scholarly journals Stochastic post-processing of the deterministic boundary element modelling of the transient electric field from GPR dipole antenna propagating through lower half-space

2017 ◽  
Vol 5 (5) ◽  
pp. 678-685 ◽  
Author(s):  
D. Poljak ◽  
S. Sesnic ◽  
S. Lallechere ◽  
K. el Khamlichi Drissi
Keyword(s):  
Electric Field ◽  
Boundary Element ◽  
Half Space ◽  
Dipole Antenna ◽  
Lower Half ◽  
Post Processing ◽  
Element Modelling ◽  
Lower Half Space ◽  
Transient Electric Field

Estimating the parameters of simple models from two-component on-time airborne electromagnetic data

Geophysics ◽  
2021 ◽  
pp. 1-52
Author(s):  
Thomas Bagley ◽  
Richard S. Smith
Keyword(s):  
Half Space ◽  
Thin Sheet ◽  
Lower Half ◽  
Thick Sheet ◽  
Thin Sheets ◽  
Survey Area ◽  
Lower Half Space ◽  
Drill Holes ◽  
Airborne Electromagnetic Data ◽  
Simple Models

The horizontal and vertical components of the on-time electromagnetic (EM) response can be used to estimate the parameters of simple models like thin sheets, half-spaces, thin sheets over a lower half-space and a two-layer model. The formulae used in these methods are valid in areas where the on-time response is essentially proportional to the conductivity or conductance, the so called "resistive limit". The half-space and thin-sheet over a lower half-space models can be combined to give an estimate of the conductivity for a lower half-space below a thick sheet that might be reasonable for the whole of the survey area. With this estimation an equation solver can be used to estimate the thickness and conductivity of the overlying thick sheet over the whole survey area. This latter approach seemed most appropriate for the Russell South area in the Athabasca Basin, Canada, where GEOTEM data has been collected. The output of the algorithm was generally stable. Although it did not always reliably reproduce the overburden thicknesses as measured in a set of reference drill holes, it did give an estimate that was reasonable in the relatively conductive areas.

Reply by the author to W. K. McClary

Geophysics ◽  
1985 ◽  
Vol 50 (8) ◽  
pp. 1357-1357
Author(s):  
Sven Treitel
Keyword(s):  
Half Space ◽  
Output Signal ◽  
Lower Half ◽  
Lower Half Space

We are pleased to see Mr. McClary shed more light on the concept of a generalized primary. To construct the generalized primary of the nth interface as a transmitted output signal in the upper half‐space for the input wavelet −X in the lower half‐space not only indicates that this can be done, but that the construction is appealing and that it clarifies the entire concept.

scholarly journals ANALYTICAL CONTINUATION OF POTENTIAL FIELDS ON THE BASIS OF F-APPROXIMATIONS

2015 ◽  
Author(s):  
И.А. Керимов
Keyword(s):  
Half Space ◽  
Analytical Continuation ◽  
Lower Half ◽  
Potential Fields ◽  
Lower Half Space ◽  
Computer Technologies

В статье рассмотрен метод аналитического продолжения потенциальных полей на основе F-аппроксимации. Разработанный автором метод позволяет выполнять аналитическое продолжение поля в верхнее и нижнее полупространство. Компьютерные технологии позволяют выполнять трансформации для данных заданных как для регулярной, так и для нерегулярной сети. Метод апробирован на модельных и фактических гравиметрических данных The method of analytical continuation of potential fields on the basis of F-approximation is considered in the article. The method developed by the author allows carrying out analytical continuation of field to the upper and the lower half-space. Computer technologies allow making transformations for data prescribed both for regular and for irregular network. The method is tested on model and actual gravimetric dat

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