trick/trick_sims/SIM_sun

SIM_sun

The Simulation

SIM_sun is a simulation of the Sun's movement across the sky. Given the location (latitude, longitude) of an observer on the Earth, the timezone (offset from UTC), and a starting local time, this simulation calculates the position of the Sun in the sky over time.

Inputs

Variable	Type	Units
sun_predictor.sun.observer_latitude	double	d
sun_predictor.sun.observer_longitude	double	d
sun_predictor.sun.observer_offset_from_UTC	int	hr
sun_predictor.sun.local_time	CALENDAR_DATE	--

CALENDAR_DATE

Member	Type	Units
year	int	--
month	int	--
day	int	day
hour	int	hour
min	int	min
sec	double	s

Outputs

Variable	Type	Units
sun_predictor.sun.JD	double	day
sun_predictor.sun.right_ascension	double	d
sun_predictor.sun.declination	double	d
sun_predictor.sun.hour_angle	double	d
sun_predictor.sun.local_sidereal_time	double	s
sun_predictor.sun.sidereal_time_at_Greenwich	double	s
sun_predictor.sun.solar_azimuth	double	d
sun_predictor.sun.solar_elevation	double	d
sun_predictor.sun.local_time	CALENDAR_DATE	--
sun_predictor.sun.utc	CALENDAR_DATE	--

NOTE: 0 <= Solar Azimuth < 360 degrees. North = 0, East = 90, South = 180, West = 270.

###Scenarios

####RUN_Winter

####RUN_Summer

References

Meeus, Jean, (1998) "Astronomical Algorithms", Willmann-Bell, Inc. ISBN 0-943396-61-1.