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Re: Extended GFS 0.5 degree data

Jerry,

The NWS servers are still affected by the moratorium to some degree,
which is one reason we have pursued the feed avenue from NCEP/WOC
(and the file name changes). 

I have not scheduled removal time of the 1 degree grids at this time
and I agree that something on the order of 30-60 days notice
would be required. I have the capability at the source now to up the
data from 2GB per hour to 5GB per hour, but that would likely cause
most sites significant problems with queue size (let alone decoding
resources), so I am trying to balance added data with bandwith.
If most users can spare the bandwidth of duplicate GFS data, then
we will go ahead with other additions such as the 13km RUC, but
if that added volume can't be handled- then we will have to ask users to
prioritize options for moving forward. The NWS has announced a 180 day
notice on removal of GRIB1 products, so that will be the eventual
factor.

Steve Chiswell
Unidata User Support



On Tue, 2006-06-13 at 08:16, Jerrold Robaidek wrote:
> Hi Steve,
> 
> 
> Do you have a timetable for when the 1 degree will be removed?   I gave 
> notice to my users back in 
> January and February, but we haven't really followed the schedule from the 
> January information.  At 
> that time, I think it was said that the 1 degree would go away 30 days after 
> the moratorium has been 
> lifted.  
> http://www.unidata.ucar.edu/projects/CONDUIT/CONDUIT_development_plans.html I 
> haven't 
> received any information about the moratorium being lifted, so I was wonder 
> what date I can give my 
> users.  60 days would be nice, although they have had the .5 degree available 
> via CONDUIT for a 
> while, some were still having some issues.
> 
> Thanks much.
> 
> Jerry
> 
> 
> Steve Chiswell wrote:
> > CONDUIT data users,
> > 
> > We would like to increase the 0.5 degree (grid #4) GFS availability to
> > the CONDUIT data stream as discussed at the working group meeting in
> > January:
> > http://www.unidata.ucar.edu/projects/CONDUIT/Unidata_CONDUIT_Status_and_Implementation_Update.pdf
> > 
> > Currently, the CONDUIT feed provides F000 through F084 fields for the
> > GFS at the half degree resolution in GRIB2 format. We now have access to
> > the grids through F180 (an additional 1.2GB of data per model cycle)
> > and plan to add this to the data stream.
> > 
> > The addition of these files will involve a change in source file names
> > of the existing and additional data files from the NWS ftp server file
> > naming convention: 
> > ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnt/MT.gfs_CY.HH/RD.YYYYMMDD/PT.grid_DF.gr2/fh.FFFF_tl.press_gr.0p5deg
> > to the NCEP ftp server naming convention:
> > ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.YYYYMMDD/gfs.tHHz.pgrb2fFFF
> > 
> > If you are currently using the 0.5 degree GFS products and the change of
> > file naming would cause problems for your use of the data, please
> > contact address@hidden as soon as possible.
> > Eventually, we would like to remove the legacy 1.0 degree GRIB1 format
> > (grid #3) products currently being sent in CONDUIT for the same
> > F000-F180 time period to allow for additional new data sets. We
> > encourage all users to transition to GRIB2 along with the NWS
> > announced changes so that new data sets can be utilized to their
> > fullest extent.
> > 
> > Steve Chiswell
> > Unidata User Support
> > 
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