eive-obsw/mission/controller/acs/Igrf13Model.h

/*
 * Igrf13Model.h
 *
 *  Created on: 10 Mar 2022
 *      Author: Robin Marquardt
 *      Description: Calculates the magnetic field vector of earth with the IGRF Model.
 *      Sources: https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
 *      https://doi.org/10.1186/s40623-020-01288-x
 *      J. Davis, Mathematical Modeling of Earth's Magnetic Field, TN, 2004
 *
 *      [Conversion of ENU (geocentric)  to IJK: Skript Bahnmechanik für Raumfahrzeuge,
 *      Prof. Dr.-Ing. Stefanos Fasoulas / Dr.-Ing. Frank Zimmermann]
 *
 */

#ifndef IGRF13MODEL_H_
#define IGRF13MODEL_H_

#include <fsfw/parameters/HasParametersIF.h>
#include <stdint.h>
#include <string.h>
#include <time.h>

#include <cmath>

// Output should be transformed to [T] instead of [nT]
// Updating Coefficients has to be implemented yet. Question, updating everyday ?
class Igrf13Model /*:public HasParametersIF*/ {
 public:
  Igrf13Model();
  virtual ~Igrf13Model();

  // Main Function
  void magFieldComp(const double longitude, const double gcLatitude, const double altitude,
                    timeval timeOfMagMeasurement, double* magFieldModelInertial);
  // Right now the radius for igrf is simply with r0 + altitude calculated. In reality the radius is
  // oriented from the satellite to earth COM Difference up to 25 km, which is 5 % of the total
  // flight altitude
  /* Inputs:
   * - longitude: geocentric longitude [rad]
   * - latitude: geocentric latitude [rad]
   * - altitude:  [m]
   * - timeOfMagMeasurement: time of actual measurement [s]
   *
   * Outputs:
   * - magFieldModelInertial: Magnetic Field Vector in IJK RF [nT]*/

  // Coefficient wary over year, could be updated sometimes.
  void updateCoeffGH(timeval timeOfMagMeasurement);  // Secular variation (SV)
  double magFieldModel[3];
  void schmidtNormalization();

 private:
  double coeffG[14][13] = {
      {-29404.8, -2499.6, 1363.2, 903.0, -234.3, 66.0, 80.6, 23.7, 5.0, -1.9, 3.0, -2.0, 0.1},
      {-1450.9, 2982.0, -2381.2, 809.5, 363.2, 65.5, -76.7, 9.7, 8.4, -6.2, -1.4, -0.1, -0.9},
      {0.0, 1677.0, 1236.2, 86.3, 187.8, 72.9, -8.2, -17.6, 2.9, -0.1, -2.5, 0.5, 0.5},
      {0.0, 0.0, 525.7, -309.4, -140.7, -121.5, 56.5, -0.5, -1.5, 1.7, 2.3, 1.3, 0.7},
      {0.0, 0.0, 0.0, 48.0, -151.2, -36.2, 15.8, -21.1, -1.1, -0.9, -0.9, -1.2, -0.3},
      {0.0, 0.0, 0.0, 0.0, 13.5, 13.5, 6.4, 15.3, -13.2, 0.7, 0.3, 0.7, 0.8},
      {0.0, 0.0, 0.0, 0.0, 0.0, -64.7, -7.2, 13.7, 1.1, -0.9, -0.7, 0.3, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 9.8, -16.5, 8.8, 1.9, -0.1, 0.5, 0.8},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -0.3, -9.3, 1.4, 1.4, -0.3, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -11.9, -2.4, -0.6, -0.5, 0.4},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -3.8, 0.2, 0.1, 0.1},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 3.1, -1.1, 0.5},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -0.3, -0.5},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -0.4}};  // [m][n] in nT

  double coeffH[14][13] = {
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0},
      {4652.5, -2991.6, -82.1, 281.9, 47.7, -19.1, -51.5, 8.4, -23.4, 3.4, 0.0, -1.2, -0.9},
      {0.0, -734.6, 241.9, -158.4, 208.3, 25.1, -16.9, -15.3, 11.0, -0.2, 2.5, 0.5, 0.6},
      {0.0, 0.0, -543.4, 199.7, -121.2, 52.8, 2.2, 12.8, 9.8, 3.6, -0.6, 1.4, 1.4},
      {0.0, 0.0, 0.0, -349.7, 32.3, -64.5, 23.5, -11.7, -5.1, 4.8, -0.4, -1.8, -0.4},
      {0.0, 0.0, 0.0, 0.0, 98.9, 8.9, -2.2, 14.9, -6.3, -8.6, 0.6, 0.1, -1.3},
      {0.0, 0.0, 0.0, 0.0, 0.0, 68.1, -27.2, 3.6, 7.8, -0.1, -0.2, 0.8, -0.1},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -1.8, -6.9, 0.4, -4.3, -1.7, -0.2, 0.3},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 2.8, -1.4, -3.4, -1.6, 0.6, -0.1},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 9.6, -0.1, -3.0, 0.2, 0.5},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -8.8, -2.0, -0.9, 0.5},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -2.6, 0.0, -0.4},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.5, -0.4},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -0.6}};  // [m][n] in nT

  double svG[14][13] = {
      {5.7, -11.0, 2.2, -1.2, -0.3, -0.5, -0.1, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {7.4, -7.0, -5.9, -1.6, 0.5, -0.3, -0.2, 0.1, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, -2.1, 3.1, -5.9, -0.6, 0.4, 0.0, -0.1, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, -12.0, 5.2, 0.2, 1.3, 0.7, 0.4, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, -5.1, 1.3, -1.4, 0.1, -0.1, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.9, 0.0, -0.5, 0.4, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.9, -0.8, 0.3, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.8, -0.1, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.4, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}};  // [m][n] in nT

  double svH[14][13] = {
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {-25.9, -30.2, 6.0, -0.1, 0.0, 0.0, 0.6, -0.2, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, -22.4, -1.1, 6.5, 2.5, -1.6, 0.6, 0.6, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.5, 3.6, -0.6, -1.3, -0.8, -0.2, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, -5.0, 3.0, 0.8, -0.2, 0.5, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.3, 0.0, -1.1, -0.3, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.1, -0.4, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.3, 0.5, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0},
      {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}};  // [m][n] in nT
  
  double schmidtFactors[14][13] = {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  			{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};
  ;
  bool schmidtNorm = false;

  double updatedG[14][13];
  double updatedH[14][13];
  static const int igrfOrder = 13;  // degree of truncation
};

#endif /* IGRF13MODEL_H_ */