Class SunPositionCalculator

java.lang.Object
ext.plantuml.com.ctreber.acearth.util.SunPositionCalculator

public class SunPositionCalculator extends Object

Calculates the position of the point on Earth which is directly below the sun or the moon.

© 2002 Christian Treber, ct@ctreber.com

  • Constructor Details

    • SunPositionCalculator

      public SunPositionCalculator()
  • Method Details

    • getSunPositionOnEarth

      public static Coordinate getSunPositionOnEarth(long pMillis)

      Given a particular time (expressed in milliseconds since the unix epoch), compute position on the earth (lat, lon) such that sun is directly overhead.

      Verified.

      Parameters:
      pMillis - seconds since unix epoch
    • getMoonPositionOnEarth

      public static Coordinate getMoonPositionOnEarth(long pMillis)

      Given a particular time (expressed in milliseconds since the unix epoch), compute position on the earth (lat, lon) such that the moon is directly overhead. Based on duffett-smith **2nd ed** section 61; combines some steps into single expressions to reduce the number of extra variables.

      Verified.