#ifndef SGDP4_H_
#define SGDP4_H_

#include "Tle.h"

class SGDP4 {
public:
    SGDP4(void);
    virtual ~SGDP4(void);

    void Initialize(const Tle& tle);

    void FindPosition(double tsince);

    struct TleData {
        double bstar;
        double eo;
        double omega;
        double xincl;
        double xmo;
        double xno;
        double xnodeo;
        Julian epoch;
    };

private:
    bool first_run_;

    struct TleData tle_data_0_;

    double cosio_;
    double sinio_;
    double xnodp_;
    double aodp_;
    double x3thm1_;

    double eta_;
    double coef1_;
    double c1_;
    double a3ovk2_;
    double x1mth2_;
    double c4_;
    double c5_;

    double xmdot_;
    double omgdot_;
    double xnodot_;
    double xnodcf_;
    double t2cof_;
    double xlcof_;
    double aycof_;
    double x7thm1_;
    double omgcof_;
    double xmcof_;
    double delmo_;
    double sinmo_;

    double d2_;
    double d3_;
    double d4_;
    double t3cof_;
    double t4cof_;
    double t5cof_;

    double gsto_;

    bool use_simple_model_;
    bool use_deep_space_;
};

#endif