org.orekit.time

Class GalileoScale

java.lang.Object

org.orekit.time.GalileoScale

All Implemented Interfaces:

Serializable, TimeScale

public class GalileoScale
extends Object
implements TimeScale

Galileo system time scale.

By convention, TGST = UTC + 13s at Galileo epoch (1999-08-22T00:00:00Z).

This is intended to be accessed thanks to the TimeScalesFactory class, so there is no public constructor.

Galileo System Time and GPS time are very close scales. Without any errors, they should be identical. The offset between these two scales is the GGTO, it depends on the clocks used to realize the time scales. It is of the order of a few tens nanoseconds. This class does not implement this offset, so it is virtually identical to the GPS scale.

Author:

Luc Maisonobe

See Also:

AbsoluteDate, Serialized Form

Method Summary

Modifier and Type	Method and Description
String	getName() Get the name time scale.
double	offsetFromTAI(AbsoluteDate date) Get the offset to convert locations from TAIScale to instance.
<T extends RealFieldElement<T>> T	offsetFromTAI(FieldAbsoluteDate<T> date) Get the offset to convert locations from TAIScale to instance.
double	offsetToTAI(DateComponents date, TimeComponents time) Get the offset to convert locations from instance to TAIScale.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.time.TimeScale

getLeap, getLeap, insideLeap, insideLeap, minuteDuration, minuteDuration

Method Detail

offsetFromTAI

public double offsetFromTAI(AbsoluteDate date)

Get the offset to convert locations from TAIScale to instance.

Specified by:

offsetFromTAI in interface TimeScale

Parameters:

date - conversion date

Returns:

offset in seconds to add to a location in TAIScale time scale to get a location in instance time scale

See Also:

TimeScale.offsetToTAI(DateComponents, TimeComponents)

offsetFromTAI

public <T extends RealFieldElement<T>> T offsetFromTAI(FieldAbsoluteDate<T> date)

Get the offset to convert locations from TAIScale to instance.

Specified by:

offsetFromTAI in interface TimeScale

Type Parameters:

T - type of the filed elements

Parameters:

date - conversion date

Returns:

offset in seconds to add to a location in TAIScale time scale to get a location in instance time scale

See Also:

TimeScale.offsetToTAI(DateComponents, TimeComponents)

offsetToTAI

public double offsetToTAI(DateComponents date,
                          TimeComponents time)

Get the offset to convert locations from instance to TAIScale.

Specified by:

offsetToTAI in interface TimeScale

Parameters:

date - date location in the time scale

time - time location in the time scale

Returns:

offset in seconds to add to a location in instance time scale to get a location in TAIScale time scale

See Also:

TimeScale.offsetFromTAI(AbsoluteDate)

getName

public String getName()

Get the name time scale.

Specified by:

getName in interface TimeScale

Returns:

name of the time scale

toString

public String toString()

Overrides:

toString in class Object