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) |

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 |