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Description
Sorry but i find that the sun azimuth must plus 180 degree so:
function getAzimuth(H, phi, dec) {
return atan(sin(H), cos(H) * sin(phi) - tan(dec) * cos(phi));
}
must be:
function getAzimuth(H, phi, dec) {
return PI + atan(sin(H), cos(H) * sin(phi) - tan(dec) * cos(phi));
}