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determine sunrise and sunset
sunset, sunrise, daylength based on the formulas
of Jean Meeus - NOAA(National Oceanic and Atmospheric Administration)
for a by the user given date and location (longitude and latitude)
Longitude (W = - , E = +)(enter zeros, if any!):
Latitude (S= - , N = + , equator=0)(enter zeros, if any!):
today xday xx/xx/xxxx
julian day 0
julian century 0
geometric mean longitude of the sun (degrees) 0
geometric mean anomaly of the sun (degrees) 0
eccentricity of the earth's orbit 0
equation of the center of the sun 0
true longitude of the sun (degrees) 0
true anomaly of the sun (degrees) 0
radial vector of the sun (AU) 0
longitude of the sun appearance (degrees) 0
mean ecliptic obliquety (degrees) 0
obliquety correction (degrees) 0
right ascension of the sun (degrees) 0
declination of the sun (degrees) 0
variation y 0
equivalent of time (minutes) 0
hour angle sunrise (degrees) 0
solar noon (julian time) 0
sunrise (julian time expression) 0
sunset (julian time expression) 0
daylength (as difference between julian time expressions) 0
sunrise (local siderial time) 0 h 0 m 0 s
sunset (local siderial time) 0 h 0 m 0 s
daylength 0 h 0 m 0 s
Calculations are based on the formulas as published in "Astronomical Algorithms"
by author Jean Meeus. The calculation results are accurate up to 1 minute for
locations between +/- 72 degrees latitude and accurate up to 10 minutes outside these latitudinal degrees.
Due to variations in the atmospheric composition, pressure or temperature, the observations can vary
from the calculations. Calculations are valid between the year 1901 and 2099.
For years between -2000 up to and including 1900 and from 2100 up to 3000 deviations up to 3 minutes are possible.
Daylight saving time is not integrated. If required, the user should adapt the time zone values.