[GEMPAK #UJC-775486]: Trouble plotting Isallobaric wind in Gempak

Michael,

Multiple files in GDPLOT2 can be defined using the exclamation point "!" to 
separate each.

I was able to plot ISAL and HGHT from two grid files using the following 
definitions, with each part separated by "!" tied to the GDFILE definition:

 GDFILE   = $MODEL/ruc/2012050211_ruc236.gem ! $MODEL/ruc/2012050212_ruc236.gem
 GDATTIM  = f000:f003 ! f000
 GLEVEL   = 500
 GVCORD   = pres
 PANEL    = 0
 SKIP     = 0
 SCALE    = 999
 GDPFUN   = knts(mag(isal)) ! hght

see if this can get you where you want to go, and let me know if you have any 
more questions.

Best,

Michael James
Unidata




> Hi,
> 
> I'm getting the following errors when trying to calculate the isallobaric 
> wind...
> 
> [GDPLOT 2]  The requested scalar/vector cannot be computed.
> [DG -18]  TIME  ^100313/0600F000 in KNTV must be a time range.
> [GDPLOT 2]  The requested scalar/vector cannot be computed.
> 
> Might it have something to do with the fact that I'm using the analyses of a 
> series of runs instead of a range of forecast hours within one model run?
> 
> I posted the relevant portions of my code below...
> 
> GDFILE = ruc_20100313_0600.gem + ruc_20100313_0700.gem + ruc_20100313_0800.gem
> GDATTIM = 0600F000:0800F000 ! 0800F000
> GLEVEL = 925
> GVCORD = pres
> GFUNC = knts(mag(isal)) ! hght
> GVECT = kntv(isal)
> WIND = bk5//1.5
> 
> Thanks,
> 
> Mike
> 
> 
> 


Ticket Details
===================
Ticket ID: UJC-775486
Department: Support GEMPAK
Priority: Normal
Status: Open