Reply to Charles Seman from S. De regarding bandpass Lanczos filter in wavenumber domain

[S.De]

Respected Charles Seman,
                        I have seen the IDL site of johnny-lin but the code of Lanczos
filter is written in frequency domain not in wavenumber domain and it is not as simple
as to replace the frequency with wavenumber and time period with wavelength in that
code.Thanking you and with regards,
S. De
**********************************
Saumyendu De
Theoretical Studies Division
Indian Institute of Tropical Meteorology
Dr. Homi Bhabha Road, NCL-Post
Pashan, Pune- 411 008
Maharastra, India
Phone:  +91 20 25893600/Extn. 275 (O)
Fax :   +91 20 25893825
e-mail : sde at tropmet.res.in
         sdey100 at yahoo.com
--
Open WebMail Project (http://openwebmail.org)


---------- Original Message -----------
From: Charles Seman <Charles.Seman at NOAA.GOV>
To: GRADSUSR at LIST.CINECA.IT
Sent: Tue, 14 Nov 2006 18:04:39 -0500
Subject: Re: bandpass Lanczos filter in wavenumber domain

> S. De,
>
> If you could work in IDL, here is a web site with an IDL Lanczos filter
> code:
> http://www.johnny-lin.com/idl_code/lanczos_bandpass.pro
>
> He says the routines are public:
> http://www.johnny-lin.com/lib.html
>
> I hope this helps,
> Chuck
>
> S.De wrote:
> > Dear All,
> >           Can anybody help how to get the bandpass Lanczos filter in wavenumber
domain
> > in GrADS. Thanks in advance.
> > S. De
> > ******************
> > Saumyendu De
> > Theoretical Studies Division
> > Indian Institute of Tropical Meteorology
> > Dr. Homi Bhabha Road; NCL Post,
> > Pashan; Pune - 411 008; India
> > Phone: 020-25893600/extn. 275 (O)
> > e-mail: sde at tropmet.res.in
> >         sdey100 at yahoo.com
> > Open WebMail Project (http://openwebmail.org)
> >
>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
>  Charles Seman                                Charles.Seman at noaa.gov
>  U.S. Department of Commerce / NOAA / OAR
>  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
>  201 Forrestal Road                              fax: (609) 987-5063
>  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not reflect
> any position of the Government or NOAA."
------- End of Original Message -------