[time-nuts] You will be aware of the three different definitions of sunset, of course.
holrum at hotmail.com
Wed Aug 31 12:02:13 EDT 2016
> You will be aware of the three different definitions of sunset, of course.
Actually 5... Physical, Official, Civil, Natutical, and Astronomical. Plus Lady Heather lets you specify an arbitrary horizon angle.
> It calculates positions for the moon as well.
Lady Heather also does the moon. Calculates the moon position, illumination percentage, and draws the moon on the analog watch display. The sun is shown on the watch display and the satellite position map. Internally, the sun is treated as a satellite (with PRN number 256).
People have been using Lady Heather's sun info for doing things like disabling satellite tracking of satellites near the sun. The moon info has been used for things like moon bounce communications and ranging experiments.
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