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Approximate Solar Calculations 

Month:    Date:        Local Time: h    min
Location:
Latitude
°
N>0, S<0
Local Time

= UT h

Longitude
°
E>0, W<0

Day of Year

Equation of Time

min

Declination

°

Solar Time Offset

min

Solar Time

h

Solar Hour Angle

°

Altitude

°

Azimuth Angle

°

Hour Angle Rise/Set

°

Sunrise 

h

Sunset 

h

Solar Noon

h

Click here for a PDF file of low accuracy solar position equations.
National Oceanic and Atmospheric Administration (NOAA)

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Last Modified: 2007, Oct 04

© 2001-2007 Jürgen Giesen