[ncl-talk] modifying header info in a netcdf file

Manisha Ganeshan manisha.ganeshan86 at gmail.com
Fri Jun 7 08:57:03 MDT 2019


Here's the output from ncl_filedump.

Variable: f

Type: file

filename:       3B-DAY-L.MS.MRG.3IMERG.20190222-S000000-E235959.V05

path:   3B-DAY-L.MS.MRG.3IMERG.20190222-S000000-E235959.V05.nc4

attributes:

    BeginDate   :       2019-02-22

    BeginTime   :       00:00:00.000Z

    EndDate     :       2019-02-22

    EndTime     :       23:59:59.999Z

    FileHeader  :       StartGranuleDateTime=2019-02-22T00:00:00.000Z;

StopGranuleDateTime=2019-02-22T23:59:59.999Z

    InputPointer        :
3B-HHR-L.MS.MRG.3IMERG.20190222-S000000-E002959.0000.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S003000-E005959.0030.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S010000-E012959.0060.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S013000-E015959.0090.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S020000-E022959.0120.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S023000-E025959.0150.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S030000-E032959.0180.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S033000-E035959.0210.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S040000-E042959.0240.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S043000-E045959.0270.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S050000-E052959.0300.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S053000-E055959.0330.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S060000-E062959.0360.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S063000-E065959.0390.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S070000-E072959.0420.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S073000-E075959.0450.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S080000-E082959.0480.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S083000-E085959.0510.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S090000-E092959.0540.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S093000-E095959.0570.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S100000-E102959.0600.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S103000-E105959.0630.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S110000-E112959.0660.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S113000-E115959.0690.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S120000-E122959.0720.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S123000-E125959.0750.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S130000-E132959.0780.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S133000-E135959.0810.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S140000-E142959.0840.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S143000-E145959.0870.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S150000-E152959.0900.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S153000-E155959.0930.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S160000-E162959.0960.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S163000-E165959.0990.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S170000-E172959.1020.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S173000-E175959.1050.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S180000-E182959.1080.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S183000-E185959.1110.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S190000-E192959.1140.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S193000-E195959.1170.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S200000-E202959.1200.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S203000-E205959.1230.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S210000-E212959.1260.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S213000-E215959.1290.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S220000-E222959.1320.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S223000-E225959.1350.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S230000-E232959.1380.V05B.HDF5;3B-HHR-L.MS.MRG.3IMERG.20190222-S233000-E235959.1410.V05B.HDF5

    title       :       GPM Level 3 IMERG Late Daily 0.1 x 0.1 degree
Precipitation

    ProductionTime      :       2019-02-23T13:46:08.485Z


dimensions:

    lon = 3600

    lat = 1800


chunk dimensions:

    lon = 3600

    lat = 900


variables:

    precipitationCal: <float>   [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       mm

            long_name   :       Daily accumulated precipitation (combined
microwave-IR) estimate

            coordinates :       lat lon

            _FillValue  :       -9999.900391


    precipitationCal_cnt: <byte>        [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       count

            long_name   :       Count of valid half-hourly precipitationCal
retrievals for the day

            coordinates :       lat lon


HQprecipitation: <float>    [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       mm

            long_name   :       Daily accumulated High Quality
precipitation from all available MW sources

            coordinates :       lat lon

            _FillValue  :       -9999.900391


    HQprecipitation_cnt: <byte> [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       count

            long_name   :       Count of valid half-hourly HQprecipitation
retrievals for the day

            coordinates :       lat lon


    randomError: <float>        [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       mm

            long_name   :       Daily total error of precipitation estimate

            coordinates :       lat lon

            _FillValue  :       -9999.900391


    randomError_cnt: <byte>     [ 3600 <lon>, 1800 <lat> ]

        Chunking Info:  [ 3600 <lon>, 900 <lat> ]

        attributes:

            units       :       count

            long_name   :       Count of valid half-hourly randomError
retrievals for the day

            coordinates :       lat lon


    lon: <float>        [ 3600 <lon> ]

        attributes:

            units       :       degrees_east

            long_name   :       Longitude


    lat: <float>        [ 1800 <lat> ]

        attributes:

            units       :       degrees_north

            long_name   :       Latitude

On Fri, Jun 7, 2019 at 10:33 AM Manisha Ganeshan <
manisha.ganeshan86 at gmail.com> wrote:

> Hello,
>
> I have netcdf files with incomplete information in the header.
> It has latitude and longitude, but is missing the time dimension.
> I'm wondering if there's an quick way to modify just the header of a
> netcdf file to add *time = xxx *under dimensions?
> I don't want to modify anything else.
>
> Regards,
> Nisha
> --
> Dr. Manisha Ganeshan
> Universities Space Research Association
> Maryland, U.S.A.
>


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