John-
On 4/6/11 6:25 PM, John Caron wrote:
there are two issues going on:
1) we get constant, intermittent HTTP failures from nomads.ncep.noaa.gov
domain, in both the browser and TDS. I suspect their servers are
overwhelmed. Just retry.
There is something screwy with access to that particular dataset. Using
the 20110405 version seems better.
2) that dataset has an ensemble dimension that IDV/CDM doesnt recognize.
the main problem is that the CDM doesnt currently parse the "GRaDS"
conventions, which doesnt seem to be published. theres probably an NcML
workaround in case that helps.
There are two convention tags - COARDS and GrADS. I'm sure the latter
is to handle things like ensembles for which there is no CF convention.
Since the IDV/CDM handles non-ensemble grids using the same
conventions, it seems like some tweak is needed in the CDM to understand
that dimension (e.g. look for grads_dim as well as CF axis and/or look
for long_name = "ensemble_member").
That said, Kevin could use the IDV nightly build and get the GEFS
ensemble grids from the main IDV catalog. The latest build allows you
to select individual ensemble members thanks to Yuan and motherlode is
more reliable than NOMADS/GDS.
Don
On 4/6/2011 2:50 PM, Kevin R. Tyle wrote:
Hi all,
Any idea why IDV does not recognize GFS Ensemble files from
nomads.ncep.noaa.gov:9090/dods/gens as grid files?
For any of the catalog items listed when I browse this directory, I
get an error of the form (e.g. perturbation run # 20 from 12Z run today):
There was an error loading the data:
Error creating data source:dods.grid with:
http://nomads.ncep.noaa.gov:9090/dods/gens/gens20110406/gep20_12z
Grid data source failed making data set:
dods://nomads.ncep.noaa.gov:9090/dods/gens/gens20110406/gep20_12z
/gens/gens20110406/gep20_12z is not an available dataset
The specific exception is:
opendap.dap.DAP2Exception: /gens/gens20110406/gep_all_12z is not an
available dataset
Other models (e.g. GFS) load fine from this NOMADS server.
Thanks,
Kevin
______________________________________________________________________
Kevin Tyle, Systems Administrator **********************
Dept. of Atmospheric & Environmental Sciences ktyle@xxxxxxxxxxxxxxxx
University at Albany, ES-235 518-442-4578 (voice)
1400 Washington Avenue 518-442-5825 (fax)
Albany, NY 12222 **********************
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Don Murray
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303-497-3596
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