I use sunrise and sunset for timing triggers, but I would like to open some Insteon control shades at midday + 1 hour?    I'm thinking midday should be '(sunset - sunrise)/2 + sunrise'.    Any ideas?

 

Jeff

 

I use sunrise and sunset for timing triggers, but I would like to open some Insteon control shades at midday + 1 hour? I'm thinking midday should be '(sunset - sunrise)/2 + sunrise'. Any ideas?

 

Jeff

You are looking for solar noon, which most PV fans are familiar with.

 

Your formula is right on, but you will find it never varies, season to season.

 

The longitudinal angle of the sun is always the same for the same time of day while the latitude angle changes.

 

Calculate it once and use it for a time trigger. For DST you may need to use a seasonal condition or two programs based on calendar calcs. Easy in v5.

Edited November 14, 20168 yr by larryllix

You could also use isylink/nodelink which gives you the sun's position in the sky...

 

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You could also use isylink/nodelink which gives you the sun's position in the sky...

 

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IIRC he would need V5 for nodelink also.

Yes but can use isylink with v4

 

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