[Wrf-users] is wrfpost missing STAND_LON?
Rorik Peterson
ffrap1 at uaf.edu
Fri Oct 20 18:19:05 MDT 2006
I recently ran into a problem with the navigation information in the
GRIB files being generated by wrfpost. I'm working with a non-standard
grid where the vertical line of longitude (i.e. parallel to the y-axis)
is not in the center of the domain, but offset many degrees. However,
the GRIB files being generated by wrfpost have the vertical line of
longitude listed as the domain-center longitude (octets 18-20 in the
GDS). For example, the WRF NetCDF files have the following attributes:
:CEN_LAT = 65.4f ;
:CEN_LON = -160.2f ;
:TRUELAT1 = 67.5f ;
:TRUELAT2 = 90.f ;
:MOAD_CEN_LAT = 65.40175f ;
:STAND_LON = -150.f ;
but the GRIB files has -160.2 degrees as the vertical longitude instead
of STAND_LON, or -150. You can see a picture of this domain here:
http://pileus.arsc.alaska.edu/weather/WRFSims/NorthAlaska6/NorthAlaska6-d01/
I looked quickly through the source code for wrfpost and it appears that
wrfpost never reads the STAND_LON attribute, and proceeds to write the
CEN_LON value to GDS octets 18-20.
I'm wondering if I am wrong in my interpretation of this, or maybe I
have such a non-standard situation, no one has run into this issue before.
Thanks for any insight and help,
rorik
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