net.time4j.calendar.astro

Class SunPosition

java.lang.Object

net.time4j.calendar.astro.SunPosition

All Implemented Interfaces:

java.io.Serializable

public class SunPosition
extends java.lang.Object
implements java.io.Serializable

Contains methods for calculating the position of the sun.

The position refers to the gemometric center of the sun.

Since:

3.38/4.33

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static SunPosition	at(Moment moment, GeoLocation location) Calculates the position of sun at given moment and geographical location.
boolean	equals(java.lang.Object obj)
double	getAzimuth() Obtains the azimuth of sun in degrees (compass orientation).
double	getDeclination() Obtains the declination of sun in degrees.
double	getElevation() Obtains the elevation of sun relative to the horizon in degrees.
double	getRightAscension() Obtains the right ascension of sun in degrees.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

at

public static SunPosition at(Moment moment,
                             GeoLocation location)

Calculates the position of sun at given moment and geographical location.

Parameters:

moment - the time when the position of sun is to be determined

location - geographical location of observer

Returns:

sun position

getRightAscension

public double getRightAscension()

Obtains the right ascension of sun in degrees.

Returns:

double

getDeclination

public double getDeclination()

Obtains the declination of sun in degrees.

Returns:

double

getAzimuth

public double getAzimuth()

Obtains the azimuth of sun in degrees (compass orientation).

The azimuth is the result of a coordinate transformation of right ascension and declination to the horizon system.

Returns:

azimuth in degrees measured from the north (compass orientation)

getElevation

public double getElevation()

Obtains the elevation of sun relative to the horizon in degrees.

The elevation is the result of a coordinate transformation of right ascension and declination to the horizon system.

Returns:

elevation in degrees (positive if above the horizon and negative if below the horizon)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object