[gradsusr] "concatenating" and xdfopen

[Jennifer M Adams]

Jeff,
You can use ‘time’ for the <SDF_dimension_name> in your edef statement — it won’t really matter what name you use as long as the name matches one of the dimensions in the file and you provide all the remaining needed metadata for the ensemble axis: <size> names <list of names>.
—Jennifer


On Feb 29, 2016, at 2:07 PM, Jeff Duda <jeffduda319 at gmail.com<mailto:jeffduda319 at gmail.com>> wrote:

I have a set of radar reflectivity netcdf files from multiple NEXRAD sites and over multiple times. I wish to display the maximum reflectivity over a window of time and over all radar sites. Here is the control file I wrote:

dset /scratch/jdduda/%e_201006%ch_800_40.nc<http://ch_800_40.nc/>
options template
CHSUB 1 1 13_1800
CHSUB 2 2 13_1900
CHSUB 3 3 13_2000
CHSUB 4 4 13_2100
CHSUB 5 5 13_2200
CHSUB 6 6 13_2300
CHSUB 7 7 14_0000
xdef lon 800 linear -106.099096849811 0.015771162376
ydef lat 741 linear 31.231419002562 0.015771162376
tdef time 7 linear 18Z13JUN2010 1hr
edef 2 names KAMA KDDC
VARS 1
Reflectivity=>z
ENDVARS


Since the data files were created using the NCDC Weather Radar and Climate Toolkit, I'm using xdfopen to display the data. If I remove one of the dimensions (i.e., either time or radar site), then I can display a maximum (either across multiple sites at one time or across multiple times at one site) by using the time dimension as a dummy dimension. However, I see from the xdfopen documentation that the syntax above for EDEF isn't acceptable as it is for full blown data that you'd need a complete control file for. However, the data files themselves do not have an ensemble dimension, and therefore I don't know how to follow the indicated convention for the EDEF line:

edef <SDF_dimension_name>
edef <SDF_dimension_name> <size>
edef <SDF_dimension_name> <size> names <list of names>

Does anyone have any suggestions? I tried inserting an empty string (''), but that didn't work.

Jeff Duda
--
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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--
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
George Mason University



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