[ncl-talk] the envelope function in bw_bandpass_filter

[Dennis Shea]

Hi Arnold,

I'll send you the butterworth filter fortran code later today.

D

On Wed, Mar 16, 2016 at 12:00 AM, <Arnold.Sullivan at csiro.au> wrote:

> Hi there,
>
>
>
> Just found that we can get the top envelope function from
> bw_bandpass_filter, however how was it calculated? Can we get the bottom
> envelope function as well??
>
>
>
> So that we can create this kind of plot:
>
>
>
>
> http://www.mdpi.com/remotesensing/remotesensing-07-15583/article_deploy/html/images/remotesensing-07-15583-g002.png
>
>
>
>
>
> At the end, of course, we then can do the EEMD by using NCL, which is my
> main purpose.
>
>
>
> Regards,
>
>
>
> Arnold
>
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