Sunset/Sunrise calculations

[jgab 1,957]

It's easy to get today's sunset/sunrise from the HC2, but a bit more difficult to calculate tomorrow's sunset/sunrise, dawn,dusk and altitude etc.

Here is a conversion of code from Jarmo Lammi that I recently needed in a project...

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Running prints this

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[10der 830]

another one (works more than 2y)

 

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@jgab

PS:  math.atan2 has been deprecated since LUA 5.3

Edited November 2, 2018 by 10der

[jgab 1,957]

So, why didn't  you post your code earlier so I didn't have do unnecessary coding 

This seems to be based on the United States Naval Observatory code that is floating around.

Seems to calculate the same values as the HC2.

It's interesting how sunset/sunrise varies depending on sources - looking at various websites gives values +/- a minute or two... guess they all use different algorithms.

Thanks/J

[10der 830]

yes 

\fibaro\usr\share\lua\5.2\common\lustrous.lua 

 

 

 

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