[Qopen] Using Qopen for coda Q determination or coda normalization

[Petr Predein]

Hello Tom!
I’m very grateful to you for your response and for further developing
Qopen, it’s very helpful.
And I noticed that you updated Qopen package, as I can see there are some
changes in the imaging process, and also coda Q determination and coda
normalization added, isn’t it?
And I would like to test this features. So, I tried to update Qopen
package, and for coda normalization I see, the global change is that now
total spectral energy density is normalized by mean value of coda-window 20
length (from 180 to 200 seconds in your example, or am I misunderstood?).

But I get almost the same values for `g0` and `b` parameter but site
amplifications differs, compared to results with original options, for the
Tutorial dataset

So, could you please explain to me how to use Qopen to compare with coda
normalization.

Also, unfortunately coda Q determination (these 4 options) qopen fails with
error:
AttributeError: module 'qopen.rt' has no attribute 'G_diffapprox3d'

ps. I must say, also it’s my first experience to make CodaNorm package
using a similar method. That script was a bit trivial and only calculates
RMS amplitudes in fixed windows for bulk wave and for coda-wave (the
further calculations was not my task, however, but they showed a large
scatter of results depending on the geometric spreading value, for example).

Thanks in advance, cheers!

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