org.deegree_impl.services.wts.util
Class SunPosition

java.lang.Object
  org.deegree_impl.services.wts.util.SunPosition

public class SunPosition

extends java.lang.Object

Author:

Andreas Poth

Constructor Summary

SunPosition()

Method Summary

static double	calcHorizontalSunPosition(int hour, int minute) calculates the horizontal angle of the sun depending only on hour and minute!
static double	calcVerticalSunposition(double latitue, int year, int month, int date, int hour, int minute) calculates the solar altitude for given latitue, year, month, date, hour and minute
private static double	getDaySinceVernalEquinox(int year, int month, int date) caluculates for a given date the number of days since the last vernal equinox.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SunPosition

public SunPosition()

Method Detail

calcVerticalSunposition

public static double calcVerticalSunposition(double latitue,
                                             int year,
                                             int month,
                                             int date,
                                             int hour,
                                             int minute)

calculates the solar altitude for given latitue, year, month, date, hour and minute

Parameters:

latitue - latitue of the the viewers position

year - year of the observation (leap year?)

month - 1..12!

hour - 0..23

minute - 0..59

calcHorizontalSunPosition

public static double calcHorizontalSunPosition(int hour,
                                               int minute)

calculates the horizontal angle of the sun depending only on hour and minute! the date isn't required.

Parameters:

hour - 0..23

minute - 0..59

getDaySinceVernalEquinox

private static double getDaySinceVernalEquinox(int year,
                                               int month,
                                               int date)

caluculates for a given date the number of days since the last vernal equinox. (leap years are not considered yet)