58 lines
2.9 KiB
C
58 lines
2.9 KiB
C
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/********************************************************
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* ██████╗ ██████╗████████╗██╗
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* ██╔════╝ ██╔════╝╚══██╔══╝██║
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* ██║ ███╗██║ ██║ ██║
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* ██║ ██║██║ ██║ ██║
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* ╚██████╔╝╚██████╗ ██║ ███████╗
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* ╚═════╝ ╚═════╝ ╚═╝ ╚══════╝
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* Geophysical Computational Tools & Library (GCTL)
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*
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* Copyright (c) 2022 Yi Zhang (yizhang-geo@zju.edu.cn)
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*
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* GCTL is distributed under a dual licensing scheme. You can redistribute
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* it and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, either version 2
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* of the License, or (at your option) any later version. You should have
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* received a copy of the GNU Lesser General Public License along with this
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* program. If not, see <http://www.gnu.org/licenses/>.
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*
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* If the terms and conditions of the LGPL v.2. would prevent you from using
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* the GCTL, please consider the option to obtain a commercial license for a
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* fee. These licenses are offered by the GCTL's original author. As a rule,
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* licenses are provided "as-is", unlimited in time for a one time fee. Please
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* send corresponding requests to: yizhang-geo@zju.edu.cn. Please do not forget
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* to include some description of your company and the realm of its activities.
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* Also add information on how to contact you by electronic and paper mail.
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******************************************************/
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#ifndef _GCTL_MAGNETOMETRIC_H
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#define _GCTL_MAGNETOMETRIC_H
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#include "cstddef"
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namespace gctl
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{
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/**
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* @brief Forward modeling of the magnetometric resistivity (MMR) data of a outcropping hemispherical depression
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*
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* @note Edwards et al., (1978). On the theory of magnetometric resistivity (MMR) methods. Geophysics, 43(6), 1176-1203.
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*
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* @param x Field point coordinate x
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* @param y Field point coordinate y
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* @param cx Current source coordinate x
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* @param cy Current source coordinate y
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* @param I Current value
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* @param hx Center coordinate x of the depression
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* @param hy Center coordinate y of the depression
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* @param hr Radius of the depression
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* @param cndt conductivity of the depression
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* @param bkg_cndt conductivity of the host medium
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* @param order Calculating order of the legendre polynomials (default is 10)
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* @return Vertical component (Bz) of the anomalous magnetic field
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*/
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double mmr_hemisphere_bz(double x, double y, double cx, double cy, double I,
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double hx, double hy, double hr, double cndt, double bkg_cndt, size_t order = 10);
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} // namespace gctl
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#endif // _GCTL_MAGNETOMETRIC_H
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