a spherical coordinate system (e.g. ESMF\_COORDSYS\_SPH\_DEG). We expect these restrictions to be loosened over
+!           time as new requirements come in from users. See section~\ref{sec::vectorRegrid} for further
 !           information on this functionality. If not specified, this argument defaults to false.
 !     \item [{[extrapMethod]}]
 !           The type of extrapolation. Please see Section~\ref{opt:extrapmethod} 

src/doc/ESMF_infradataoverview.tex

@@ -782,16 +782,15 @@ \subsubsection{Vector regridding}\label{sec::vectorRegrid}
 However, the weight matrix will be in the format that allows it to contain tensor dimension indices (i.e. the leading
 dimension of the {\tt factorIndexList} will be of size 4). 
 
-In this initial version the meaning of the different components in the vector is fixed. They will be interpreted as:
+In this initial version, the meaning of the different entries in the vector dimension are fixed. They will be interpreted as:
 \vspace{-1em}
 \begin{description}
   \itemsep0em
-  \item[1st component] the east value
-  \item[2nd component] the north value
+  \item[1st entry] the east component of the vector
+  \item[2nd entry] the north component of the vector
 \end{description}
 
-Note that because the different components are mixed, using vector regridding with a conservative regrid method will not necessarily produce vectors whose components
-are conservative. 
+Note that because the different components are mixed, using vector regridding with a conservative regrid method will not necessarily produce vectors whose components are conservative. 
 
 
 \subsubsection{Troubleshooting guide}