cds.astro
Class ICRS

java.lang.Object
  cds.astro.Astroframe
      cds.astro.ICRS

All Implemented Interfaces:

java.io.Serializable

public class ICRS
extends Astroframe

The ICRS frame (International Celestial Reference System) is defined by the Hipparcos mission. It is also named ICRF.

Author:

Francois Ochsenbein (CDS)

See Also:

Serialized Form

Field Summary

static java.lang.String

class_name Name of this firame.

Fields inherited from class cds.astro.Astroframe

base_epoch, ed_lat, ed_lon, epoch, hms, ICRSmatrix, name, precision

Constructor Summary

ICRS()
Instanciate an ICRS frame

ICRS(double epoch)
Instanciate an ICRS frame

ICRS(java.lang.String text)
Instanciate an ICRS frame

Method Summary

void	fromICRS(Coo coo) Convert the position from the ICRS frame.
void	fromICRS(double[] u) Convert the position from the ICRS frame.
void	toICRS(Coo coo) Convert the position to its ICRS equivalent.
void	toICRS(double[] u) Convert the position to its ICRS equivalent.
double[][]	toICRSmatrix() Get the conversion to ICRS matrix

Methods inherited from class cds.astro.Astroframe

equals, setFrameEpoch, setICRSmatrix, toString, toString

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

class_name

public static java.lang.String class_name

Name of this firame.

Constructor Detail

ICRS

public ICRS(double epoch)

Instanciate an ICRS frame

Parameters:

epoch - the default epoch, in Julian years

ICRS

public ICRS()

Instanciate an ICRS frame

ICRS

public ICRS(java.lang.String text)
     throws java.text.ParseException

Instanciate an ICRS frame

Parameters:

text - the default epoch, e.g. "J1991.25"

Throws:

java.text.ParseException

Method Detail

toICRSmatrix

public double[][] toICRSmatrix()

Get the conversion to ICRS matrix

Specified by:

toICRSmatrix in class Astroframe

Returns:

Indentity matrix

toICRS

public void toICRS(Coo coo)

Convert the position to its ICRS equivalent.

Overrides:

toICRS in class Astroframe

Parameters:

coo - on input the position in this frame; on ouput the ICRS

fromICRS

public void fromICRS(Coo coo)

Convert the position from the ICRS frame.

Overrides:

fromICRS in class Astroframe

Parameters:

coo - on input the ICRS position, on output its local equivalent

toICRS

public void toICRS(double[] u)

Convert the position to its ICRS equivalent.

Overrides:

toICRS in class Astroframe

Parameters:

u - a 6-vector

fromICRS

public void fromICRS(double[] u)

Convert the position from the ICRS frame.

Overrides:

fromICRS in class Astroframe

Parameters:

u - a 6-vector