[ncl-talk] cloudsat data
Anusha sathyanadh
anushacalicut at gmail.com
Fri Dec 12 23:03:41 MST 2014
Thank u very much for adding two more programs to the NCL cloudsat page..
Actually, i have seen this long back and plotted too..
my problem is not any of this..
I want to know about the cloud classification algorithm and how to execute
it..
In short how to plot different clouds using cloud scenario values..
the IDL program in this link
http://www.cloudsat.cira.colostate.edu/code_library/cldclass_png.pro gives
different clouds ..
sorry to disturb you again and again..
thanks a lot for ur support
On Sat, Dec 13, 2014 at 2:43 AM, Dennis Shea <shea at ucar.edu> wrote:
>
> 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*
>>
>
--
*ANUSHA SATHYANADHSenior Research FellowDeparment of Atmospheric and Space
SciencesPune university*
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