[ncl-talk] Fourier decomposition

[Dennis Shea]

[1] Spherical harmonic analysis
     Gaussian grid: (*shagC
<https://www.ncl.ucar.edu/Document/Functions/Built-in/shagC-1.shtml>)* and
synthesis (*shsgC*
<https://www.ncl.ucar.edu/Document/Functions/Built-in/shsgC-1.shtml>)
     Equally spaced grid: (*shaeC)*
<https://www.ncl.ucar.edu/Document/Functions/Built-in/shseC-1.shtml> and
synthesis (*shseC*
<https://www.ncl.ucar.edu/Document/Functions/Built-in/shseC-1.shtml>)

[2]  *ezfftf
<https://www.ncl.ucar.edu/Document/Functions/Built-in/ezfftf.shtml>*and
*ezfftb* <https://www.ncl.ucar.edu/Document/Functions/Built-in/ezfftb.shtml>
================================
Also:* fourier_info*
<https://www.ncl.ucar.edu/Document/Functions/Built-in/fourier_info.shtml>
may be of interest

See attached

Thae data file is distributed with NCL
https://www.ncl.ucar.edu/Applications/Data/

On Fri, Feb 28, 2020 at 2:07 AM Md. Jalal Uddin via ncl-talk <
ncl-talk at ucar.edu> wrote:

> I think the following link would help you.
>
> https://www.ncl.ucar.edu/Document/Functions/Built-in/ezfftb.shtml
>
> ——
> Jalal
>
>
> ৯:৪৯ AM এ শুক্র, ২৮ ফেব, ২০২০ এ Lyndz via ncl-talk <ncl-talk at ucar.edu>
> লিখেছেন:
>
>> Dear NCL-experts,
>>
>> I am wondering if there is an example application of Fourier
>> decomposition in NCL.
>>
>> I would like to apply this on the stream function (netcdf) and extract
>> the waves 0-1(base flow) and waves 2-23.
>>
>> I'll appreciate any suggestions on how I can do this in NCL.
>>
>> Sincerely,
>> Lyndz
>> _______________________________________________
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>
> --
> *Md. Jalal Uddin*
> M.Sc. in Applied Meteorology
> Nanjing University of Information, Science and Technology, China.
> B.Sc. in Disaster Management (Hons.)
> Patuakhali Science and Technology University, Bangladesh.
> Cell: +8613260859092, +8801792052662
> Web: www.dmjalal90.weebly.com
> Researchgate: https://www.researchgate.net/profile/Md_Uddin125
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