qSolar angle = 90°
- (solar zenith angle)
qSolar angle = (90°
- latitude of the location) + solar declination
qExample
for Toronto (located at 44°N)
q In spring equinox (March 21)
q solar declination = 0°
q solar angle = (90° - 44°) + 0° = 46°
q In summer solstice (June 21)
q solar declination = 23.5°
q solar angle = (90° - 44°) + 23.5° = 69.5°
q In winter solstice (December 21)
q solar declination = -23.5°
q solar angle = (90° - 44°) + (-23.5°) = 22.5°
q