[gradsusr] .he5 format descriptor file

[Jennifer Adams]

Hi, Jonathan --
GrADS should be able to read your .he5 file if it contains gridded  
data. The file naming convention is unconventional, and it is not  
immediately apparent to me what the two date strings mean. Your best  
bet may be to use chsub to map complete filenames to the time steps  
they contain, something like :

dset /Users/jonathanwsmith/DATA/OMI_DOMINO_NO2/FIRST_LEG/%ch
chsub 1 XX OMI-Aura_L2-OMDOMINO_2006m0522t0926- 
o09846_v003-2010m1007t075325.he5

...where XX is the number of time steps in your file.

The smallest time increment GrADS will handle is minutes, so a TDEF  
for this file might be:
tdef XX linear 09:26z22may2006 1mn

... assuming that "2006m0522t0926" represents the initial time in the  
file. It's difficult to help any further without knowing more about  
what's in your file and what the naming convention means.
--Jennifer


On Oct 3, 2011, at 5:20 PM, SMITH, JONATHAN WYNN. (GSFC-6140) wrote:

> Hello:
>
> I was attempting to set up a descriptor file for following he5 file:
>
> OMI-Aura_L2-OMDOMINO_2006m0522t0926-o09846_v003-2010m1007t075325.he5
> ______________________________________________________________________________
> Here is the descriptor file I’ve started:
>
> dset /Users/jonathanwsmith/DATA/OMI_DOMINO_NO2/FIRST_LEG/OMI-Aura_L2- 
> OMDOMINO_%y4m%m2%d2t%h2%n2-o10074_v003-%y4m%m2%d2t%h2%n256.he5
>
> chsub
>
> options template
>
> title OMIDOMINO
>
> undef -9999
>
> dtype hdf5_grid
>
> xdef 360 linear -180 1
>
> ydef 180 linear -90 1
>
> zdef 1 linear 1 1
>
> tdef 3 LINEAR 07JUN2006 1dy
>
> vars 2
> Tropospheric~Vertical~Column=>tvono2 0 y,x  
> Tropospheric_Vertical_Column
>
> Averaging~Kernal=>avgk 0 y,x Averaging_Kernal
>
> endvars
>
> From this I am wondering what dset template would represent the  
> 10074.  There is also no template for seconds ( the 2 numbers before  
> the .he5)
>
> Do I need the chsub?
>
> Will grads work with .he5 files?
>
> Thanks
> Jonathan Wynn Smith
> Student Trainee
> jonathan.smith at nasa.gov
> NASA-Goddard Space Flight Center
> Code 613.3-Atmospheric Chemistry and Dynamics Branch
> Greenbelt, MD 20771
> 301-614-5956
>
> Doctoral Candidate
> jonathan.smith at bison.howard.edu
> Howard University Program in Atmospheric Sciences
> 2355 6th St NW/408 Thirkield Bldg.
> Washington, DC 20059
>
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> gradsusr at gradsusr.org
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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