99 lines
3.8 KiB
C++
99 lines
3.8 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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#include "gctl/core.h"
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#include "gctl/io.h"
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#include "gctl/potential.h"
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using namespace gctl;
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int main(int argc, char *argv[]) try
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{
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// Read SHC coefficients
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dsv_io shc_in;
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shc_in.head_number(9);
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shc_in.load_text("data/Ravaetal2020/LP1999_L1_d450", ".cof");
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shc_in.info(HeadInfo|ColInfo);
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_1d_array gnm, hnm;
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shc_in.get_column(gnm, 3);
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shc_in.get_column(hnm, 4);
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// Prepare SHC data
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//shc_data sd;
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//sd.init(gnm, hnm, 1, 0, 450, 450);
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// Prepare observation sites
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array<point3ds> obsp;
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grid_points_2d(obsp, -179.5, 179.5, -89.5, 89.5, 1.0, 1.0, 1737.4 + 30.0, TopLeft);
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// Calculate over all observation sites
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int id;
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double rad, fx, fy, fz;
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_1d_array P, dP;
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_1d_array Br(obsp.size(), 0.0), Bt(obsp.size(), 0.0), Bp(obsp.size(), 0.0);
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progress_bar bar(obsp.size(), "Progress");
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for (int p = 0; p < obsp.size(); p++)
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{
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bar.progressed(p);
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rad = obsp[p].rad;
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schmidt_legendre(90.0 - obsp[p].lat, 450, P, dP);
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// 注意跳过第0阶0次项
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for (size_t i = 1; i <= 450; i++)
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{
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id = i*(i + 1)/2;
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fx = pow(1737.4/rad, i+2);
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fz = -1.0*(i+1)*pow(1737.4/rad, i+2);
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for (size_t j = 0; j < i+1; j++)
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{
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fy = j/sind(90.0 - obsp[p].lat)*pow(1737.4/rad, i+2);
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Bt[p] += -1.0*fx*(cosd(j*obsp[p].lon)*dP[id + j]*gnm[id + j] + sind(j*obsp[p].lon)*dP[id + j]*hnm[id + j]);
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Bp[p] += fy*(sind(j*obsp[p].lon)*P[id + j]*gnm[id + j] - cosd(j*obsp[p].lon)*P[id + j]*hnm[id + j]);
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Br[p] += fz*(cosd(j*obsp[p].lon)*P[id + j]*gnm[id + j] + sind(j*obsp[p].lon)*P[id + j]*hnm[id + j]);
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}
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}
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}
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geodsv_io magout;
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magout.init_table(obsp.size(), 6);
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magout.column_names({"lon", "lat", "rad", "Br", "Bt", "Bp"});
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magout.fill_column_point3ds(obsp, "rad", "lon", "lat");
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magout.fill_column(Br, "Br");
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magout.fill_column(Bt, "Bt");
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magout.fill_column(Bp, "Bp");
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magout.save_csv("data/Ravaetal2020/LP1999_L1_d450_30km_grid");
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return 0;
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}
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catch (std::exception &e)
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{
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GCTL_ShowWhatError(e.what(), GCTL_ERROR_ERROR, 0, 0, 0);
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}
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