Re: [ferret_users] Reading NPP h5 files

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Peng,
This is really a question for the NetCDF developers at Unidata. We are currently testing with the latest NetCDF beta release and the ncdump program from that release returns the same error message that you see, trying to look at test.h5.  Searching at the Unidata pages, http://www.unidata.ucar.edu/software/netcdf/, it seems that there is work going on to handle NPP satellite files in NetCDF.

If and when NetCDF can access these files, then Ferret will be able to do something with them. (How well Ferret handles these files of course will also depend on what the grids in these datasets are like.)

Ansley

On 1/18/2011 7:57 AM, Ge.Peng@xxxxxxxx wrote:
> Hi,
>
> I got an error message (see below) when trying to load NPP h5 files (see
> attached test.h5) in ferret while it works fine reading the h5 file as
> shown in Ansley's e-mail sometime ago.
>
> Using hdfview, one can see that the NPP h5 file has more than one layer:
>
> test.h5:
>   |-All_Data
>     |- CrIMSS-CRIS-AVMP-IP_ALL
>          |-MoistProfile  (-->  data)
>
>   |-Data_Products
>     |- CrIMSS-CRIS-AVMP-IP
>        |- CrIMSS-CRIS-AVMP-IP_Aggr
>        |- CrIMSS-CRIS-AVMP-IP_Gran_0
>
> (Data_Products portion contains object reference to the data in the
> ALL_Data portion)
>
> while there is no layer in the h5 file for the Ansley's example:
> h5ex_d_compact.h5:
>   |-DS1 (-->  data)
>
>
> Is there anyway that the current ferret could load NPP h5 files?
>
> Thanks,
>
> --- Peng
>
>
> ----------------------------
> $ ferret
>          NOAA/PMEL TMAP
>          FERRET v6.65
>          Linux(gfortran) 2.6.9-89.0.20.ELsmp - 11/30/10
>          18-Jan-11 08:57
>
> yes? use test.h5
>   **netCDF error
>               Bad type ID (OPeNDAP/netCDF Error code -117)
>               Data set: ./test.h5
>
> -----
> The netCDF version:
> NETCDF_VERSION = "4.1.1 of Sep 16 2010 09:59:23 $"
>
> and no errors in reading h5 shown in Ansley's example:
>
> yes? use h5ex_d_compact.h5
> yes? sho data
>       currently SET data sets:
>      1>  ./h5ex_d_compact.h5  (default)
>   name     title                             I         J         K         L
>   DS1                                       1:7       1:4       ...       ...
>
> yes? list ds1
>               VARIABLE : DS1
>               FILENAME : h5ex_d_compact.h5
>               SUBSET   : 7 by 4 points (X-Y)
>               1      2      3      4      5      6      7
>               1      2      3      4      5      6      7
>   1   / 1:   0.00  -1.00  -2.00  -3.00  -4.00  -5.00  -6.00
>   2   / 2:   0.00   0.00   0.00   0.00   0.00   0.00   0.00
>   3   / 3:   0.00   1.00   2.00   3.00   4.00   5.00   6.00
>   4   / 4:   0.00   2.00   4.00   6.00   8.00  10.00  12.00