> Extract u and v fields from the FNL archive according to pressure level
I want to extract the u and v fields from the FNL archive according to
the pressure level in some locations. Is this possible?
You can extract a regional subgrid from any ARL packed data set using the
utility program "xtrct_grid" in the \metdata subdirectory. However this program
will extract all fields. The purpose of these programs is to simplify Hysplit
simulations rather than provide general meteorological support. There are no
programs that permit just the extraction of one or two fields. You can write
your own programs to do that using the source code provided in the
\metdata\source directory using the "chk_????" programs as a starting point.
This process does require a thorough understanding of the structure of the
packed data. Much of this detail can be found in the user's guide.