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Fix #65547: Default value for sunrise/sunset zenith still wrong #3088

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Fix #65547: Default value for sunrise/sunset zenith still wrong #3088

wants to merge 1 commit into from

Commits on Feb 8, 2018

  1. Fix #65547: Default value for sunrise/sunset zenith still wrong 

    The value of the zenith angle to calculate sunrise and sunset times is
commonly defined as 90°50', and is "obtained by adding the average
apparent radius of the Sun (16') to the average amount of atmospheric
refraction at the horizon (34')", according to
http://aa.usno.navy.mil/faq/docs/RST_defs.php.

This value is also used for the Sunrise/Sunset Algorithm published in
the Almanac for Computers, 1990, see
https://web.archive.org/web/20161202180207/http://williams.best.vwh.net/sunrise_sunset_algorithm.htm.
    @cmb69
    cmb69 committed Feb 8, 2018
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