How to specify the type of IP array before to run an inversion

[wgarrido10]

Hi there: do you know where to specify the type of IP array configuration (dipole-dipole, pole-dipole, pole-pole, etc.) in files before to run a dcinv2d or ipinv2d inversion? Do you have an example? for instance for three configurations mentioned above (dipole-dipole, pole-dipole and pole-pole). Thanks a lot for your support!! Walter

[fourndo]

Hi Walter (@wgarrido10) ,

Short answer is that it depends on which version of the code you are running For the latest release (v5), the source or receiver is considered to be a pole (infinity) if the second coordinate location is identical to the first one (A=B) or (M=N).

Take a look at the Observation File Section of the manual..

The example provided also uses a pole-dipole configuration.

For the old version (3.2), the survey type was specified in the header of the file. Have a look here

Hope this helps,

Dom

[wgarrido10]

Thanks Dom,

I understand then, if the array is a Dipole-Dipole survey, let say something like following of obs data for TX and RX:

T1X T2x R1X R2X -200 -100 0 100 -200 -100 100 200 ETC

It should be just:

T1X T2x R1X R2X -100 -100 0 100 -100 -100 100 200 ETC

Of course for v5

Regards, Walter

On Sat, Jul 7, 2018 at 12:59 PM, dom notifications@github.com wrote:

Hi Walter,

Short answer is that it depends on which version of the code you are running For the latest release (v5), the source or receiver is considered to be a pole (infinity) if the second coordinate location is identical to the first one (A=B) or (M=N).

Take a look at the Observation File Section of the manual. http://dcip2d.readthedocs.io/en/latest/content/observations.html#simple-format .

The example provided http://dcip2d.readthedocs.io/en/latest/content/examples.html#examples also uses a pole-dipole configuration.

For the old version (3.2), the survey type was specified in the header of the file. Have a look here https://www.eoas.ubc.ca/research/ubcgif/iag/sftwrdocs/dcip2d/index.htm

Hope this helps,

Dom

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-- Walter Garrido Manager and senior geophysicist, MSc Mob.: +56-9 9325 3429 Email: wgarrido10@gmail.com wgarrido10@gmail.com Skype: wgarrid PG CONSULTING SPA

[fourndo]

Hmmm maybe I m not understanding you right.

If your survey is DP-DP, than you want to input the locations of both poles (A-B) and (M-N) like you wrote the first time.

The way you wrote it the second time, it would assume a P-DP survey...

Makes sense?

[wgarrido10]

Dom:

The manual is not so clear. I understand what you day but where and how I should tell the program the configuration is Dipole-Dipole or Pole-Dipole or Pole-Pole.

Thanks, Walter

El sáb., 7 de jul. de 2018 13:47, dom notifications@github.com escribió:

Hmmm no, if your survey is DP-DP, than you want to input the locations of both pole (A-B) and (M-N) like you wrote the first time. The way you wrote it the second time, it would assume a P-DP survey...

Makes sense?

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[fourndo]

The program figures it out depending on the observation file. That's it, you don't need to do anything else. The physics is driven by where the source and receivers poles are located.

[wgarrido10]

Dom:

The problem is when the program reads the observation file sends me the following error:

And the beginning of observation file is showed below:

The error does not happen if the observation file is as showed below:

On Sat, Jul 7, 2018 at 6:12 PM, dom notifications@github.com wrote:

The program figures it out depending on the observation file. That's it, you don't need to do anything else.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/ubcgif/help/issues/5#issuecomment-403246116, or mute the thread https://github.com/notifications/unsubscribe-auth/AnBeGBuoyvWQENjU0zlNxofMGh6ebhDDks5uETJTgaJpZM4VGZM9 .

-- Walter Garrido Manager and senior geophysicist, MSc Mob.: +56-9 9325 3429 Email: wgarrido10@gmail.com wgarrido10@gmail.com Skype: wgarrid PG CONSULTING SPA

[fourndo]

Sorry Walter, I am not seeing the error. Maybe send me an email, instead. fourndo@gmail.com

Will work this out.