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On 11/20/2010 5:48 PM, Leigh Palmer wrote:
/snip//snip/
Ignoring refraction, eccentricity and assuming a point Sun and spherical Earth, and using northern hemisphere nomenclature:
Let L = latitude
Let Q = obliquity of the ecliptic = 23°27'.
The declination of the Sun at the summer solstice is Q
The declination of the Sun at the winter solstice is -Q
The zenith angle of the Sun at the summer solstice is Zs = (L - Q)
The zenith angle of the Sun at the winter solstice is Zw = (L + Q)
LeighDid you intend to express the Solar Altitude
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at mid Summer as a zenith angle of 90 deg - (L-Q) ??
Brian W