[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[McIDAS #APD-338129]: GFS data on ADDE.UCAR.EDU

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [McIDAS #APD-338129]: GFS data on ADDE.UCAR.EDU
  • Date: Fri, 07 Mar 2008 20:24:58 -0700
Hi Jack,

Sorry for the tardy reply...

re:
> I've been looking at the GFS output from the grids stored on RTGRIDS/GFS
> on ADDE.UCAR.EDU.  I was particularly interested in the GFS which is
> plotted on the CONUS 190.5 km grid (grid 202).  I think there may be an
> interopolation problem, as the data I contour is shifted to the south
> relative to output on the other grids available.  I've attached three gif
> files:
> 
> GFS201:  Mean sea level pressure on grid 201 (NH polar stereographic, grid 
> spacing 381 km)
> GFS202:  Mean sea level pressure on grid 202 (CONUS polar stereographic, grid 
> spacing 190.5 km)
> GFS213:  Mean sea level pressure on grid 213 (CONUS polar stereographic, grid 
> spacing 95.25 km)
> 
> As you can see, everything (see low over eastern US for example) on the
> 202 grid seems to be shifted to the south relative to the other grids.

Yes, I see what you mean.

> Thoughts?
Not right off.  I will do additional comparisons this weekend and take a hard 
look
at the XCD code that does the decoding if the other comparisons show similar
feature shifts.

Cheers,

Tom
****************************************************************************
Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
----------------------------------------------------------------------------
Unidata HomePage                       http://www.unidata.ucar.edu
****************************************************************************


Ticket Details
===================
Ticket ID: APD-338129
Department: Support McIDAS
Priority: Normal
Status: Open