sunriset.h File Reference

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Macros
#define	TMOD(x)   ((x)<0?(x)+24:((x)>=24?(x)-24:(x)))
#define	DAYSOFF(x)   ((x)<0?"(-1) ":((x)>=24?"(+1) ":""))
#define	HOURS(h)   ((int)(floor(h)))
#define	MINUTES(h)   ((int)(60*(h-floor(h))))
#define	ABS(x)   ((x)<0?-(x):(x))
#define	days_since_2000_Jan_0(y, m, d)    (367L*(y)-((7*((y)+(((m)+9)/12)))/4)+((275*(m))/9)+(d)-730530L)
#define	PI   3.1415926535897932384
#define	RADEG   ( 180.0 / PI )
#define	DEGRAD   ( PI / 180.0 )
#define	sind(x)   sin((x)*DEGRAD)
#define	cosd(x)   cos((x)*DEGRAD)
#define	tand(x)   tan((x)*DEGRAD)
#define	atand(x)   (RADEG*atan(x))
#define	asind(x)   (RADEG*asin(x))
#define	acosd(x)   (RADEG*acos(x))
#define	atan2d(y, x)   (RADEG*atan2(y,x))
#define	day_length(year, month, day, lon, lat)    __daylen__( year, month, day, lon, lat, -50.0/60.0, 1 )
#define	day_civil_twilight_length(year, month, day, lon, lat)    __daylen__( year, month, day, lon, lat, -6.0, 0 )
#define	day_nautical_twilight_length(year, month, day, lon, lat)    __daylen__( year, month, day, lon, lat, -12.0, 0 )
#define	day_astronomical_twilight_length(year, month, day, lon, lat)    __daylen__( year, month, day, lon, lat, -18.0, 0 )
#define	sun_rise_set(year, month, day, lon, lat, rise, set)    __sunriset__( year, month, day, lon, lat, -35.0/60.0, 1, rise, set )
#define	civil_twilight(year, month, day, lon, lat, start, end)    __sunriset__( year, month, day, lon, lat, -6.0, 0, start, end )
#define	nautical_twilight(year, month, day, lon, lat, start, end)    __sunriset__( year, month, day, lon, lat, -12.0, 0, start, end )
#define	astronomical_twilight(year, month, day, lon, lat, start, end)    __sunriset__( year, month, day, lon, lat, -18.0, 0, start, end )

Functions
double	__daylen__ (int year, int month, int day, double lon, double lat, double altit, int upper_limb)
int	__sunriset__ (int year, int month, int day, double lon, double lat, double altit, int upper_limb, double *rise, double *set)
void	sunpos (double d, double *lon, double *r)
void	sun_RA_dec (double d, double *RA, double *dec, double *r)
double	revolution (double x)
double	rev180 (double x)
double	GMST0 (double d)

Variables
const char *	timezone_name
long int	timezone_offset

Macro Definition Documentation

ABS

#define ABS

(

x

)

((x)<0?-(x):(x))

acosd

#define acosd

(

x

)

(RADEG*acos(x))

asind

#define asind

(

x

)

(RADEG*asin(x))

astronomical_twilight

#define astronomical_twilight	(		year,
			month,
			day,
			lon,
			lat,
			start,
			end
	)		__sunriset__( year, month, day, lon, lat, -18.0, 0, start, end )

atan2d

#define atan2d	(		y,
			x
	)		(RADEG*atan2(y,x))

atand

#define atand

(

x

)

(RADEG*atan(x))

civil_twilight

#define civil_twilight	(		year,
			month,
			day,
			lon,
			lat,
			start,
			end
	)		__sunriset__( year, month, day, lon, lat, -6.0, 0, start, end )

cosd

#define cosd

(

x

)

cos((x)*DEGRAD)

day_astronomical_twilight_length

#define day_astronomical_twilight_length	(		year,
			month,
			day,
			lon,
			lat
	)		__daylen__( year, month, day, lon, lat, -18.0, 0 )

day_civil_twilight_length

#define day_civil_twilight_length	(		year,
			month,
			day,
			lon,
			lat
	)		__daylen__( year, month, day, lon, lat, -6.0, 0 )

day_length

#define day_length	(		year,
			month,
			day,
			lon,
			lat
	)		__daylen__( year, month, day, lon, lat, -50.0/60.0, 1 )

day_nautical_twilight_length

#define day_nautical_twilight_length	(		year,
			month,
			day,
			lon,
			lat
	)		__daylen__( year, month, day, lon, lat, -12.0, 0 )

days_since_2000_Jan_0

#define days_since_2000_Jan_0	(		y,
			m,
			d
	)		(367L*(y)-((7*((y)+(((m)+9)/12)))/4)+((275*(m))/9)+(d)-730530L)

DAYSOFF

#define DAYSOFF

(

x

)

((x)<0?"(-1) ":((x)>=24?"(+1) ":""))

DEGRAD

#define DEGRAD   ( PI / 180.0 )

HOURS

#define HOURS

(

h

)

((int)(floor(h)))

MINUTES

#define MINUTES

(

h

)

((int)(60*(h-floor(h))))

nautical_twilight

#define nautical_twilight	(		year,
			month,
			day,
			lon,
			lat,
			start,
			end
	)		__sunriset__( year, month, day, lon, lat, -12.0, 0, start, end )

PI

#define PI   3.1415926535897932384

RADEG

#define RADEG   ( 180.0 / PI )

sind

#define sind

(

x

)

sin((x)*DEGRAD)

sun_rise_set

#define sun_rise_set	(		year,
			month,
			day,
			lon,
			lat,
			rise,
			set
	)		__sunriset__( year, month, day, lon, lat, -35.0/60.0, 1, rise, set )

tand

#define tand

(

x

)

tan((x)*DEGRAD)

TMOD

#define TMOD

(

x

)

((x)<0?(x)+24:((x)>=24?(x)-24:(x)))

Function Documentation

__daylen__()

double __daylen__	(	int	year,
		int	month,
		int	day,
		double	lon,
		double	lat,
		double	altit,
		int	upper_limb
	)

References acosd, cosd, days_since_2000_Jan_0, lat, sind, and sunpos().

__sunriset__()

int __sunriset__	(	int	year,
		int	month,
		int	day,
		double	lon,
		double	lat,
		double	altit,
		int	upper_limb,
		double *	rise,
		double *	set
	)

References acosd, cosd, days_since_2000_Jan_0, GMST0(), lat, rev180(), revolution(), sind, and sun_RA_dec().

Referenced by navit_layout_switch().

GMST0()

double GMST0

(

double

d

)

References revolution().

Referenced by __sunriset__().

rev180()

double rev180

(

double

x

)

References INV360.

Referenced by __sunriset__().

revolution()

double revolution

(

double

x

)

References INV360.

Referenced by __sunriset__(), GMST0(), and sunpos().

sun_RA_dec()

void sun_RA_dec	(	double	d,
		double *	RA,
		double *	dec,
		double *	r
	)

References atan2d, cosd, sind, and sunpos().

Referenced by __sunriset__().

sunpos()

void sunpos	(	double	d,
		double *	lon,
		double *	r
	)

References atan2d, cosd, M, RADEG, revolution(), and sind.

Referenced by __daylen__(), and sun_RA_dec().

Variable Documentation

timezone_name

const char* timezone_name

extern

timezone_offset

long int timezone_offset

extern