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/*
* Copyright (C) 1991-2003 by John A. Magliacane KD2BD
* Copyright (C) 2003 by Jonathan Naylor G4KLX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef Sun_H
#define Sun_H
#include <wx/wx.h>
#include <wx/datetime.h>
const double f = 3.35281066474748E-3; // Flattening factor
const double secday = 8.6400E4; // Seconds per day
const double xkmper = 6.378137E3; // WGS 84 Earth radius km
const double omegaE = 1.00273790934; // Earth rotations/siderial day
const double AU = 1.49597870691E8; // Astronomical unit - km (IAU 76)
const double mfactor = 7.292115E-5;
typedef struct {
double lat;
double lon;
double alt;
double theta;
} geodetic_t;
typedef struct {
double x;
double y;
double z;
double w;
} vector_t;
class CSun {
public:
CSun();
virtual ~CSun();
virtual void findSun(double dayNum);
virtual double getAzimuth() const;
virtual double getElevation() const;
virtual double getRA() const;
virtual double getDec() const;
virtual double getRange() const;
virtual void setLocation(double latitude, double longitude, double height);
virtual double getDayNum(const wxDateTime& dateTime) const;
private:
double m_az;
double m_el;
double m_ra;
double m_dec;
double m_range;
geodetic_t m_obs;
void calculateSolarPosition(double time, vector_t& solar_vector) const;
void calculateLatLonAlt(double time, vector_t& pos, geodetic_t& geodetic) const;
void calculateObs(double time, vector_t& pos, vector_t& vel, geodetic_t& geodetic, vector_t& obsSet) const;
void calculateRADec(double time, vector_t& pos, vector_t& vel, geodetic_t& geodetic, vector_t& obsSet) const;
void calculateUserPosVel(double time, geodetic_t& geodetic, vector_t& obsPos, vector_t& obsVel) const;
void magnitude(vector_t& v) const;
double deltaET(double year) const;
double thetaGJD(double jd) const;
double modulus(double arg1, double arg2) const;
double dot(vector_t& v1, vector_t& v2) const;
double frac(double arg) const;
};
#endif
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