Sunrise/Sunset Algo
Latest update:
If you need to implement sunrise/sunset calculations having only a
latitude/longitude (& a particular date), look here.
If found that with zenith = 90.79 it gives the same rise/set numbers
as googling for "<location> sunrise".
Also be careful with defining your sin/asin et al. that should take
degrees & return degrees. For example:
let sin = (d) => Math.sin(d * (Math.PI / 180))
let asin = (d) => Math.asin(d) * (180/Math.PI)
I had to do the same while reviving an old timezone viewer
tktz to force it to work again on
Fedora 23. Of course I forgot that asin() returns radians & was
scratching my head over why I was getting phoney baloney numbers.
Tags: ойті
Authors: ag