Search found 446 matches

by admin
Thu Jul 02, 2020 7:21 am
Forum: Ambient vibration techniques
Topic: Is this idea correct?
Replies: 5
Views: 454

Re: Is this idea correct?

Note that the spectra of Z, N and E do not necessarily have a peak. A typical shape is the the so-called "eye shape" around the H/V peak where the vertical component vanishes while the horizontal component not. The result is a peak on the H/V spectral ratio. Hence, peaks appear on the spectral ratio...
by admin
Tue Jun 30, 2020 8:06 am
Forum: Ambient vibration techniques
Topic: Is this idea correct?
Replies: 5
Views: 454

Re: Is this idea correct?

In the bottom left you can see what should be the resonant frequencies fro axis x,y,z. What are X, Y, Z? Are they the three components of the particle motion (Z for vertical)? I guess so but better to be explicit. Is it the simply the spectrum of the three components that are shown? The software lo...
by admin
Fri Jun 19, 2020 8:49 pm
Forum: General usage
Topic: Windows command line
Replies: 2
Views: 945

Re: Windows command line

Hi, There are several tools under Windows to emulate a bash terminal. If you install git for Windows, there is nice terminal available (the one I'm using for compiling geopsy). MobaXterm Cygwin MSYS ... I also read that it possible also to install a true Ubuntu/Windows terminal and X server for Wind...
by admin
Tue Jun 16, 2020 1:22 pm
Forum: Geopsy usage
Topic: HVSR usage - please help
Replies: 3
Views: 490

Re: HVSR usage - please help

From your snapshot (see attached PNG file), we can see that the graphic contains 3 signals tagged as Vertical components. Hence, it is not possible to attach a H/V tool to such viewer without getting an error. In the above table, you edited the components to have the correct component tags. The H/V ...
by admin
Mon Jun 15, 2020 8:49 am
Forum: General usage
Topic: Difference betwen seismic file format
Replies: 1
Views: 18505

Re: Difference betwen seismic file format

SU is a subset of SEGY headers. It is used by Seismic Unix. Big or Little endian has to see with the order of bytes. For more information, please read https://en.wikipedia.org/wiki/Endianness SEG-2 is a binary format with little link to SEGY familly. It is mainly used by active source recording devi...
by admin
Mon Jun 15, 2020 8:41 am
Forum: Geopsy usage
Topic: How use MSPAC in geopsy?
Replies: 1
Views: 339

Re: How use MSPAC in geopsy?

The processing implemented in spac2disp is explained in Wathelet et al. 2005. If you want a PDF copy, send me an email or a private message.
by admin
Mon Jun 15, 2020 8:25 am
Forum: Geopsy usage
Topic: gphistogram-RTBF
Replies: 1
Views: 307

Re: gphistogram-RTBF

Effectively this old feature of selecting data band per band is still there but probably not working correctly. There a faster way of selecting data. Add a new line (right click on the plot) to delineate a limit. Then go to "filter", you can remove samples in different ways (above, below, between,.....
by admin
Mon Jun 15, 2020 8:21 am
Forum: Geopsy usage
Topic: HVSR usage - please help
Replies: 3
Views: 490

Re: HVSR usage - please help

As I wrote in another post, whenever you observe the error, send me the file so that I can reproduce the error and eventually fix it.
by admin
Mon Jun 15, 2020 8:18 am
Forum: Installation
Topic: reinstall of Geopsy
Replies: 1
Views: 421

Re: reinstall of Geopsy

Install it in a different path. Expect some minor problems when running two incompatible version: The same configuration is shared by all versions, hence there can be some minor problems. Geopsy tools are plugins. Each time you switch from one version to the other, make sure that you change the path...
by admin
Mon Jun 15, 2020 8:12 am
Forum: Ambient vibration techniques
Topic: Is this idea correct?
Replies: 5
Views: 454

Re: Is this idea correct?

Hi Enzo,

Do you have a paper or a report that describes the details of your approach? Without any indication it is difficult to provide an opinion.
by admin
Mon Jun 15, 2020 8:08 am
Forum: Geopsy usage
Topic: Hidden time windows H/V
Replies: 3
Views: 525

Re: Hidden time windows H/V

Whenever you get this problem, try to send me a file example.
Next release 3.3.0 will be out soon. The H/V tools has been re-written and probably hidden time windows may be solved.
by admin
Mon Jun 15, 2020 8:03 am
Forum: Geopsy usage
Topic: HVSR usage - please help No.2
Replies: 1
Views: 135

Re: HVSR usage - please help No.2

Select the 3 rows containing true signals and drag them to a new graphic (icon in the toolbar).
A new graphic with the only the 3 good signals will be displayed. Run the H/V tool, you should not get any error message.

Best regards,

Marc
by admin
Mon Jun 15, 2020 7:59 am
Forum: Dinver usage
Topic: Simultaneous inversion of dispersion and attenuation curves
Replies: 1
Views: 399

Re: Simultaneous inversion of dispersion and attenuation curves

Hi Javier, Attenuation is currently not yet available and there is no active project in that direction. But it should be initiated soon or later. There is a dinver plugin to start a Matlab script for solving the forward problem. It is not compiled for Windows because of license problems. Under Linux...
by admin
Mon Jun 15, 2020 7:48 am
Forum: Miscellaneous
Topic: Swapping X and Y of a plot with grid value
Replies: 0
Views: 684

Swapping X and Y of a plot with grid value

Click on "Export values" (context menu on any plot with grid values), for instance to /tmp/grid Go into the properties of the layers, under the color map section, save it to /tmp/toto.pal Run the following script: cat grid | awk 'BEGIN{print "x y val"}!/x y/{print $2,$1,$3}' | figue -g -colormap /t...
by admin
Fri May 29, 2020 11:48 am
Forum: Geopsy usage
Topic: bad sampling frequency
Replies: 3
Views: 548

Re: bad sampling frequency

CR alone as an end of line marker is the standard for some old systems (MacOS9, Commodore64 & 128,...) according to wikipedia. If is a systematic output of Dolang SAF files, it might be worth to send them a bug report and to fix it with a CR/LF or LF only.