linear fk window not visible

gdg · Post by **gdg** » Mon May 12, 2008 12:57 pm

After several usage of linear fk on a windows machine, I am not more able to see the window of this tool.
The graph plot of my seismic traces works correctly, but the window to select the working paramenters not appears.
I tried to remove the dir .geopsydefault and to re-install the release but the same problem occurs.
Any ideas?
Thanks

Post by **admin** » Mon May 12, 2008 3:36 pm

Hi Giuseppe,

What sesarray release are you using?

gdg · Post by **gdg** » Tue May 13, 2008 7:28 am

Hi Marc,
the win2.0.0beta release.

Post by **admin** » Tue May 13, 2008 2:57 pm

You can safely use the latest snapshot. it is rather stable now. In any case, if you encounter crashes or bugs, I can fix them directly. My intend is to move quickly the development release to a stable one and replace the old 2.0.0 beta release from June 2006.

Linearfk tool has been drastically improved last year.

gdg · Post by **gdg** » Mon May 19, 2008 10:33 am

Hi Marc,
Now I am using the last snapshot (20080517).

In the linear active fk toolbox, I see the minimum and maximum distance source-receiver.
How can I change the shot position ?

In old releases, I used the backazimuth wavefront to distinguish between forward and reverse shots (i.e. 0 means forward and 270 reverse).
In the last snapshot can be this achieved with the shot position?

Giuseppe

Post by **admin** » Thu Jun 05, 2008 12:38 pm

Source from signal properties are now used. They are displayed in the table. If not visible (default setup), you must change the fields displayed in the table (menu View/Set data fields). You can edit source positions by unlocking the table edition (menu Edit) but this is not the fastest method. There are also the "Set headers" and "Set sources" from menu "Edit".

gdg · Post by **gdg** » Mon Jun 09, 2008 9:16 am

Hi,
I am using the linear fk on active data. In particular I am trying to investigate the effect of normalization on the dispersion curve.
From a theoretical point of view the normalization using sqrt of distance is correct working with surface waves. Although this, it seems me that:
1) the normalization in terms of maximum amplitude and spectral energy produces more evident and clear dispersion curves than normalization with distance
2) the normalization in terms of distance (or sqrt distance) can give maxima in the plane slowness/frequency at larger slowness

What is your feeling about the normalization?

Giuseppe

Post by **admin** » Mon Jun 09, 2008 9:41 am

Hi Giuseppe,

I've little experience about the different normalizations. I usually set it to sqrt(distance). I'll test it next time I'll play with active source experiments. Thanks for your feedback.

Marc