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20001110: pqact line to get AVN model data for N. America

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  • Subject: 20001110: pqact line to get AVN model data for N. America
  • Date: Fri, 10 Nov 2000 15:22:01 -0700
Teresa,

The lines you show look like pieces from the GEMPAK www pages.
The www page I have at: 
http://www.unidata.ucar.edu/packages/gempak/tutorial/pqact/decoders.tbl

Shows:
# AVN model output 
# Grid #201 N. Hemisphere 381km: ^Y.A... KWBC.*(/mAVN|/mSSIAVN)
# Grid #202 CONUS         190km: ^Y.I... KWBC.*(/mAVN|/mSSIAVN)
# Grid #203 Alaska        190km: ^Y.J... KWBC.*(/mAVN|/mSSIAVN)
# Grid #211 CONUS          80km: ^Y.Q... KWBC.*(/mAVN|/mSSIAVN)
# Grid #213 CONUS          95km: ^Y.H... KWBC.*(/mAVN|/mSSIAVN)
# Select any/all grids desired from [QAIJH]
HRS    ^[YZ].[QAIJH]... KWB. ([0-3][0-9])([0-2][0-9]).*(/mAVN|/mSSIAVN)

The other Global 1.25x1.25 degree AVN (thinned grids) are:

# Global AVN (Spectral) Thinned grids
# Grid octets I-P will be stitched togethir as a single global grid
#
HRS    ^H.[I-P]... KWB. ([0-3][0-9])([0-2][0-9]).*


From the above, if you wanted a data set that covers N. America, your choices
would be either Grid #201 or the global thinned grids.

A pattern for grid #201 is:
HRS    ^[YZ].[A]... KWB. ([0-3][0-9])([0-2][0-9]).*(/mAVN|/mSSIAVN)

The "A" in the third character position identifies grid #201.

All of the above are GRIB data sets, so if you are already processing
either of the above to NetCDF (typically with gribtonc from the
ftp://ftp.unidata.ucar.edu/pub/decoders/decoders.tar.Z distribution),
then you would have the data set you need.


Steve Chiswell
Unidata User Support


  
>From: Teresa Van Hove <address@hidden>
>Organization: GST
>Keywords: 200011102110.eAALAcD13996

>
>Hi,
>
>I need to start getting AVN model data for Continental U.S. + Alaska or N.
>America.
>I did a quick search on AVN in your support archives and got:
>
># Grid #202 CONUS         190km: ^Y.I... KWBC.*(/mAVN|/mSSIAVN)
># Grid #203 Alaska        190km: ^Y.J... KWBC.*(/mAVN|/mSSIAVN)
># Grid #201 N. Hemisphere 381km: ^Y.A... KWBC.*(/mAVN|/mSSIAVN)
>#NMC2    avn/avn.(......)/gblav.T(..)Z
>
>I still don't know how to put this together to get what I want. 
>Also who should I use as the source?  
>Would I use just 
>NMC2   ^Y.I... KWBC.*(/mAVN|/mSSIAVN) 
>FILE   data/ 
>
>Doug Hunt in my group has some decoding stuff to go to netcdf 
>from the grib files - or do I already have a decoder in my
>ldm area?
>
>Thanks,
>Teresa
>