org.stellarium
Class SkyBright

java.lang.Object
  org.stellarium.SkyBright

public class SkyBright
extends java.lang.Object

Field Summary

private double	airMassMoon Air mass for the Moon
(package private) double	airMassSun Air mass for the Sun
(package private) double	bDaylight Daylight sky brightness
(package private) double	bMoon Moon brightness
(package private) double	bMoonTerm1
(package private) double	bNight Dark night brightness
(package private) double	bNightTerm
(package private) double	bTotal Total brightness
(package private) double	bTwilight Twilight brightness
(package private) double	bTwilightTerm
(package private) double	C3 Term for moon brightness computation
(package private) double	C4 Term for sky brightness computation
(package private) double	K Useful coef...
(package private) double	magMoon Moon magnitude
(package private) double	RA Something related with date
(package private) double	SN Snellen Ratio (20/20=1.0, good 20/10=2.0)

Constructor Summary

SkyBright()

Method Summary

double	getLuminance(double cosDistMoon, double cosDistSun, double cosDistZenith) Compute the luminance at the given position
void	setDate(int year, int month, double moonPhase)
void	setLoc(double latitude, double altitude, double temperature, double relativeHumidity)
void	setSunMoon(double cosDistMoonZenith, double cosDistSunZenith) Set the moon and sun zenith angular distance (cosin given) and precompute what can be

Methods inherited from class java.lang.Object

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

Field Detail

airMassMoon

private double airMassMoon

Air mass for the Moon

airMassSun

double airMassSun

Air mass for the Sun

bTotal

double bTotal

Total brightness

bNight

double bNight

Dark night brightness

bTwilight

double bTwilight

Twilight brightness

bDaylight

double bDaylight

Daylight sky brightness

bMoon

double bMoon

Moon brightness

magMoon

double magMoon

Moon magnitude

RA

double RA

Something related with date

K

double K

Useful coef...

C3

double C3

Term for moon brightness computation

C4

double C4

Term for sky brightness computation

SN

double SN

Snellen Ratio (20/20=1.0, good 20/10=2.0)

bNightTerm

double bNightTerm

bMoonTerm1

double bMoonTerm1

bTwilightTerm

double bTwilightTerm

Constructor Detail

SkyBright

public SkyBright()

Method Detail

setDate

public void setDate(int year,
                    int month,
                    double moonPhase)

Parameters:

year -

month - 1=Jan, 12=Dec

moonPhase - in radian 0=Full Moon, PI/2=First Quadrant/Last Quadran, PI=No Moon

setLoc

public void setLoc(double latitude,
                   double altitude,
                   double temperature,
                   double relativeHumidity)

setSunMoon

public void setSunMoon(double cosDistMoonZenith,
                       double cosDistSunZenith)

Set the moon and sun zenith angular distance (cosin given) and precompute what can be

Parameters:

cosDistMoonZenith -

cosDistSunZenith -

getLuminance

public double getLuminance(double cosDistMoon,
                           double cosDistSun,
                           double cosDistZenith)

Compute the luminance at the given position

Parameters:

cosDistMoon - Math.cos(angular distance between moon and the position)

cosDistSun - Math.cos(angular distance between sun and the position)

cosDistZenith - Math.cos(angular distance between zenith and the position)

Returns: