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#ifndef _CALENDAR_H_
#define _CALENDAR_H_
#include <iostream>
#include <string>
#include <ctime>
#include <vector>
#include <fstream>
#include <math.h>
using namespace std;
typedef struct tm Date;
extern double pi;
extern double delta;
class Julian
{
private:
static double d[23][5];
double dt_ext(int y,double jsd);
//计算力学时与世界时之差,传入年份
double delta_t(int y);
public:
// 计算儒略日
double getJulianDay(time_t time);
// 计算儒略千年数
double getJulianKiloYear(time_t time);
//儒略千年数转时间戳
time_t kiloYearToTime(double t,int year);
};
class parameter{
private:
// 计算地球日心黄经
double get_longitude(vector<double> l,double t);
// 计算地球日心黄纬
double get_latitude(vector<double> b,double t);
double get_R(vector<double> r,double t);
// 转换FK5误差，返回弧度制
double delta_FK5(double L,double B,double T);
//获取章动有关角
vector<double> get_angle(double T);
//章动修正
double nution(double T);
//光行差修正，返回弧度制
double aberration(double R);
// 获取地日运行参数，L为地球日心黄经，B为地球日心黄纬，R为地日距离
vector<vector<double>> get_parameters(double t);
public:
double sun_longitude(double t);
};
#endif
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