Solar Noon Sun Angle
Find the sun's elevation at solar noon for a latitude and date, plus the day length estimate, free online.
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Solar declination δ ≈ 23.44° × sin(360/365 × (284 + day of year)). The sun's elevation at solar noon is 90° − |latitude − δ|. A solar panel facing the equator is ideally tilted at about the latitude (or latitude ∓ 15° for summer/winter optimisation). Day length uses the sunrise equation.