GPT.hpp

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// This file is part of INSTINCT, the INS Toolkit for Integrated
// Navigation Concepts and Training by the Institute of Navigation of
// the University of Stuttgart, Germany.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 
#pragma once
 
#include "Eigen/Dense"
 
namespace NAV
{
struct GPT2output
{
    double p{};    
    double T{};    
    double dT{};   
    double Tm{};   
    double e{};    
    double ah{};   
    double aw{};   
    double la{};   
    double undu{}; 
};
 
struct GPT3output : public GPT2output
{
    double Gn_h{}; 
    double Ge_h{}; 
    double Gn_w{}; 
    double Ge_w{}; 
};
 
GPT2output GPT2_param(const double& mjd, const Eigen::Vector3d& lla_pos);
 
GPT3output GPT3_param(const double& mjd, const Eigen::Vector3d& lla_pos);
 
double mjd2doy(const double& mjd);
 
double asknewet(const double& e, const double& Tm, const double& la);
 
} // namespace NAV