Thank you, Greg. I should have asked that question in more simple words: I am working with a dataset (5 frequency Hummingbird system) which contains only the calculated apparent resistivity. Measured amplitudes (In-Phase and Quadrature) are missing. Would that be enough to do plate (forward) modeling? I guess it is.
Perhaps it is best to contact EMIT to get an evaluation license. Regards On Sat, Nov 21, 2020 at 2:08 PM Greg Hodges <[email protected]> wrote: > Hi, Sergio. > I'm not sure I understand the question - or the problem - so maybe others > don't either. > > If you're inverting (FDEM), the input is in-phase and quadrature > (normally) and apparent conductance (conductivity-thickness product, or > CTP) is a product along with the other plate parameters. > > If you're forward modeling, the conductivity is an input as part of the > CTP, and the EM response is the product, or output. From that EM we can > estimate a CTP (and then assign a thickness to get conductivity), but that > derived CTP depends on the plate model used. Changes in the size of the > plate (particularly the minimum dimension) change the phase angle (or decay > constant in TDEM) and therefore the estimated apparent CTP and > conductivity. > > Of course, when forward modeling you can use the size of the model plate > in your calculation of apparent conductance, but then you should get back > the initial model conductance (in the absence of other interfering factors, > like host response). > > So, what kind of model are you running, and what are you trying to get out > of it? > > Greg Hodges > > > On Friday, November 20, 2020, 05:17:12 p.m. EST, S E Geoscience and > Exploration via SEGMIN <[email protected]> wrote: > > > Re: Question about plate modeling with Maxwell > > Dear all, > > It has been a while since I worked last with Maxwell. > > Do you know whether we can model plates with just the calculated apparent > conductivity and without the in-phase and quadrature amplitudes? > > Regards > > -- > *Sergio Espinosa, Ph.D., P.Geo* > Director, Geophysics > *S E G*eoscience & *Ex*ploration > ----------------------- > SEGMIN community mailing list service ([email protected]). > Change your personal options here: > https://lists.geosoft.com/mailman/options/segmin/hodgesgreg%40ymail.com > Colleagues can join here: > https://lists.geosoft.com/mailman/listinfo/segmin > Archives: https://lists.geosoft.com/mailman/private/segmin/ > NOTE that <Reply> will reply to all members of the list. > -- *Sergio Espinosa, Ph.D., P.Geo* Director, Geophysics *S E G*eoscience & *Ex*ploration
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