Search found 9 matches

by akoehler
Tue Apr 11, 2017 8:17 am
Forum: Ambient vibration techniques
Topic: How to export values from Spectrum Rotate via Command Line
Replies: 2
Views: 16023

Re: How to export values from Spectrum Rotate via Command Line

Hi, I have the same problem. Is geopsyhv with -slot 3 supposed to write out anything? geopsy -tool geopsyhv -slot 3 test.mseed -- -param test.log -save test -autowin When I use the gui version and specify the output directory, no results are written either. I'm using version geopsypack-2.10.1. Thank...
by akoehler
Tue Jun 28, 2011 10:11 am
Forum: Dinver usage
Topic: Batch option of dinver command line
Replies: 1
Views: 3421

Batch option of dinver command line

Hi Marc, Just upgraded dinver to the latest version. I have seen that the "-batch" option of command line dinver is no longer available. Instead one can use "-optimization". Is it still possible to start several processes at the same time and create report files like *_0?.report ...
by akoehler
Fri Feb 11, 2011 9:20 am
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

Just talked to Valerie. She also still has the original version. She will check what modifications she made we may need. I will come back to you ...
by akoehler
Fri Feb 11, 2011 8:52 am
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

Apart from the licence question, which we have to solve somehow, do you have access to Saitos code, Marc? I'm working with a version, which has been modified a bit by Valerie Maupin since the code arrived in Oslo 20 years ago. But we could prepare or find a clean version and send it to you.
by akoehler
Thu Feb 10, 2011 10:51 am
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

The code was originally distributed with the book from 1988 "Seismological Algorithms: Computational Methods and Computer Programs". Saitos package was called "DISPER80: A subroutine package for the calculation of seismic normal-mode solutions". The book says that everyone who wa...
by akoehler
Wed Feb 09, 2011 4:48 pm
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

Yes, using Saito for forward computation would be the "cleanest" or most accurate solution. Would it be possible to include a fortran code directly as a plugin or has it to be rewritten in cpp? I could forward you the code if you want to have a look. I compared the Saito (spherical) and di...
by akoehler
Wed Feb 09, 2011 1:03 pm
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

There are basically three ways to take into account the spherical earth: 1. Correct phase velocities empirically (don't have to change anything in dinver). Bhattacharyam, 1976 is showing a plot of that relation (Fig 1), but I also tried to find one by myself by simply generating random models (gppar...
by akoehler
Wed Feb 09, 2011 11:07 am
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

We are using the program of Saito for the forward computation in a spherical earth. The problem may be that it is written in fortran and, more serious, that it needs much more computation time than computing velocities from a layered model in a flat earth. In order to take into account the spherical...
by akoehler
Tue Feb 01, 2011 4:13 pm
Forum: Dinver usage
Topic: spherical earth and dinver
Replies: 15
Views: 9492

spherical earth and dinver

Hi Marc, I'm using dinver to invert phase velocities at longer periods (noise cross-correlation). From about 20 s period, it starts to have a significant effect on phase velocities whether they are computed from a flat or from a spherical earth model. I was just wondering if it would be straight for...

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