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Z tangent formula
From: Bill B
Date: 2005 Feb 16, 17:52 -0500
From: Bill B
Date: 2005 Feb 16, 17:52 -0500
George
Regarding a formula you gave for finding azimuth:
"This formula is-
Tan Z = sin (hour-angle) / (cos (hour-angle) sin lat - cos lat tan dec)
and the rules for putting Z into the right quadrant, 0 to 360, clockwise
fron North, are-
If tan Z was negative, add 180 deg to Z. If hour-angle was less than 180
deg, add another 180 deg to Z."
By hour-angle I assume you mean local hour angle?
I was also having trouble sporting out the parenthesis. Should the formula
look like the following, if I let ha= (hour-angle)?
Tan Z = sine ha
_________________________________________
(cos ha * sin lat) - (cos lat * tan dec)
Thanks
Bill
