[ncl-talk] TIMED/SABER NASA Data

Verena Lili verena.prick at gmail.com
Mon Dec 15 14:30:52 MST 2014


Dear NCL,
HI Dennis

Yes, thanks for the tips, Anyway, Im still wondering is there any way to
convert the data into standard grid (latlon), from
events to daily mean or monthly mean?

I found the driver subroutine that they provieded here
ftp://laspftp.colorado.edu/pub/see/software/idl/netCDF/read_netcdf.pro
but it's not clear for me as they written it in idl format.

Thanks for any hints.

On Fri, Dec 12, 2014 at 9:52 PM, Dennis Shea <shea at ucar.edu> wrote:
>
> Further, I know that you will always follow the ncl-talk mantra of "Look
> at your data", you will note that
>
>      time:
>
>      86535854     86535899     86535943     86535988     86536032
> 86536077
>      86536121     86536166     86536210     86536254     86536298
> 86536342
> [snip]
>      86552061     86552107     86552152     86552197     86552243
> 86552289
>      86552337     86552386     86552434     86552481     86552535
> 86552606
>      86552682     86552733  -2147483647     86590169     86590125
> 86590081
>      86590036     86589992     86589947     86589903     86589858
> 86589814
> [SNIP]
>
> has missing values [ -2147483647    ]
>
> These are not identified as such on the netCDF file.  Not good netCDF
> practice.
> Hence, you will have to add and set the _FillValue attribute.
>
> Good luck
>
>
>
> On Fri, Dec 12, 2014 at 1:44 PM, Dennis Shea <shea at ucar.edu> wrote:
>>
>> Looking at the global attributes, this is Level 2 data (likely SWATH)
>> that has been converted
>> from HDF to netCDF. The SABER dimensions are:
>>
>>  dimensions:
>>       altitude = 370
>>       vector = 3
>>       event = 32577
>>
>> ===
>> By analogy, you could possibly use Examples 2 & 3 at
>>       http://www.ncl.ucar.edu/Applications/cloudsat.shtml
>>
>> That HDF-EOS file has
>>
>>    dimensions:
>>       nray_2B_CLDCLASS = 37082
>>       scalar_2B_CLDCLASS = 1
>>       nbin_2B_CLDCLASS = 125
>>
>> I do not know what the 'vector' dimension is but I would speculate that
>>
>> SABER            CLOUDSAT
>> altitude             nbin_2B_CLDCLASS
>> event                nray_2B_CLDCLASS
>>
>> ========
>> Unlike the CLOUDSAT which has 1D time and must be conformed to 2D,
>> the SABER file looks like that has been done!
>>
>> EASY!
>>
>> Once you have completed a nice example, please contribute to NCL.
>> It can be included on NCL's Application page ... with attribution, of
>> course.
>>
>> Cheers
>>
>>
>>
>>
>>
>>
>> On Thu, Dec 11, 2014 at 2:03 PM, Verena Lili <verena.prick at gmail.com>
>> wrote:
>>
>>> Dear NCL,
>>>
>>> I'd like to extract the kinetic temperature variable for each netcdf
>>> file provided by TIMED/SABER team. Unfortunately, they only have an IDL
>>> converter tool (subroutine) to regrid the netcdf output into the standard
>>> grid and height (km), So,, is there any solution to convert these data
>>> using ncl?
>>>
>>> Thank you.
>>>
>>> ===
>>>
>>> The example data is here:
>>>
>>> ftp://saber.gats-inc.com/custom/Temp_O3/v1.07/SABER_Temp_O3_April2002_v1.07.nc
>>>
>>> =====
>>>
>>>
>>> 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: SABER_Temp_O3_April2003_v1.07
>>> path: SABER_Temp_O3_April2003_v1.07.nc
>>>    file global attributes:
>>>       Title : SABER Custom Level2A Product!
>>>       Data_Product_Type : Processed Level2A
>>>       Mission : TIMED
>>>       Software_Name : ./Level2a
>>>       Software_Version : 01.07
>>>       Calibration_Version : 01.07
>>>       Product_Format_Version : 003
>>>       Data_Product_Version : 01.07
>>>    dimensions:
>>>       altitude = 370
>>>       vector = 3
>>>       event = 32577
>>>    variables:
>>>       integer orbit ( event )
>>>
>>>       integer date ( event )
>>>          long_name : Date [yyyyddd]
>>>          units : yyyyddd
>>>
>>>       integer time ( event, altitude )
>>>          long_name : Msec Since Midnight
>>>          units : msec
>>>
>>>       float tpaltitude ( event, altitude )
>>>          long_name : Tangent-Point Altitude
>>>          units : km
>>>
>>>       float tplatitude ( event, altitude )
>>>          long_name : Tangent-Point Latitude
>>>          units : degrees
>>>
>>>       float tplongitude ( event, altitude )
>>>          long_name : Tangent-Point Longitude
>>>          units : degrees
>>>
>>>       float tpgpaltitude ( event, altitude )
>>>          long_name : Tangent-Point Geopotential Altitude
>>>          units : km
>>>
>>>       float tpSolarLT ( event, altitude )
>>>          long_name : Tangent-Point Local-Solar Time
>>>          units : msec
>>>
>>>       float tpSolarZen ( event, altitude )
>>>          long_name : Tangent-Point Solar-Zenith Angle
>>>          units : degrees
>>>
>>>       float pressure ( event, altitude )
>>>          long_name : Pressure
>>>          units : mbar
>>>
>>>       float density ( event, altitude )
>>>          long_name : Atmospheric Density
>>>          units : 1/cm^3
>>>
>>>   *    float ktemp ( event, altitude )*
>>> *         long_name : Kinetic Temperature*
>>> *         units : K*
>>>
>>>       float O3_96 ( event, altitude )
>>>          long_name : O3 Mixing Ratio 9.6um
>>>          units : unitless
>>>
>>>       float O3_127 ( event, altitude )
>>>          long_name : O3 Mixing Ratio 1.27um Channel
>>>          units : unitless
>>>
>>>
>>> --
>>> Regards,
>>> Dr. Verena.
>>> School of Marine and Atmospheric Sciences
>>> Stony Brook University
>>> homepage: http://www.somas.stonybrook.edu/
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>
>>>

-- 
Regards,
Dr. Verena.
School of Marine and Atmospheric Sciences
Stony Brook University
homepage: http://www.somas.stonybrook.edu/
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