Best software for seismic refraction tomography

[Preston09]

My problem with this Geometrics software SeisImager2D is that it's not stable - I guess it has some bugs, maybe with some memory allocation problems or something. Otherwise it should at least be an OK program for me.

The other thing is that it's not easy to convert the tomography result directly into a layered model - it's hard to get a meaning result. I am still working on it and try to get familiar with this function.

[kaminae]

I guess that diffrer between softwares is
stability of inversion's results
Interface options
Simpleness of using
Working with import/export
Using of apriori information

In formal way softwares gives similar results

[ncoord]

Good points. Another thing to consider is of course the price

[resour]

For optimized interpretation of SAGEEP 11 blind refraction session see

http://rayfract.com/tutorials/SAGEEP11_13.pdf

with final tomogram as attached :

[resour]

My interpretation with Rayfract(R) 3.25 and pseudo-2D DeltatV starting model :

[Preston09]

So Rayfract can also work "blindly" on data, good to know. The results look similar to the results of other programs.

[ncoord]

It's nice to have another software to compare

[kaminae]

Hi guys! Nice to see that this topic is not frozen.
I have some new ideas about non-linear inversion for refraction tomography based on Madden-Mackie approach.
I suppose it can gives better results in comparision with standart inversion.
Alex
But still with opinion that the best way - including of a priori information in inversion.

[resour]

My interpretation of P-waves.txt, with 1D-gradient starting model and 100 WET iterations :

[resour]

And here my S-waves.txt interpretation, also with 1D-gradient starting model and 100 WET iterations, wavepath width 20% :

[Preston09]

It's impressive to have such good results on ground surfaces with highly topographic change!

[resour]

For updated .pdf showing 1D-gradient starting model obtained with 1.5D DeltatV inversion and horizontal averaging and 2D Conjugate Gradient Fresnel volume tomography see

http://rayfract.com/tutorials/ZONDDATA.pdf

[kaminae]

One more synthetic example. Very interesting.

[resour]

For a comparison of our Smooth inversion/WET tomography with other algorithms, based on SAGEEP 2011 blind refraction data see

Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity Models from First-Arrival Traveltimes (Colin Zelt et al., JEEG Sep 2013)

http://dx.doi.org/10.2113/JEEG18.3.183

[kaminae]

Any results on zonddata2? A small trick in this model.

[muroinho007]

best is your codes if u can write use matlab for this

http://geophysicscience.blogspot.com/20 ... ysics.html

and an example for 3d masw codes on matlab writed by myself. good luck.


http://geophysicscience.blogspot.com/2013/03/masw.html

[resour]

For our SAGEEP14 expanded abstract see

http://rayfract.com/pub/sageep14.pdf

[resour]

For optimized interpretation with our Conjugate Gradient Fresnel volume tomography see updated

http://rayfract.com/tutorials/ZONDDATA.pdf

. See below for the final tomogram. We used a square cell sized 0.57m by 0.57m, resulting in a grid size of 41 rows vs. 183 columns and 7,503 nodes.

WET inversion time was 20 seconds on a MacBook Air running Windows 7 in Parallels Desktop 8 using 4 CPU cores in parallel, for inversion of 421 synthetic traveltimes.

[peterkunbo]

Hi. I would like to use Kaminae synthetic data for my research. I will appreciate it if you can provide me with your full name or a link to your homepage if you have one so that I can do proper acknowledgement in publication.

[kaminae]

Hi Peter!
Details of mine:
Alex Kaminsky. Zond software ltd.
www.zond-geo.ru/english
zondgeo@gmail.com

[peterkunbo]

Thank you Alex (Kaminae).

[lecxis]

Hello guys, Please I have the Zone software for seismic and electrical resistivity. The problem is I don't know how to use it. the manual that came with it is in Russian( I guess). Can anyone help with a tutorial link or a manual written in English. thanks

[kaminae]

Hi
Did You checked software's folder for zondres2d_eng.pdf and zondst2d_eng.pdf?

[lecxis]

The manual I saw in both types were written in Russian. I would appreciate it if you can help me with the English version.

[kaminae]

zondres2d_eng.pdf inside next archive:
http://zond-geo.ru/zfiles/Zondres2d.zip