Package org.orekit.time

Class LazyLoadedTimeScales

java.lang.Object
org.orekit.time.AbstractTimeScales
org.orekit.time.LazyLoadedTimeScales
All Implemented Interfaces:
TimeScales
public class LazyLoadedTimeScales extends AbstractTimeScales
An implementation of TimeScales that loads auxiliary data, leap seconds and UT1-UTC, when it is first accessed. The list of loaders may be modified before the first data access.
Since:
10.1
Author:
Luc Maisonobe, Evan Ward
See Also:

  • Constructor Details

    • LazyLoadedTimeScales

      public LazyLoadedTimeScales(LazyLoadedEop lazyLoadedEop)
      Create a new set of time scales with the given sources of auxiliary data. This constructor uses the same DataProvidersManager for the default EOP loaders and the default leap second loaders.
      Parameters:
      lazyLoadedEop - loads Earth Orientation Parameters for getUT1(IERSConventions, boolean).

  • Method Details

    • addUTCTAIOffsetsLoader

      public void addUTCTAIOffsetsLoader(UTCTAIOffsetsLoader loader)
      Add a loader for UTC-TAI offsets history files.
      Parameters:
      loader - custom loader to add
      Since:
      7.1
      See Also:

    • addDefaultUTCTAIOffsetsLoaders

      public void addDefaultUTCTAIOffsetsLoaders()
      Add the default loaders for UTC-TAI offsets history files (both IERS and USNO).

      The default loaders are TAIUTCDatFilesLoader that looks for a file named tai-utc.dat that must be in USNO format, UTCTAIHistoryFilesLoader that looks for a file named UTC-TAI.history that must be in the IERS format and AGILeapSecondFilesLoader that looks for a files named LeapSecond.dat that must be in AGI format. The UTCTAIBulletinAFilesLoader isnot added by default as it is not recommended. USNO warned us that the TAI-UTC data present in bulletin A was for convenience only and was not reliable, there have been errors in several bulletins regarding these data.

      Since:
      7.1
      See Also:

    • clearUTCTAIOffsetsLoaders

      public void clearUTCTAIOffsetsLoaders()
      Clear loaders for UTC-TAI offsets history files.
      Since:
      7.1
      See Also:

    • getTAI

      public TAIScale getTAI()
      Description copied from interface: TimeScales
      Get the International Atomic Time scale.
      Returns:
      International Atomic Time scale

    • getUTC

      public UTCScale getUTC()
      Description copied from interface: TimeScales
      Get the Universal Time Coordinate scale.
      Returns:
      Universal Time Coordinate scale

    • getUT1

      public UT1Scale getUT1(IERSConventions conventions, boolean simpleEOP)
      Description copied from interface: TimeScales
      Get the Universal Time 1 scale.
      Specified by:
      getUT1 in interface TimeScales
      Overrides:
      getUT1 in class AbstractTimeScales
      Parameters:
      conventions - IERS conventions for which EOP parameters will provide dUT1
      simpleEOP - if true, tidal effects are ignored when interpolating EOP
      Returns:
      Universal Time 1 scale
      See Also:

    • getEopHistory

      protected EOPHistory getEopHistory(IERSConventions conventions, boolean simpleEOP)
      Description copied from class: AbstractTimeScales
      Get the EOP history for the given conventions.
      Specified by:
      getEopHistory in class AbstractTimeScales
      Parameters:
      conventions - to use in computing the EOP history.
      simpleEOP - whether to ignore some small tidal effects.
      Returns:
      EOP history.

    • getUT1

      public UT1Scale getUT1(EOPHistory history)
      Get the Universal Time 1 scale.

      As this method allow associating any history with the time scale, it may involve large data sets. So this method does not cache the resulting UT1Scale instance, a new instance will be returned each time. In order to avoid wasting memory, calling AbstractTimeScales.getUT1(IERSConventions, boolean) with the single enumerate corresponding to the conventions may be a better solution. This method is made available only for expert use.

      Overrides:
      getUT1 in class AbstractTimeScales
      Parameters:
      history - EOP parameters providing dUT1 (may be null if no correction is desired)
      Returns:
      Universal Time 1 scale
      See Also:

    • getTT

      public TTScale getTT()
      Description copied from interface: TimeScales
      Get the Terrestrial Time scale.
      Returns:
      Terrestrial Time scale

    • getGST

      public GalileoScale getGST()
      Description copied from interface: TimeScales
      Get the Galileo System Time scale.
      Returns:
      Galileo System Time scale

    • getGLONASS

      public GLONASSScale getGLONASS()
      Description copied from interface: TimeScales
      Get the GLObal NAvigation Satellite System time scale.
      Returns:
      GLObal NAvigation Satellite System time scale

    • getQZSS

      public QZSSScale getQZSS()
      Description copied from interface: TimeScales
      Get the Quasi-Zenith Satellite System time scale.
      Returns:
      Quasi-Zenith Satellite System time scale

    • getGPS

      public GPSScale getGPS()
      Description copied from interface: TimeScales
      Get the Global Positioning System scale.
      Returns:
      Global Positioning System scale

    • getTCG

      public TCGScale getTCG()
      Description copied from interface: TimeScales
      Get the Geocentric Coordinate Time scale.
      Returns:
      Geocentric Coordinate Time scale

    • getTDB

      public TDBScale getTDB()
      Description copied from interface: TimeScales
      Get the Barycentric Dynamic Time scale.
      Returns:
      Barycentric Dynamic Time scale

    • getTCB

      public TCBScale getTCB()
      Description copied from interface: TimeScales
      Get the Barycentric Coordinate Time scale.
      Returns:
      Barycentric Coordinate Time scale

    • getGMST

      public GMSTScale getGMST(IERSConventions conventions, boolean simpleEOP)
      Description copied from interface: TimeScales
      Get the Greenwich Mean Sidereal Time scale.
      Specified by:
      getGMST in interface TimeScales
      Overrides:
      getGMST in class AbstractTimeScales
      Parameters:
      conventions - IERS conventions for which EOP parameters will provide dUT1
      simpleEOP - if true, tidal effects are ignored when interpolating EOP
      Returns:
      Greenwich Mean Sidereal Time scale

    • getNavIC

      public NavicScale getNavIC()
      Description copied from interface: TimeScales
      Get the Navigation with Indian Constellation time scale.
      Returns:
      Navigation with Indian Constellation time scale

    • getBDT

      public BDTScale getBDT()
      Description copied from interface: TimeScales
      Get the BeiDou Navigation Satellite System time scale.
      Returns:
      BeiDou Navigation Satellite System time scale