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Orbit.h

Go to the documentation of this file.

// $Id: Orbit.h,v 1.5 2001/10/18 03:30:16 srobinsn Exp $


#ifndef ORBIT_H
#define ORBIT_H

// Orbit
//
//
#include <utility>        // for STL pairs


class Orbit{
    
public:
    Orbit(double asclon = 0., double alt = 600., double inc = 28.5, double phs = 0.,
          double apitch = 0., double ayaw = 0., double aroll = 0.);
 
    double get_phase (double time) const;

    std::pair<double,double> coords(double time) const;

    virtual double latitude(double time) const;

    virtual double longitude(double time) const;

    virtual double pitch (double time) const;

    virtual double yaw (double time) const;

    virtual double roll (double time) const;

    virtual double phase (double time) const;

    void    inclination ( double inc );

    void    ascendingLon ( double asc );

    void    startphase ( double phi );
 
       
    inline double startphase() const;
    inline double period() const;
    inline double inclination() const;
    inline double altitude() const;
    inline double ascendingLon() const;

protected:
    // manipulation of the orbital parameters - defaults do nothing, however
    // subclasses may overload depending upon which orbital parameters they 
    // specify

    virtual void setlatitude ( double ) {}
    virtual void setlongitude ( double ) {}
    virtual void setpitch ( double ) {}
    virtual void setyaw ( double ) {}
    virtual void setroll ( double ) {}

    // friends - so that only the boss can manipulate this class
    friend class GPS;

private:
    double m_ascendingLon;   // longitude of ascending node (degrees)
    double m_inclination;    // orbit inclination (degrees)
    double m_altitude;       // altitude (km)
    double m_period;         // orbital period (minutes)
    double m_sini;           // sine of inclination angle
    double m_cosi;           // cosine of inclination angle
    double m_startphase;     // starting phase offset of the orbit
};

inline double Orbit::period() const {return m_period;}

inline double Orbit::inclination() const {return m_inclination;}

inline double Orbit::altitude() const {return m_altitude;}

inline double Orbit::ascendingLon() const {return m_ascendingLon;}

inline double Orbit::startphase () const {return m_startphase;}

#endif ORBIT_H

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