mdoland
asked on
Where does the sun go up/down during summer Solstice, winter solstice and Equinox
I have a problem I can't get straight. I wonder when the sun goes up and down during these three occurences:
-summer Solstice (decl = +23.4 deg)
-winter solstice (decl = -23.4 deg)
-equinox (decl = 0 deg)
Ths formula should hold:
tan(Az) = sin(H) / ( cos(H) * sin(lat) - tan(decl) * cos(lat) )
where:
Az = the angel (see below)
lat = latitude ( go with lat = 59.33 here)
decl= declination angel of the sun
cos(H) = - tan(decl) * tan(lat)
H = "hour angel"
North = 0 deg
East = 90 deg
South = 180 deg
West = 270 deg
I seem to get bad values when I do this. Culd someone calculate this 6 valus for me?
up/down for +23.4 / 0 / -23.4
-summer Solstice (decl = +23.4 deg)
-winter solstice (decl = -23.4 deg)
-equinox (decl = 0 deg)
Ths formula should hold:
tan(Az) = sin(H) / ( cos(H) * sin(lat) - tan(decl) * cos(lat) )
where:
Az = the angel (see below)
lat = latitude ( go with lat = 59.33 here)
decl= declination angel of the sun
cos(H) = - tan(decl) * tan(lat)
H = "hour angel"
North = 0 deg
East = 90 deg
South = 180 deg
West = 270 deg
I seem to get bad values when I do this. Culd someone calculate this 6 valus for me?
up/down for +23.4 / 0 / -23.4
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
.
This page has formulae for calculating the sun's position:
http://aa.usno.navy.mil/faq/docs/SunApprox.php
Angles have degrees. Angels have wings.