[ncl-talk] help reading hdf file

[Manisha Ganeshan]

Thanks! I did read the file using ncl_filedump, but didn't think the file
type was relevant.
Anyway, thanks for resolving my query. I appreciate your help.

Regards,
Nisha

On Wed, Sep 18, 2019 at 4:57 PM Dennis Shea <shea at ucar.edu> wrote:

> This type of question has been asked numerous time on ncl-talk. These *CloudSat
> *files are *HDF-EOS*. The golden rule of data processing is "Look at the
> data!"
>
>
> %>* ncl_filedump*
> <https://www.ncl.ucar.edu/Document/Tools/ncl_filedump.shtml>
> 2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf
>
> Variable: f
> Type: file
> filename:       2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03
> path:   2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf
>    file global attributes:
>       *HDFEOSVersion : HDFEOS_V2.5*
>  ---------
>
> As noted in previous ncl-talk responses, append .*he2  *
>
> *%> ncl_filedump
> <https://www.ncl.ucar.edu/Document/Tools/ncl_filedump.shtml> *
> 2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf*.he2*
>
> The .he2 extension tell NCL to use HDFEOS software to provide value-added
> information.
>
> The .he2  flattens the file. It makes it look like a standard netCDF file.
> It appends a name extension for assorted reasons.
>
> %>* ncl_filedump*
> <https://www.ncl.ucar.edu/Document/Tools/ncl_filedump.shtml>
> 2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf
>
> The variables will have a 2B_FLXHR_LIDAR appended
>
> f = addfile("2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf
> *.he2"*,"r")
>
> height = f->Height_2B_FLXHR_LIDAR
> lon     = f->Longitude_2B_FLXHR_LIDAR
> FD_NA = f->FD_NA_2B_FLXHR_LIDAR
> FD = FD_2B_FLXHR_LIDAR
>
>
>
> On Wed, Sep 18, 2019 at 12:53 PM Manisha Ganeshan via ncl-talk <
> ncl-talk at ucar.edu> wrote:
>
>> Hello,
>>
>> I'm trying to read the attached hdf file using the addfile function.
>> I'm able to read the variables (Height, FD, FD_NC, and so on) directly
>> from the file, but I also need to read the 11 GeoFields and 39 DataFields
>> listed under groups. Any thoughts on how I can read these fields?
>>
>> I've tried the following, that doesn't seem to work.
>>
>> g = f=>GeoField
>>
>> When I type printVarSummary(g), I get the following output indicating
>> that no variables are read.
>>
>> Variable: g
>>
>> Type: file
>>
>> File path:
>> /data10/mganesha/CloudSat/2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P2_R04_E03.hdf
>>
>> Number of global attributes: 2
>>
>> Number of dimensions: 7
>>
>> Number of variables: 0
>>
>> Could you advice on how to proceed?
>>
>> Thanks,
>> Nisha
>>  2010024150054_19911_CS_2B-FLXHR-LIDAR_GRANULE_P...
>> <https://drive.google.com/file/d/12rdpMVRppvIlgb3zSBOmAS0nmi78C83X/view?usp=drive_web>
>>
>>
>> --
>> Dr. Manisha Ganeshan
>> Universities Space Research Association
>> Maryland, U.S.A.
>> _______________________________________________
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>> ncl-talk at ucar.edu
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>
>

-- 
Dr. Manisha Ganeshan
Universities Space Research Association
Maryland, U.S.A.
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