Approximate Solar Calculations 

by Matt Oltersdorf 2003 10 27 10:10 UTC
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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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