com.mhuss.AstroLib
Class PlanetData

java.lang.Object
  com.mhuss.AstroLib.PlanetData

public class PlanetData
extends java.lang.Object

This class handles planetary motion calculations and conversions.

Field Summary

static double	AU
protected LocationElements	g_polarLEs
protected LocationElements	m_altAzLEs
protected double	m_centuries
protected double	m_declination
protected LocationElements	m_eclipticLEs
protected LocationElements	m_equatorialLEs
protected double	m_hourAngle
protected boolean	m_initComplete
protected double	m_jd
protected int	m_planet
protected LocationElements	m_polarLEs
protected double	m_rightAscension

Constructor Summary

PlanetData()
Default constructor.

PlanetData(int planet, double jd, double deltaT, ObsInfo oi)
Explicit (all parameters) constructor.

PlanetData(int planet, double jd, ObsInfo oi)

Method Summary

void	calc(int planet, double jd, double deltaT, ObsInfo oi) Calculate the data for a given planet, julian day, and location.
void	calc(int planet, double jd, double deltaT, ObsInfo oi, boolean topoc_Corr, boolean lightT_Corr) Calculate the data for a given planet, julian day, and location.
void	calc(int planet, double jd, ObsInfo oi)
double	calcLon(int planet, double jd, ObsInfo oi) This calculates all LocationElements, then returns the longitude.
double	getAltAzLat() Get the Alt-Az latitude.
double	getAltAzLon() Get the Alt-Az longitude.
double	getAltAzRadius() Get the Alt-Az radius.
double	getDeclination() Get the declination in radians.
double	getEclipticLat() Get the ecliptic latitude.
double	getEclipticLon() Get the ecliptic longitude.
double	getEclipticRadius() Get the ecliptic radius.
LocationElements	getEclipticXYZ() Get the geocentric ecliptic cartesian Coords x, y, z.
double	getEquatorialLat() Get the equatorial latitude (y).
double	getEquatorialLon() Get the equatorial longitude (x).
double	getEquatorialRadius() Get the equatorial radius (z).
double	getPolarLat() Get the polar latitude.
double	getPolarLon() Get the polar longitude.
double	getPolarRadius() Get the polar radius.
double	getRightAscension() Get the right ascension in radians.
double	getSolarLat() Get the Solar ecliptic latitude in radians (Geocentric ecliptical coordinates of the Sun, usually close to zero)
double	getSolarLon() Get the geocentric ecliptic longitude of the Sun in radians
double	getSolarRadius() Get the solar radius of the Earth.
double	hourAngle() Get the hour angle.
double	jd() Get the Julian day number.
int	planet() Get the Planets number.
protected static void	TopocReductionEcl(double[] cartVec, double localSiderealTime, double latRad, double obliquity) Reduces cartesian ecliptical coordinates from geocentric to topocentric

Methods inherited from class java.lang.Object

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

Field Detail

AU

public static final double AU

See Also:

Constant Field Values

m_initComplete

protected boolean m_initComplete

m_planet

protected int m_planet

m_jd

protected double m_jd

m_centuries

protected double m_centuries

m_hourAngle

protected double m_hourAngle

m_rightAscension

protected double m_rightAscension

m_declination

protected double m_declination

g_polarLEs

protected LocationElements g_polarLEs

m_polarLEs

protected LocationElements m_polarLEs

m_eclipticLEs

protected LocationElements m_eclipticLEs

m_equatorialLEs

protected LocationElements m_equatorialLEs

m_altAzLEs

protected LocationElements m_altAzLEs

Constructor Detail

PlanetData

public PlanetData()

Default constructor.

PlanetData

public PlanetData(int planet,
                  double jd,
                  double deltaT,
                  ObsInfo oi)

Explicit (all parameters) constructor.

Parameters:

planet - Planet number (from Planets class)

jd - Julian day number

oi - Observer location

PlanetData

public PlanetData(int planet,
                  double jd,
                  ObsInfo oi)

Method Detail

calcLon

public double calcLon(int planet,
                      double jd,
                      ObsInfo oi)

This calculates all LocationElements, then returns the longitude.
Longitude is split out because it gets used most often.

Parameters:

planet - Planet number (from Planets class)

jd - Julian day number

oi - Observer location

calc

public void calc(int planet,
                 double jd,
                 double deltaT,
                 ObsInfo oi)

Calculate the data for a given planet, julian day, and location.
This function must be called (directly or via constructor) before calling any of the other functions in this class.

Parameters:

planet - Planet number (from Planets class)

jd - Julian day number

oi - Observer location

calc

public void calc(int planet,
                 double jd,
                 ObsInfo oi)

calc

public void calc(int planet,
                 double jd,
                 double deltaT,
                 ObsInfo oi,
                 boolean topoc_Corr,
                 boolean lightT_Corr)

Calculate the data for a given planet, julian day, and location.
This function must be called (directly or via constructor) before calling any of the other functions in this class.

Parameters:

planet - Planet number (from Planets class)

jd - Julian day number (tdt)

deltaT - (in Days)

oi - Observer location

topoc_Corr - correct topocentric

lightT_Corr - correct light time

TopocReductionEcl

protected static void TopocReductionEcl(double[] cartVec,
                                        double localSiderealTime,
                                        double latRad,
                                        double obliquity)

Reduces cartesian ecliptical coordinates from geocentric to topocentric

Parameters:

cartVec - equatorial

localSiderealTime - in radians

latRad - Latitude in radians

planet

public int planet()

Get the Planets number. Example: Planets.MERCURY

jd

public double jd()
          throws NoInitException

Get the Julian day number.

Throws:

NoInitException

hourAngle

public double hourAngle()
                 throws NoInitException

Get the hour angle.

Throws:

NoInitException

getPolarLat

public double getPolarLat()
                   throws NoInitException

Get the polar latitude. (Heliocentric polar coordinates)

Throws:

NoInitException

getPolarLon

public double getPolarLon()
                   throws NoInitException

Get the polar longitude. (Heliocentric polar coordinates)

Throws:

NoInitException

getPolarRadius

public double getPolarRadius()
                      throws NoInitException

Get the polar radius. (Distance to sun)

Throws:

NoInitException

getSolarLat

public double getSolarLat()
                   throws NoInitException

Get the Solar ecliptic latitude in radians (Geocentric ecliptical coordinates of the Sun, usually close to zero)

Throws:

NoInitException

getSolarLon

public double getSolarLon()
                   throws NoInitException

Get the geocentric ecliptic longitude of the Sun in radians

Throws:

NoInitException

getSolarRadius

public double getSolarRadius()
                      throws NoInitException

Get the solar radius of the Earth. (Distance Earth to Sun)

Throws:

NoInitException

getEclipticXYZ

public LocationElements getEclipticXYZ()
                                throws NoInitException

Get the geocentric ecliptic cartesian Coords x, y, z. Add. by Strickling

Throws:

NoInitException

getEclipticLat

public double getEclipticLat()
                      throws NoInitException

Get the ecliptic latitude. Mod. by Strickling, geocentric polar coordinates

Throws:

NoInitException

getEclipticLon

public double getEclipticLon()
                      throws NoInitException

Get the ecliptic longitude. Mod. by Strickling, geocentric polar coordinates in radians

Throws:

NoInitException

getEclipticRadius

public double getEclipticRadius()
                         throws NoInitException

Get the ecliptic radius. Mod. by Strickling, Distance to Earth

Throws:

NoInitException

getEquatorialLat

public double getEquatorialLat()
                        throws NoInitException

Get the equatorial latitude (y). Cartesian Coord-System

Throws:

NoInitException

getEquatorialLon

public double getEquatorialLon()
                        throws NoInitException

Get the equatorial longitude (x). Cartesian Coord-System

Throws:

NoInitException

getEquatorialRadius

public double getEquatorialRadius()
                           throws NoInitException

Get the equatorial radius (z). Cartesian Coord-System

Throws:

NoInitException

getAltAzLat

public double getAltAzLat()
                   throws NoInitException

Get the Alt-Az latitude. (Converted into polar coordinates)

Throws:

NoInitException

getAltAzLon

public double getAltAzLon()
                   throws NoInitException

Get the Alt-Az longitude. Radians, south is 0 deg (Converted into polar coordinates)

Throws:

NoInitException

getAltAzRadius

public double getAltAzRadius()
                      throws NoInitException

Get the Alt-Az radius. (Converted into polar coordinates)

Throws:

NoInitException

getRightAscension

public double getRightAscension()
                         throws NoInitException

Get the right ascension in radians.

Throws:

NoInitException

getDeclination

public double getDeclination()
                      throws NoInitException

Get the declination in radians.

Throws:

NoInitException