Sun Positions, Formulas, & Sundials
by Prof. Richard B. Goldstein
Providence College

Three sites of interest:

1. Sun Positions
  • enter any latitude, longitude, and date/time to find the sun's (approx.)
    position as altitude and azimuth
  • a Java output will show the sun's position for every hour of the day as
     well as the highest and lowest altitudes and the sunrise and sunset
2. Formulas
  • the formulas used, their derivation and explanation are given for the
    above site
3. Sundials
  • enter any latitude to find the sundial settings for each hour
  • formulas and their derivations are given
  • a Java output will show the actual horizontal sundial face

Notes:
  • The Java output has been tested to work in Java enabled browsers such as
    Internet Explorer 6.0, Netscape 7.01, and Sun Microsystems Hot Java 3.0.
    In addition because the output could take some time to form I recommend
    at least a 400 MHz processor.
  • Java is enabled for IE by Tools/Internet Options/Advanced (tab)/check Java
  • Java is enabled for Netscape by Edit/Preferences/Advanced/check Enable Java