[ncl-talk] cloudsat data
Dennis Shea
shea at ucar.edu
Fri Dec 12 14:13:03 MST 2014
See Examples 2 & 3 at
http://www.ncl.ucar.edu/Applications/cloudsat.shtml
On Thu, Dec 11, 2014 at 2:57 AM, Anusha sathyanadh <anushacalicut at gmail.com>
wrote:
>
> Thank u very much..
>
> I will take care of the suggestions next time onwards..
>
> On Thu, Dec 11, 2014 at 5:09 AM, Dennis Shea <shea at ucar.edu> wrote:
>
>>
>> Please do not send direct emails to me. Only ncl-talk. The group is cc'd
>> here.
>>
>> ncl-talk expects people to put in the time to learn the language.
>> ncl-talk can not do programing for you.
>> ====
>>
>> There are two excellent tutorials at:
>> http://www.ncl.ucar.edu/Document/Manuals/
>> Please look at the two DKRZ tutorials.
>>
>> ========
>> As noted on ncl-talk many times, the key to data processing is *KNOW YOUR
>> DATA*
>>
>> Please read the description of the 'ncl_filedump' command line operator.
>> This provides an overview of a file's contents.
>>
>> http://www.ncl.ucar.edu/Document/Tools/ncl_filedump.shtml
>>
>> ========
>>
>> %> ncl_filedump 2010153190053_21792_CS_2B-
>> CLDCLASS_GRANULE_P_R04_E03.hdf
>>
>> Copyright (C) 1995-2014 - All Rights Reserved
>> University Corporation for Atmospheric Research
>> NCAR Command Language Version 6.2.0
>> The use of this software is governed by a License Agreement.
>> See http://www.ncl.ucar.edu/ for more details.
>>
>> Variable: f
>> Type: file
>> filename: 2010153190053_21792_CS_2B-CLDCLASS_GRANULE_P_R04_E03
>> path: 2010153190053_21792_CS_2B-CLDCLASS_GRANULE_P_R04_E03.hdf
>> file global attributes:
>> HDFEOSVersion : HDFEOS_V2.5 <=*=*=*=*=*=*=*=*=
>> StructMetadata_0 : GROUP=SwathStructure <=*=*=*=*=*=*=*=*=
>> GROUP=SWATH_1
>> SwathName="2B-CLDCLASS"
>> GROUP=Dimension
>> OBJECT=Dimension_1
>> DimensionName="nray"
>> Size=37082
>> END_OBJECT=Dimension_1
>> OBJECT=Dimension_2
>> DimensionName="scalar"
>> Size=1
>> END_OBJECT=Dimension_2
>> OBJECT=Dimension_3
>> DimensionName="nbin"
>> Size=125
>> END_OBJECT=Dimension_3
>> END_GROUP=Dimension
>>
>> [SNIP ...]
>> ++++++++++++++++++++
>>
>> Comment: This is a HDF-EOS file with a SWATH structure.
>> Unfortunately HDFEOS is a separate format from classic HDF.
>> In practice, a 2nd read must be implemented. NCL does this by
>> appending a .he2 (or .hdfeos) suffix to the file name when reading the
>> file. NCL merges
>> the information from both reads. The hdf-eos part usually have latitude
>> and longitude.
>>
>>
>> %> ncl_filedump
>> 2010153190053_21792_CS_2B-CLDCLASS_GRANULE_P_R04_E03.hdf.he2
>>
>> Copyright (C) 1995-2014 - All Rights Reserved
>> University Corporation for Atmospheric Research
>> NCAR Command Language Version 6.2.0
>> The use of this software is governed by a License Agreement.
>> See http://www.ncl.ucar.edu/ for more details.
>>
>> Variable: f
>> Type: file
>> filename: 2010153190053_21792_CS_2B-CLDCLASS_GRANULE_P_R04_E03.hdf
>> path: 2010153190053_21792_CS_2B-CLDCLASS_GRANULE_P_R04_E03.hdf
>> file global attributes:
>>
>> [SNIP ... you can ignore these here]
>>
>> dimensions:
>> nray_2B_CLDCLASS = 37082
>> scalar_2B_CLDCLASS = 1
>> nbin_2B_CLDCLASS = 125
>> variables:
>> short cloud_scenario_2B_CLDCLASS ( nray_2B_CLDCLASS,
>> nbin_2B_CLDCLASS )
>> hdfeos_name : cloud_scenario
>> valid_range : ( 0, 32767 )
>> units : none
>> long_name : Cloud scenario
>> offset : 0
>> factor : 1
>> [SNIP]
>> short Height_2B_CLDCLASS ( nray_2B_CLDCLASS, nbin_2B_CLDCLASS )
>> hdfeos_name : Height
>> _FillValue : -9999
>>
>> float Longitude_2B_CLDCLASS ( nray_2B_CLDCLASS )
>> long_name : longitude
>> units : degrees_east
>> hdfeos_name : Longitude
>>
>> float Latitude_2B_CLDCLASS ( nray_2B_CLDCLASS )
>> long_name : latitude
>> units : degrees_north
>> hdfeos_name : Latitude
>>
>> float Profile_time_2B_CLDCLASS ( nray_2B_CLDCLASS )
>> hdfeos_name : Profile_time
>>
>>
>> =========
>> After looking at your file, it is *NOT* a latitude-longitude grid.
>> It is a satellite swath (time, location, height_profile)
>>
>>
>> Good luck
>>
>>
>>
>>
>>
>> On Wed, Dec 3, 2014 at 11:29 PM, Anusha sathyanadh <
>> anushacalicut at gmail.com> wrote:
>>
>>> Dear Sir,
>>>
>>> I wish to know how to plot lat-lon contour maps like those shown here
>>> https://www.ncl.ucar.edu/Applications/cloudsat.shtml, over Indian
>>> region by using 2B-CLDCLASS data..Am attaching one of the data file along
>>> with ..
>>>
>>> On Wed, Dec 3, 2014 at 11:40 AM, Dennis Shea <shea at ucar.edu> wrote:
>>>
>>>> ncl-talk does not have any of these files readily available.
>>>>
>>>> wrt: 'how to plot lat-lon map using the data when the data is not on
>>>> regular grids and is not a function of lat and lon separately'
>>>> This is not clear ... ?lat and lon separately?
>>>>
>>>> The http://www.ncl.ucar.edu/Applications/Scripts/cloudsat_1.ncl
>>>> example file had the lat and lon as part of the file.
>>>>
>>>> NCL can plt 'anything' if the lat/lon data are available.
>>>> egL satellite swath data:
>>>> http://www.ncl.ucar.edu/Applications/HDF.shtml
>>>>
>>>> More cloudsat info is at:
>>>>
>>>>
>>>> http://www.cloudsat.cira.colostate.edu/dataICDlist.php?go=list&path=/2B-CLDCLASS
>>>>
>>>> Good luck
>>>>
>>>> On Tue, Dec 2, 2014 at 10:29 PM, Anusha sathyanadh <
>>>> anushacalicut at gmail.com> wrote:
>>>>
>>>>> Dear NCL users,
>>>>>
>>>>> I have a doubt concerning how to to use cloudsat 2B-CLDCLASS data for
>>>>> vertical and horizontal classification of clouds. the product gives
>>>>> cloud_scenario and height with dimension of (nbin,nray). I have gone
>>>>> through the ncl talks regarding this and tried the instructions listed. I
>>>>> could plot the satellite path and height from the data. but I wish to know
>>>>> how to plot lat-lon map using the data when the data is not on regular
>>>>> grids and is not a function of lat and lon separately...
>>>>> cloud reflectivity lat lon map is plotted in this program
>>>>> https://www.ncl.ucar.edu/Applications/Scripts/cloudsat_1.ncl..is it
>>>>> possible for cloud scenario??
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> waiting for your suggestions..
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and
>>>>> Space SciencesPune university*
>>>>>
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
>>>>> List instructions, subscriber options, unsubscribe:
>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> *ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and
>>> Space SciencesPune university*
>>>
>>
>>
>
>
> --
>
>
>
>
> *ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and Space
> SciencesPune university*
>
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