Package org.orekit.bodies

Class CelestialBodyFactory

java.lang.Object

org.orekit.bodies.CelestialBodyFactory

public class CelestialBodyFactory
extends Object

Factory class for bodies of the solar system.

The Sun, the Moon and the planets (including the Pluto dwarf planet) are provided by this factory. In addition, two important points are provided for convenience: the solar system barycenter and the Earth-Moon barycenter.

The underlying body-centered frames are either direct children of EME2000 (for Moon and Earth-Moon barycenter) or children from other body-centered frames. For example, the path from EME2000 to Jupiter-centered frame is: EME2000, Earth-Moon barycenter centered, solar system barycenter centered, Jupiter-centered. The defining transforms of these frames are combinations of simple linear translation/velocity transforms without any rotation. The frame axes are therefore always parallel to EME2000 frame axes.

The position of the bodies provided by this class are interpolated using the JPL DE 405/DE 406 ephemerides.

Author:

Luc Maisonobe

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EARTH	Predefined name for Earth.
static final String	EARTH_MOON	Predefined name for Earth-Moon barycenter.
static final String	JUPITER	Predefined name for Jupiter.
static final String	MARS	Predefined name for Mars.
static final String	MERCURY	Predefined name for Mercury.
static final String	MOON	Predefined name for Moon.
static final String	NEPTUNE	Predefined name for Neptune.
static final String	PLUTO	Predefined name for Pluto.
static final String	SATURN	Predefined name for Saturn.
static final String	SOLAR_SYSTEM_BARYCENTER	Predefined name for solar system barycenter.
static final String	SUN	Predefined name for Sun.
static final String	URANUS	Predefined name for Uranus.
static final String	VENUS	Predefined name for Venus.

Method Summary

Modifier and Type	Method	Description
static void	addCelestialBodyLoader(String name, CelestialBodyLoader loader)	Add a loader for celestial bodies.
static void	addDefaultCelestialBodyLoader(String supportedNames)	Add the default loaders for all predefined celestial bodies.
static void	addDefaultCelestialBodyLoader(String name, String supportedNames)	Add the default loaders for celestial bodies.
static void	clearCelestialBodyCache()	Clear all loaded celestial bodies.
static void	clearCelestialBodyCache(String name)	Clear the specified celestial body from the internal cache.
static void	clearCelestialBodyLoaders()	Clear loaders for all celestial bodies.
static void	clearCelestialBodyLoaders(String name)	Clear loaders for one celestial body.
static CelestialBody	getBody(String name)	Get a celestial body.
static LazyLoadedCelestialBodies	getCelestialBodies()	Get the instance of CelestialBodies that is called by the static methods in this class.
static CelestialBody	getEarth()	Get the Earth singleton body.
static CelestialBody	getEarthMoonBarycenter()	Get the Earth-Moon barycenter singleton bodies pair.
static CelestialBody	getJupiter()	Get the Jupiter singleton body.
static CelestialBody	getMars()	Get the Mars singleton body.
static CelestialBody	getMercury()	Get the Mercury singleton body.
static CelestialBody	getMoon()	Get the Moon singleton body.
static CelestialBody	getNeptune()	Get the Neptune singleton body.
static CelestialBody	getPluto()	Get the Pluto singleton body.
static CelestialBody	getSaturn()	Get the Saturn singleton body.
static CelestialBody	getSolarSystemBarycenter()	Get the solar system barycenter aggregated body.
static CelestialBody	getSun()	Get the Sun singleton body.
static CelestialBody	getUranus()	Get the Uranus singleton body.
static CelestialBody	getVenus()	Get the Venus singleton body.

Methods inherited from class java.lang.Object

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

Field Details

SOLAR_SYSTEM_BARYCENTER

public static final String SOLAR_SYSTEM_BARYCENTER

Predefined name for solar system barycenter.

See Also:

• getBody(String)
• Constant Field Values

SUN

public static final String SUN

Predefined name for Sun.

See Also:

• getBody(String)
• Constant Field Values

MERCURY

public static final String MERCURY

Predefined name for Mercury.

See Also:

• getBody(String)
• Constant Field Values

VENUS

public static final String VENUS

Predefined name for Venus.

See Also:

• getBody(String)
• Constant Field Values

EARTH_MOON

public static final String EARTH_MOON

Predefined name for Earth-Moon barycenter.

See Also:

• getBody(String)
• Constant Field Values

EARTH

public static final String EARTH

Predefined name for Earth.

See Also:

• getBody(String)
• Constant Field Values

MOON

public static final String MOON

Predefined name for Moon.

See Also:

• getBody(String)
• Constant Field Values

MARS

public static final String MARS

Predefined name for Mars.

See Also:

• getBody(String)
• Constant Field Values

JUPITER

public static final String JUPITER

Predefined name for Jupiter.

See Also:

• getBody(String)
• Constant Field Values

SATURN

public static final String SATURN

Predefined name for Saturn.

See Also:

• getBody(String)
• Constant Field Values

URANUS

public static final String URANUS

Predefined name for Uranus.

See Also:

• getBody(String)
• Constant Field Values

NEPTUNE

public static final String NEPTUNE

Predefined name for Neptune.

See Also:

• getBody(String)
• Constant Field Values

PLUTO

public static final String PLUTO

Predefined name for Pluto.

See Also:

• getBody(String)
• Constant Field Values

Method Details

getCelestialBodies

@DefaultDataContext
public static LazyLoadedCelestialBodies getCelestialBodies()

Get the instance of CelestialBodies that is called by the static methods in this class.

Returns:

the reference frames used by this factory.

addCelestialBodyLoader

@DefaultDataContext
public static void addCelestialBodyLoader(String name,
 CelestialBodyLoader loader)

Add a loader for celestial bodies.

Parameters:

name - name of the body (may be one of the predefined names or a user-defined name)

loader - custom loader to add for the body

See Also:

• addDefaultCelestialBodyLoader(String)
• clearCelestialBodyLoaders(String)
• clearCelestialBodyLoaders()

addDefaultCelestialBodyLoader

@DefaultDataContext
public static void addDefaultCelestialBodyLoader(String supportedNames)

Add the default loaders for all predefined celestial bodies.

Parameters:

supportedNames - regular expression for supported files names (may be null if the default JPL file names are used)

The default loaders look for DE405 or DE406 JPL ephemerides.

See Also:

• DE405 JPL ephemerides
• DE406 JPL ephemerides
• addCelestialBodyLoader(String, CelestialBodyLoader)
• addDefaultCelestialBodyLoader(String)
• clearCelestialBodyLoaders(String)
• clearCelestialBodyLoaders()

addDefaultCelestialBodyLoader

@DefaultDataContext
public static void addDefaultCelestialBodyLoader(String name,
 String supportedNames)

Add the default loaders for celestial bodies.

Parameters:

name - name of the body (if not one of the predefined names, the method does nothing)

supportedNames - regular expression for supported files names (may be null if the default JPL file names are used)

The default loaders look for DE405 or DE406 JPL ephemerides.

See Also:

• DE405 JPL ephemerides
• DE406 JPL ephemerides
• addCelestialBodyLoader(String, CelestialBodyLoader)
• addDefaultCelestialBodyLoader(String)
• clearCelestialBodyLoaders(String)
• clearCelestialBodyLoaders()

clearCelestialBodyLoaders

@DefaultDataContext
public static void clearCelestialBodyLoaders(String name)

Clear loaders for one celestial body.

Calling this method also clears the celestial body that has been loaded via this CelestialBodyLoader.

Parameters:

name - name of the body

See Also:

• addCelestialBodyLoader(String, CelestialBodyLoader)
• clearCelestialBodyLoaders()
• clearCelestialBodyCache(String)

clearCelestialBodyLoaders

@DefaultDataContext
public static void clearCelestialBodyLoaders()

Clear loaders for all celestial bodies.

Calling this method also clears all loaded celestial bodies.

See Also:

• addCelestialBodyLoader(String, CelestialBodyLoader)
• clearCelestialBodyLoaders(String)
• clearCelestialBodyCache()

clearCelestialBodyCache

@DefaultDataContext
public static void clearCelestialBodyCache(String name)

Clear the specified celestial body from the internal cache.

Parameters:

name - name of the body

clearCelestialBodyCache

@DefaultDataContext
public static void clearCelestialBodyCache()

Clear all loaded celestial bodies.

Calling this method will remove all loaded bodies from the internal cache. Subsequent calls to getBody(String) or similar methods will result in a reload of the requested body from the configured loader(s).

getSolarSystemBarycenter

@DefaultDataContext
public static CelestialBody getSolarSystemBarycenter()

Get the solar system barycenter aggregated body.

Both the inertially oriented frame and body oriented frame for this aggregated body are aligned with ICRF (and therefore also GCRF)

Returns:

solar system barycenter aggregated body

getSun

@DefaultDataContext
public static CelestialBody getSun()

Get the Sun singleton body.

Returns:

Sun body

getMercury

@DefaultDataContext
public static CelestialBody getMercury()

Get the Mercury singleton body.

Returns:

Sun body

getVenus

@DefaultDataContext
public static CelestialBody getVenus()

Get the Venus singleton body.

Returns:

Venus body

getEarthMoonBarycenter

@DefaultDataContext
public static CelestialBody getEarthMoonBarycenter()

Get the Earth-Moon barycenter singleton bodies pair.

Both the inertially oriented frame and body oriented frame for this bodies pair are aligned with ICRF (and therefore also GCRF)

Returns:

Earth-Moon barycenter bodies pair

getEarth

@DefaultDataContext
public static CelestialBody getEarth()

Get the Earth singleton body.

Returns:

Earth body

getMoon

@DefaultDataContext
public static CelestialBody getMoon()

Get the Moon singleton body.

Returns:

Moon body

getMars

@DefaultDataContext
public static CelestialBody getMars()

Get the Mars singleton body.

Returns:

Mars body

getJupiter

@DefaultDataContext
public static CelestialBody getJupiter()

Get the Jupiter singleton body.

Returns:

Jupiter body

getSaturn

@DefaultDataContext
public static CelestialBody getSaturn()

Get the Saturn singleton body.

Returns:

Saturn body

getUranus

@DefaultDataContext
public static CelestialBody getUranus()

Get the Uranus singleton body.

Returns:

Uranus body

getNeptune

@DefaultDataContext
public static CelestialBody getNeptune()

Get the Neptune singleton body.

Returns:

Neptune body

getPluto

@DefaultDataContext
public static CelestialBody getPluto()

Get the Pluto singleton body.

Returns:

Pluto body

getBody

@DefaultDataContext
public static CelestialBody getBody(String name)

Get a celestial body.

If no CelestialBodyLoader has been added by calling addCelestialBodyLoader or if clearCelestialBodyLoaders has been called afterwards, the addDefaultCelestialBodyLoader method will be called automatically, once with the default name for JPL DE ephemerides and once with the default name for IMCCE INPOP files.

Parameters:

name - name of the celestial body

Returns:

celestial body