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Re: FW: plotting 500mb height falls

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  • Subject: Re: FW: plotting 500mb height falls
  • Date: Wed, 18 Oct 2006 15:12:02 -0600
Frank,

Your GDATTIM and GFUNC specifications are incorrect.
Using your GDFILE settings, try:

GDATTIM = 061018/1200f000
GFUNC = sub(hght,hght+2^17/1200f000)

Since your grids are in 2 different files, you can not use the TDF
function,
and the grid times of the 500mb hghts are not time ranges (eg
TIME1:TIME2).
The first hght grid in GFUNC will use the time in GDATTIM. The second
HGHT will have to have the time specified in line to override the
default GDATTIM. Also note
that you can't simply use F000 for the second hght term since that would
be assumed to mean 18/1200f000 using the default time of the first file.

Note that if you are using the datatype.tbl entry of NAM80 for a
template for your 211 NAM grids, then GDFILE can be:
nam80|18/1200+nam80|17/1200

Steve Chiswell
Unidata User Support


On Wed, 2006-10-18 at 16:17 -0400, Frank J. Marsik wrote:
> GDFILE  = /home/ldm/data/gempak/model/nam/2006101812_nam211.gem
> + /home/ldm/data/gempak/model/nam/2006101712_nam211.gem
> GDATTIM = 06101812/f00:06101712/f00
> CONTUR  = 1
> CLEAR   = y
> GAREA   = NCNA
> PROJ    = STR/90;-105;0
> MAP     = 2//2
> LATLON  = 18/10/1/1/5;5
> PANEL   = 0
> TEXT    = 1/21//hw
> CLRBAR  = 1
> REFVEC  = 
> 
> # 500mb Height Falls
> 
> DEVICE  = XW
> GLEVEL  = 500
> GVCORD  = PRES
> SKIP    = 
> SCALE   =                
> GFUNC   = sub(hght,hght+2)    
> CTYPE   = c                
> CINT    = 2/0/100                 
> LINE    = 7/5/3/2         
> FINT    = 
> FLINE   = 
> HILO    =    
> HLSYM   =
> GVECT   =
> WIND    =
> TITLE   = 5/0/~ NAM 500MB HEIGHT TENDENCY (M)                 
> CLEAR   = yes   
-- 
Steve Chiswell <address@hidden>
Unidata