com.kosherjava.zmanim.util.AstronomicalCalculator

com.kosherjava.zmanim.util.NOAACalculator

All Implemented Interfaces:: Cloneable

public class NOAACalculator extends AstronomicalCalculator

Implementation of sunrise and sunset methods to calculate astronomical times based on the NOAA algorithm. This calculator uses the Java algorithm based on the implementation by NOAA - National Oceanic and Atmospheric Administration's Surface Radiation Research Branch. NOAA's implementation is based on equations from Astronomical Algorithms by Jean Meeus. Added to the algorithm is an adjustment of the zenith to account for elevation. The algorithm can be found in the Wikipedia Sunrise Equation article.

Nested Class Summary

Nested Classes

Modifier and Type

Class

Description

protected static enum

NOAACalculator.SolarEvent

An enum to indicate what type of solar event (SUNRISE, SUNSET, NOON or MIDNIGHT) is being calculated. .
Field Summary

Fields

Modifier and Type

Field

Description

private static final double

JULIAN_DAY_JAN_1_2000

The Julian day of January 1, 2000, known as J2000.0.

private static final double

JULIAN_DAYS_PER_CENTURY

Julian days per century.
Constructor Summary

Constructors

Constructor

Description

NOAACalculator()

Default constructor of the NOAACalculator.
Method Summary

Modifier and Type

Method

Description

private double

adjustElevationForRefraction(double elevation)

Apply refraction adjustment to solar elevation.

String

getCalculatorName()

Returns the name of the algorithm.

private static double

getEarthOrbitEccentricity(double julianCenturies)

Return the unitless eccentricity of earth's orbit.

private static double

getEquationOfTime(double julianCenturies)

Return the Equation of Time - the difference between true solar time and mean solar time

private static double

getJulianCenturiesFromJulianDay(double julianDay)

Convert Julian day to centuries since J2000.0.

private static double

getJulianDay(LocalDate localDate)

Return the Julian day from a Java LocalDate.

private static double

getMeanObliquityOfEcliptic(double julianCenturies)

Returns the mean obliquity of the ecliptic (Axial tilt).

private static double

getObliquityCorrection(double julianCenturies)

Returns the corrected obliquity of the ecliptic (Axial tilt).

double

getSolarAzimuth(Instant instant, GeoLocation geoLocation)

Return the Solar Azimuth for the horizontal coordinate system at the given location at the given time.

double

getSolarElevation(Instant instant, GeoLocation geoLocation)

Return the Solar Elevation for the horizontal coordinate system at the given location at the given time.

private double

getSolarElevationAzimuth(Instant instant, GeoLocation geoLocation, boolean isAzimuth)

Return the Solar Elevation or Solar Azimuth at the given location and time.

private static double

getSolarNoonMidnightUTC(double julianDay, double longitude, NOAACalculator.SolarEvent solarEvent)

Return the Universal Coordinated Time (UTC) of the current day solar noon or the the upcoming midnight (about 12 hours after solar noon) of the given day at the given location on earth.

private static double

getSunApparentLongitude(double julianCenturies)

Return the apparent longitude of the sun.

private static double

getSunDeclination(double julianCenturies)

Return the declination of the sun.

private static double

getSunEquationOfCenter(double julianCenturies)

Returns the equation of center for the sun in degrees.

private static double

getSunGeometricMeanAnomaly(double julianCenturies)

Returns the Geometric Mean Anomaly of the Sun in degrees.

private static double

getSunGeometricMeanLongitude(double julianCenturies)

Returns the Geometric Mean Longitude of the Sun.

private static double

getSunHourAngle(double latitude, double solarDeclination, double zenith, NOAACalculator.SolarEvent solarEvent)

Return the hour angle of the sun in radians at for the latitude.

private static double

getSunRiseSetUTC(LocalDate localDate, double latitude, double longitude, double zenith, NOAACalculator.SolarEvent solarEvent)

Return the Universal Coordinated Time (UTC) of sunrise or sunset in minutes for the given day at the given location on earth.

private static double

getSunTrueLongitude(double julianCenturies)

Return the true longitude of the sun.

double

getTimeAtAzimuth(LocalDate localDate, GeoLocation geoLocation, double targetAzimuth)

Returns the time that the azimuth will occur for the date and location passed to this method.

double

getUTCMidnight(LocalDate localDate, GeoLocation geoLocation)

Return the Universal Coordinated Time (UTC) of solar midnight (UTC) for the given day at the given location.

double

getUTCNoon(LocalDate localDate, GeoLocation geoLocation)

Return the Universal Coordinated Time (UTC) of solar noon (UTC) for the given day at the given location.

double

getUTCSunrise(LocalDate dt, GeoLocation geoLocation, double zenith, boolean adjustForElevation)

A method that calculates UTC sunrise as well as any time based on an angle above or below sunrise.

private double

getUTCSunRiseSet(LocalDate localDate, GeoLocation geoLocation, double zenith, boolean adjustForElevation, NOAACalculator.SolarEvent solarEvent)

A method that calculates UTC sunrise or sunset as well as any time based on an angle above or below sunset and returns it as a double in 24-hour format. 5:45:00 AM will return 5.75.

double

getUTCSunset(LocalDate dt, GeoLocation geoLocation, double zenith, boolean adjustForElevation)

A method that calculates UTC sunset as well as any time based on an angle above or below sunset.

Methods inherited from class AstronomicalCalculator
acosDegrees, adjustZenith, asinDegrees, clone, cosDegrees, equals, getDefault, getEarthRadius, getElevationAdjustment, getRefraction, getSolarRadius, getSolarRadius, hashCode, isUseAstronomicApparentSolarRadius, setEarthRadius, setRefraction, setSolarRadius, setUseAstronomicApparentSolarRadius, sinDegrees, tanDegrees

Modifier and Type

Method

Description

protected static double

acosDegrees(double angle)

A helper method to retun the arc cosine in degrees.

(package private) double

adjustZenith(double zenith, double elevation, LocalDate localDate)

Adjusts the zenith of astronomical sunrise and sunset to account for solar refraction, solar radius and elevation.

protected static double

asinDegrees(double angle)

A helper method to retun the arc sine in degrees.

AstronomicalCalculator

clone()

protected static double

cosDegrees(double angle)

A helper method to retun the cosine in degrees.

boolean

equals(Object object)

static AstronomicalCalculator

getDefault()

Returns the default class for calculating sunrise and sunset.

double

getEarthRadius()

A method that returns the earth radius in KM.

(package private) double

getElevationAdjustment(double elevation)

Method to return the adjustment to the zenith required to account for the elevation.

double

getRefraction()

Method to get the refraction value to be used when calculating sunrise and sunset.

double

getSolarRadius()

Method to get the sun's radius.

static double

getSolarRadius(LocalDate date)

Return the Sun's apparent angular semi-diameter ("solar radius") for the given date, in degrees, suitable for passing to AstronomicalCalculator.setSolarRadius(double) for slightly more accurate sunrise / sunset times.

int

hashCode()

boolean

isUseAstronomicApparentSolarRadius()

Returns if useAstronomicApparentSolarRadius is true (the default) or false.

void

setEarthRadius(double earthRadius)

A method that allows setting the earth's radius.

void

setRefraction(double refraction)

A method to allow overriding the default refraction of the calculator.

void

setSolarRadius(double solarRadius)

Method to set the sun's radius.

void

setUseAstronomicApparentSolarRadius(boolean useAstronomicalApparentSolarRadius)

Sets if useAstronomicApparentSolarRadius should be true (the default) or false.

protected static double

sinDegrees(double angle)

A helper method to retun the sine in degrees.

protected static double

tanDegrees(double angle)

A helper method to retun the tan / tangent in degrees.

Methods inherited from class Object
finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Details
- JULIAN_DAY_JAN_1_2000
  private static final double JULIAN_DAY_JAN_1_2000
  
  The Julian day of January 1, 2000, known as J2000.0.
  
  See Also:
  
  Constant Field Values
- JULIAN_DAYS_PER_CENTURY
  private static final double JULIAN_DAYS_PER_CENTURY
  
  Julian days per century.
  
  See Also:
  
  Constant Field Values
Constructor Details
- NOAACalculator
  
  public NOAACalculator()
  
  Default constructor of the NOAACalculator.
Method Details
- getCalculatorName
  
  public String getCalculatorName()
  
  Description copied from class: AstronomicalCalculator
  
  Returns the name of the algorithm.
  
  Specified by:
  
  getCalculatorName in class AstronomicalCalculator
  
  Returns:
  
  the descriptive name of the algorithm.
- getUTCSunrise
  public double getUTCSunrise(LocalDate dt, GeoLocation geoLocation, double zenith, boolean adjustForElevation)
  
  Description copied from class: AstronomicalCalculator
  
  A method that calculates UTC sunrise as well as any time based on an angle above or below sunrise. This abstract method is implemented by the classes that extend this class.
  
  Specified by:
  
  getUTCSunrise in class AstronomicalCalculator
  
  Parameters:
  
  dt - The LocalDate representing the date to calculate sunrise for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  zenith - the azimuth below the vertical zenith of 90°. For sunrise typically the zenith used for the calculation uses geometric zenith of 90° and adjusts this slightly to account for solar refraction and the sun's radius. Another example would be AstronomicalCalendar.getBeginNauticalTwilight() that passes AstronomicalCalendar.NAUTICAL_ZENITH to this method.
  
  adjustForElevation - Should the time be adjusted for elevation
  
  Returns:
  
  The UTC time of sunrise in 24-hour format. 5:45:00 AM will return 5.75. If an error was encountered in the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  See Also:
  
  AstronomicalCalculator.getElevationAdjustment(double)
- getUTCSunset
  public double getUTCSunset(LocalDate dt, GeoLocation geoLocation, double zenith, boolean adjustForElevation)
  
  Description copied from class: AstronomicalCalculator
  
  A method that calculates UTC sunset as well as any time based on an angle above or below sunset. This abstract method is implemented by the classes that extend this class.
  
  Specified by:
  
  getUTCSunset in class AstronomicalCalculator
  
  Parameters:
  
  dt - The LocalDate> representing the date to calculate sunset for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  zenith - the azimuth below the vertical zenith of 90°. For sunset typically the zenith used for the calculation uses geometric zenith of 90° and adjusts this slightly to account for solar refraction and the sun's radius. Another example would be AstronomicalCalendar.getEndNauticalTwilight() that passes AstronomicalCalendar.NAUTICAL_ZENITH to this method.
  
  adjustForElevation - Should the time be adjusted for elevation
  
  Returns:
  
  The UTC time of sunset in 24-hour format. 5:45:00 AM will return 5.75. If an error was encountered in the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  See Also:
  
  AstronomicalCalculator.getElevationAdjustment(double)
- getUTCSunRiseSet
  private double getUTCSunRiseSet(LocalDate localDate, GeoLocation geoLocation, double zenith, boolean adjustForElevation, NOAACalculator.SolarEvent solarEvent)
  
  A method that calculates UTC sunrise or sunset as well as any time based on an angle above or below sunset and returns it as a double in 24-hour format. 5:45:00 AM will return 5.75.
  
  Parameters:
  
  localDate - Used to calculate day of year.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  zenith - the azimuth below the vertical zenith of 90°. For sunset typically the zenith used for the calculation uses geometric zenith of 90° and adjusts this slightly to account for solar refraction and the sun's radius. Another example would be AstronomicalCalendar.getEndNauticalTwilight() that passes AstronomicalCalendar.NAUTICAL_ZENITH to this method.
  
  adjustForElevation - Should the time be adjusted for elevation
  
  solarEvent - if the calculation is for NOAACalculator.SolarEvent.SUNRISE or NOAACalculator.SolarEvent.SUNSET
  
  Returns:
  
  The UTC time of sunrise or sunset in 24-hour format. 5:45:00 AM will return 5.75, while 5:45 PM will return 17.75. If an error was encountered in the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  See Also:
  
  AstronomicalCalculator.getElevationAdjustment(double)
- getJulianDay
  
  private static double getJulianDay(LocalDate localDate)
  
  Return the Julian day from a Java LocalDate.
  
  Parameters:
  
  localDate - The LocalDate
  
  Returns:
  
  the Julian day corresponding to the date Note: Number is returned for the start of the Julian day. Fractional days / time should be added later.
- getJulianCenturiesFromJulianDay
  
  private static double getJulianCenturiesFromJulianDay(double julianDay)
  
  Convert Julian day to centuries since J2000.0.
  
  Parameters:
  
  julianDay - the Julian Day to convert
  
  Returns:
  
  the centuries since 2000 Julian corresponding to the Julian Day
- getSunGeometricMeanLongitude
  
  private static double getSunGeometricMeanLongitude(double julianCenturies)
  
  Returns the Geometric Mean Longitude of the Sun.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the Geometric Mean Longitude of the Sun in degrees
- getSunGeometricMeanAnomaly
  
  private static double getSunGeometricMeanAnomaly(double julianCenturies)
  
  Returns the Geometric Mean Anomaly of the Sun in degrees.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the Geometric Mean Anomaly of the Sun in degrees
- getEarthOrbitEccentricity
  
  private static double getEarthOrbitEccentricity(double julianCenturies)
  
  Return the unitless eccentricity of earth's orbit.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the unitless eccentricity
- getSunEquationOfCenter
  
  private static double getSunEquationOfCenter(double julianCenturies)
  
  Returns the equation of center for the sun in degrees.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the equation of center for the sun in degrees
- getSunTrueLongitude
  
  private static double getSunTrueLongitude(double julianCenturies)
  
  Return the true longitude of the sun.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the sun's true longitude in degrees
- getSunApparentLongitude
  
  private static double getSunApparentLongitude(double julianCenturies)
  
  Return the apparent longitude of the sun.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  sun's apparent longitude in degrees
- getMeanObliquityOfEcliptic
  
  private static double getMeanObliquityOfEcliptic(double julianCenturies)
  
  Returns the mean obliquity of the ecliptic (Axial tilt).
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the mean obliquity in degrees
- getObliquityCorrection
  
  private static double getObliquityCorrection(double julianCenturies)
  
  Returns the corrected obliquity of the ecliptic (Axial tilt).
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the corrected obliquity in degrees
- getSunDeclination
  
  private static double getSunDeclination(double julianCenturies)
  
  Return the declination of the sun.
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  the sun's declination in degrees
- getEquationOfTime
  
  private static double getEquationOfTime(double julianCenturies)
  
  Return the Equation of Time - the difference between true solar time and mean solar time
  
  Parameters:
  
  julianCenturies - the number of Julian centuries since J2000.0.
  
  Returns:
  
  equation of time in minutes of time
- getSunHourAngle
  
  private static double getSunHourAngle(double latitude, double solarDeclination, double zenith, NOAACalculator.SolarEvent solarEvent)
  
  Return the hour angle of the sun in radians at for the latitude.
  
  Parameters:
  
  latitude - the latitude of observer in degrees
  
  solarDeclination - the declination angle of sun in degrees
  
  zenith - the zenith
  
  solarEvent - If the hour angle is for SUNRISE or SUNSET
  
  Returns:
  
  hour angle of sunrise in radians
- getSolarElevation
  
  public double getSolarElevation(Instant instant, GeoLocation geoLocation)
  
  Description copied from class: AstronomicalCalculator
  
  Return the Solar Elevation for the horizontal coordinate system at the given location at the given time. Can be negative if the sun is below the horizon. Not corrected for altitude.
  
  Specified by:
  
  getSolarElevation in class AstronomicalCalculator
  
  Parameters:
  
  instant - The instant to calculate the elevation for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  Returns:
  
  solar elevation in degrees. The horizon (calculated in a vacuum using the solar radius as the point)is 90°, civil twilight is 96° etc. This means that sunrise and sunset that do use refraction and are calculated from the upper limb of the sun will return about 0.8333°.
- getSolarAzimuth
  
  public double getSolarAzimuth(Instant instant, GeoLocation geoLocation)
  
  Description copied from class: AstronomicalCalculator
  
  Return the Solar Azimuth for the horizontal coordinate system at the given location at the given time. Not corrected for altitude. True south is 180°.
  
  Specified by:
  
  getSolarAzimuth in class AstronomicalCalculator
  
  Parameters:
  
  instant - The instant to calculate the azimuth for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  Returns:
  
  the solar azimuth in degrees. Astronomical midday would be 180° in the norther hemosphere and 0° in the southern hemosphere. Depending on the location and time of year, sunrise will have an azimuth of about 90° and sunset about 270°.
- getSolarElevationAzimuth
  private double getSolarElevationAzimuth(Instant instant, GeoLocation geoLocation, boolean isAzimuth)
  
  Return the Solar Elevation or Solar Azimuth at the given location and time. Can be negative if the sun is below the horizon. Elevation is based on sea-level and is not adjusted for altitude.
  
  Parameters:
  
  instant - date-time of calculation
  
  geoLocation - The location for calculating the elevation or azimuth.
  
  isAzimuth - true for azimuth, false for elevation
  
  Returns:
  
  solar elevation or azimuth in degrees.
  
  See Also:
  
  getSolarElevation(Instant, GeoLocation)
  
  getSolarAzimuth(Instant, GeoLocation)
- adjustElevationForRefraction
  
  private double adjustElevationForRefraction(double elevation)
  
  Apply refraction adjustment to solar elevation.
  
  Parameters:
  
  elevation - the elevation to adjust.
  
  Returns:
  
  the adjusted elevation.
- getUTCNoon
  public double getUTCNoon(LocalDate localDate, GeoLocation geoLocation)
  
  Return the Universal Coordinated Time (UTC) of solar noon (UTC) for the given day at the given location. The NOAACalculator, the default calculator implementation calculates true solar noon, something that can be calculated even in the Arctic / Antarctic where there may be no sunrise or sunset, while the SunTimesCalculator approximates it, calculating the time as halfway between sunrise and sunset, something that can't be calculated in Polar regions where there is no sunrise or sunset for part of the year. See The Definition of Chatzos for details on solar noon / midnight calculations.
  
  Specified by:
  
  getUTCNoon in class AstronomicalCalculator
  
  Parameters:
  
  localDate - The LocalDate representing the date to calculate noon for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  Returns:
  
  The UTC time of solar noon in 24-hour format. 1:45:00 PM will return 13.75. If an error was encountered in the the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  See Also:
  
  getSolarNoonMidnightUTC(double, double, SolarEvent)
- getUTCMidnight
  public double getUTCMidnight(LocalDate localDate, GeoLocation geoLocation)
  
  Return the Universal Coordinated Time (UTC) of solar midnight (UTC) for the given day at the given location. The NOAACalculator, the default calculator implementation calculates true solar midnight, something that can be calculated even in the Arctic / Antarctic where there may be no sunrise or sunset, while the SunTimesCalculator approximates it, calculating the time as 12 hours after halfway between sunrise and sunset, something that can't be calculated in Polar regions where there is no sunrise or sunset for part of the year. See The Definition of Chatzos for details on solar noon / midnight calculations.
  
  Specified by:
  
  getUTCMidnight in class AstronomicalCalculator
  
  Parameters:
  
  localDate - The LocalDate representing the date to calculate midnight for. The calculation will be for midnight at the end of the day passed in.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  Returns:
  
  The UTC time of solar midnight in in a 24-hour double format. 1:45:00 AM will return 1.75. If an error was encountered in the calculation (expected behavior for the SunTimesCalculator at times of the year in Polar regions), Double.NaN will be returned.
  
  See Also:
  
  getSolarNoonMidnightUTC(double, double, SolarEvent)
- getSolarNoonMidnightUTC
  private static double getSolarNoonMidnightUTC(double julianDay, double longitude, NOAACalculator.SolarEvent solarEvent)
  
  Return the Universal Coordinated Time (UTC) of the current day solar noon or the the upcoming midnight (about 12 hours after solar noon) of the given day at the given location on earth.
  
  Parameters:
  
  julianDay - The Julian day since J2000.0.
  
  longitude - The longitude of observer in degrees
  
  solarEvent - If the calculation is for NOON or MIDNIGHT
  
  Returns:
  
  The UTC time of sunset in 24-hour format. 12:45:00 AM will return 0.75 while 1:45:00 PM will return 13.75. If an error was encountered in the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  See Also:
  
  getUTCNoon(LocalDate, GeoLocation)
  
  getUTCMidnight(LocalDate, GeoLocation)
- getSunRiseSetUTC
  
  private static double getSunRiseSetUTC(LocalDate localDate, double latitude, double longitude, double zenith, NOAACalculator.SolarEvent solarEvent)
  
  Return the Universal Coordinated Time (UTC) of sunrise or sunset in minutes for the given day at the given location on earth.
  
  Parameters:
  
  localDate - The LocalDate.
  
  latitude - The latitude of observer in degrees
  
  longitude - Longitude of observer in degrees
  
  zenith - Zenith
  
  solarEvent - If the calculation is for SUNRISE or SUNSET
  
  Returns:
  
  The UTC time of sunrise or sunset in 24-hour format. 5:45:00 AM will return 5.75, while 5:45 PM will return 17.75. If an error was encountered in the calculation (expected behavior for some locations such as near the poles, Double.NaN will be returned.
  
  TODO:
  
  Possibly increase the number of passes for improved accuracy, especially in the Arctic areas.
- getTimeAtAzimuth
  
  public double getTimeAtAzimuth(LocalDate localDate, GeoLocation geoLocation, double targetAzimuth)
  
  Returns the time that the azimuth will occur for the date and location passed to this method. As an example, to know when the sun will be directly west, pass in an azimuth of 270°, and for directly east, pass in an azimuth of 90°. The current implementation in this class only supports azimuth values of 90° (directly east) or 270° (directly west) that are directly needed in this library for the ComprehensiveZmanimCalendar.getSunsetOrWesternmostSolarAzimuth() and ComprehensiveZmanimCalendar.getSunriseOrEasternmostSolarAzimuth().
  
  Specified by:
  
  getTimeAtAzimuth in class AstronomicalCalculator
  
  Parameters:
  
  localDate - The LocalDate representing the date to calculate the time of the azimuth for.
  
  geoLocation - The location information used for astronomical calculation of solar times.
  
  targetAzimuth - the azimuth to run the calculation for
  
  Returns:
  
  The UTC time that the azimuth will be reached in a 24-hour double format. 5:45:00 PM will return 17.75. If an error was encountered in the calculation (expected behavior for some dates at latitudes below 23.44°, a Double.NaN will be returned.
  
  Throws:
  
  IllegalArgumentException - if the azimuth is not 90° or 270°.
  
  TODO:
  
  complete the implementation for other azimuths. While not needed by this library, they may be of value to some projects. There will be edge cases where the azimuth will occur more than once a day when based on the equation of time, the day is shorter than 24 hours. In that case, the time for the first one will be returned.

Class NOAACalculator

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class AstronomicalCalculator

Methods inherited from class Object

Field Details

JULIAN_DAY_JAN_1_2000

JULIAN_DAYS_PER_CENTURY

Constructor Details

NOAACalculator

Method Details

getCalculatorName

getUTCSunrise

getUTCSunset

getUTCSunRiseSet

getJulianDay

getJulianCenturiesFromJulianDay

getSunGeometricMeanLongitude

getSunGeometricMeanAnomaly

getEarthOrbitEccentricity

getSunEquationOfCenter

getSunTrueLongitude

getSunApparentLongitude

getMeanObliquityOfEcliptic

getObliquityCorrection

getSunDeclination

getEquationOfTime

getSunHourAngle

getSolarElevation

getSolarAzimuth

getSolarElevationAzimuth

adjustElevationForRefraction

getUTCNoon

getUTCMidnight

getSolarNoonMidnightUTC

getSunRiseSetUTC

getTimeAtAzimuth