org.orekit.time
Class TimeScalesFactory

java.lang.Object
  org.orekit.time.TimeScalesFactory

All Implemented Interfaces:

Serializable

public class TimeScalesFactory
extends Object
implements Serializable

Factory for predefined time scales.

This is a utility class, so its constructor is private.

Author:

Luc Maisonobe

See Also:

Serialized Form

Method Summary

static void	addDefaultUTCTAILoader() Add the default loader for UTC-TAI offsets history files.
static void	addUTCTAILoader(UTCTAILoader loader) Add a loader for UTC-TAI offsets history files.
static void	clearUTCTAILoaders() Clear loaders for UTC-TAI offsets history files.
static GMSTScale	getGMST() Get the Greenwich Mean Sidereal Time scale.
static GPSScale	getGPS() Get the Global Positioning System scale.
static GalileoScale	getGST() Get the Galileo System Time scale.
static TAIScale	getTAI() Get the International Atomic Time scale.
static TCBScale	getTCB() Get the Barycentric Coordinate Time scale.
static TCGScale	getTCG() Get the Geocentric Coordinate Time scale.
static TDBScale	getTDB() Get the Barycentric Dynamic Time scale.
static TTScale	getTT() Get the Terrestrial Time scale.
static UT1Scale	getUT1() Get the Universal Time 1 scale.
static UTCScale	getUTC() Get the Universal Time Coordinate scale.

Methods inherited from class java.lang.Object

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

Method Detail

addUTCTAILoader

public static void addUTCTAILoader(UTCTAILoader loader)

Add a loader for UTC-TAI offsets history files.

Parameters:

loader - custom loader to add

See Also:

getUTC(), clearUTCTAILoaders()

addDefaultUTCTAILoader

public static void addDefaultUTCTAILoader()

Add the default loader for UTC-TAI offsets history files.

The default loader looks for a file named UTC-TAI.history that must be in the IERS format.

See Also:

IERS UTC-TAI.history file, getUTC(), clearUTCTAILoaders()

clearUTCTAILoaders

public static void clearUTCTAILoaders()

Clear loaders for UTC-TAI offsets history files.

See Also:

getUTC(), addUTCTAILoader(UTCTAILoader), addDefaultUTCTAILoader()

getTAI

public static TAIScale getTAI()

Get the International Atomic Time scale.

Returns:

International Atomic Time scale

getUTC

public static UTCScale getUTC()
                       throws OrekitException

Get the Universal Time Coordinate scale.

If no UTCTAILoader has been added by calling addUTCTAILoader or if clearUTCTAILoaders has been called afterwards, the addDefaultUTCTAILoader method will be called automatically.

Returns:

Universal Time Coordinate scale

Throws:

OrekitException - if some data can't be read or some file content is corrupted

See Also:

addUTCTAILoader(UTCTAILoader), clearUTCTAILoaders(), addDefaultUTCTAILoader()

getUT1

public static UT1Scale getUT1()
                       throws OrekitException

Get the Universal Time 1 scale.

UT1 scale depends on both UTC scale and Earth Orientation Parameters, so this method loads these data sets. See the TimeScalesFactory.getUTC() and EOPHistoryFactory.getEOP2000History() methods for an explanation of how the corresponding data loaders can be configured.

Returns:

Universal Time 1 scale

Throws:

OrekitException - if some data can't be read or some file content is corrupted

See Also:

getUTC()

getTT

public static TTScale getTT()

Get the Terrestrial Time scale.

Returns:

Terrestrial Time scale

getGST

public static GalileoScale getGST()

Get the Galileo System Time scale.

Returns:

Galileo System Time scale

getGPS

public static GPSScale getGPS()

Get the Global Positioning System scale.

Returns:

Global Positioning System scale

getTCG

public static TCGScale getTCG()

Get the Geocentric Coordinate Time scale.

Returns:

Geocentric Coordinate Time scale

getTDB

public static TDBScale getTDB()

Get the Barycentric Dynamic Time scale.

Returns:

Barycentric Dynamic Time scale

getTCB

public static TCBScale getTCB()

Get the Barycentric Coordinate Time scale.

Returns:

Barycentric Coordinate Time scale

getGMST

public static GMSTScale getGMST()
                         throws OrekitException

Get the Greenwich Mean Sidereal Time scale.

Returns:

Greenwich Mean Sidereal Time scale

Throws:

OrekitException - if some data can't be read or some file content is corrupted