GeomagneticModel.hpp

/*
 * (c) Copyright 2021 CORSIKA Project, corsika-project@lists.kit.edu
 *
 * This software is distributed under the terms of the GNU General Public
 * Licence version 3 (GPL Version 3). See file LICENSE for a full version of
 * the license.
 */

#pragma once

#include <corsika/framework/core/PhysicalUnits.hpp>
#include <corsika/framework/geometry/PhysicalGeometry.hpp>
#include <corsika/framework/utility/CorsikaData.hpp>

#include <boost/filesystem.hpp>
#include <fstream>
#include <string>

namespace corsika {

  class GeomagneticModel {

    struct ParameterLine {
      int n;
      int m;
      double g;
      double h;
      double dg; //< time dependence of g in "per year"
      double dh; //< time dependence of h in "per year"
    };

  public:
    GeomagneticModel(Point const& center, boost::filesystem::path const path =
                                              corsika::corsika_data("GeoMag/WMM.COF"));

    MagneticFieldVector getField(double const year, LengthType const altitude,
                                 double const latitude, double const longitude);

  private:
    Point center_;                                         //< Center of Earth.
    std::map<int, std::vector<ParameterLine>> parameters_; //< epoch to Parameters map
  };
} // namespace corsika

#include <corsika/detail/media/GeomagneticModel.inl>