[gradsusr] BUFR station data

[Mark J. Dempsey]

Hi all,
I have a question about BUFR station data. Do I have to run the stnmap  
utility on my BUFR descriptor file?
My descriptor file looks like this:

DSET ^../5900.20040601.surface
TITLE Station surface data
UNDEF -99999
DTYPE BUFR
STID 1,2
XVAR 6,2
YVAR 5,2
ZVAR 7,1
TVAR yr 4,1 mo 4,2 dy 4,3 hr 4,4 mn 4,5
TDEF 24 LINEAR 00Z31may2004 1hr
VARS 10
stid 0 1,2 WMO station ID
tsig 0 8,21 Time significance
tdispl 0 4,0 Time period or displacement
wspd 0 11,2 Wind speed
wdir 0 11,1 Wind direction (degree true)
ps 0 10,4 pressure
slp 0 10, 51 pressure reduced to mean sea level
ts 0 12,1 Temperature/Air temperature
rh 0 13,3 Relative humidity
p 0 13,14 Rainfall/water equivalent of snow
ENDVARS

I'm still pretty new to GRADS. I wonder if anyone knows of a tutorial  
out there that works with BUFR Station data? It would be helpful to  
see some examples that people have worked with. I'd like to practice  
working with station data. Thanks in advance for any help.
kind regards,
Mark J. Dempsey