Package org.orekit.time

Class UT1Scale

java.lang.Object

org.orekit.time.UT1Scale

All Implemented Interfaces:

TimeScale

public class UT1Scale
extends Object
implements TimeScale

Universal Time 1.

UT1 is a time scale directly linked to the actual rotation of the Earth. It is an irregular scale, reflecting Earth irregular rotation rate. The offset between UT1 and UTC is found in the Earth Orientation Parameters published by IERS.

Since:

5.1

Author:

Luc Maisonobe

See Also:

• AbsoluteDate

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	UT1Scale(EOPHistory eopHistory, UTCScale utc)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
EOPHistory	getEOPHistory()	Get the EOP history.
String	getName()	Get the name time scale.
UTCScale	getUTCScale()	Get the associated UTC scale.
TimeOffset	offsetFromTAI(AbsoluteDate date)	Get the offset to convert locations from TAIScale to instance.
<T extends CalculusFieldElement<T>> T	offsetFromTAI(FieldAbsoluteDate<T> date)	Get the offset to convert locations from TAIScale to instance.
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, offsetToTAI

Constructor Details

UT1Scale

protected UT1Scale(EOPHistory eopHistory,
 UTCScale utc)

Simple constructor.

Parameters:

eopHistory - user supplied EOP history (may be null)

utc - UTC time scale

Method Details

getUTCScale

public UTCScale getUTCScale()

Get the associated UTC scale.

Returns:

associated UTC scale.

Since:

9.1

getEOPHistory

public EOPHistory getEOPHistory()

Get the EOP history.

Returns:

eop history (may be null)

offsetFromTAI

public TimeOffset 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 CalculusFieldElement<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)

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