[ncl-talk] Joining files together with varying dimension sizes

[Andrew Kren - NOAA Affiliate]

Hi Guido,

I tried NCO, but it gave me this error, presumably because my time
coordinate is called "along_track" and not "time". Is there a workaround
for this?

On Tue, Apr 26, 2016 at 11:27 AM, Guido Cioni <guidocioni at gmail.com> wrote:

> Hi Andrew,
> I would suggest you to merge data together BEFORE reading them into NCL.
> You can easily do that either with NCO and the command ncrcat (see here
> http://research.jisao.washington.edu/data_sets/nco/#example8) or using
> CDO with the merge option (see here for the complete guide
> https://www.rsmas.miami.edu/users/rajib/cdo.pdf). These methods will work
> *without* problems as long as you have a well-defined time coordinate in
> your files and the vertical levels are always the same.
> Cheers
>
> Guido Cioni
> http://guidocioni.altervista.org
>
>
>
>
> Il giorno 26 apr 2016, alle ore 19:22, Andrew Kren - NOAA Affiliate <
> andrew.kren at noaa.gov> ha scritto:
>
> Dear NCL Talk,
>
> I have data that is netcdf format of various aircraft microwave
> retrievals. These retrievals of temperature, moisture, etc, are in units of
> (lev,time) in each file. I want to join all of the files together so that I
> can compare the data to dropsondes. However, when I do the addfiles
> feature, and grab the data using temp_hamsr = factor*(short2flt(q[:]->ham_airT))-273.15,
> it gives me this error:
>
> warning:File
> /scratch4/BMC/shout/Andrew.Kren/hamsr_data/2011/HS3/L2/HAMSR_L2_20110908T185915_20110909T185423_v01.nc
> dimension sizes do not conform to others in list; skipping file
> warning:A valid instance of variable ham_airT was not found in one or more
> elements of the file list
>
> I know what this error means after looking it up online and on the NCL
> help page. It is because my leftmost dimension is not time (level instead),
> which is required to merge them together. Is there any workaround to do
> this, like reorder when reading in, with what format my data is in?
> Basically I want to make my code portable so I can join any number of files
> for a particular storm case, since not all cases have the same amount of
> time retrievals.
>
> I also attached an ncl_filedump output of the format of the data I am
> reading. The along track metadata refers to time dimension in this case.
>
> Thanks,
>
> --
> Andrew Kren, PhD
> Research Scientist I, Global Observing Systems Analysis (GOSA) Group
> NOAA ESRL Global Systems Division (Rm 3C515)
> 325 Broadway, Boulder, CO 80305
> (303) 497-5418
> <format_file.txt><compare_AVAPS_HAMSR_HS3_2011.ncl>
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-- 
Andrew Kren, PhD
Research Scientist I, Global Observing Systems Analysis (GOSA) Group
NOAA ESRL Global Systems Division (Rm 3C515)
325 Broadway, Boulder, CO 80305
(303) 497-5418
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