Package org.orekit.time

Class UTCTAIOffset

java.lang.Object
org.orekit.time.UTCTAIOffset
All Implemented Interfaces:
Serializable, TimeStamped
public class UTCTAIOffset extends Object implements TimeStamped, Serializable
Offset between UTC and TAI time scales.

The UTC and TAI time scales are two scales offset with respect to each other. The TAI scale is continuous whereas the UTC includes some discontinuity when leap seconds are introduced by the International Earth Rotation Service (IERS).

This class represents the offset between the two scales that is valid between two leap seconds occurrences. It handles both the linear offsets used from 1961-01-01 to 1971-12-31 and the constant integer offsets used since 1972-01-01.

Author:
Luc Maisonobe
See Also:

  • Method Details

    • getDate

      public AbsoluteDate getDate()
      Get the date of the start of the leap.
      Specified by:
      getDate in interface TimeStamped
      Returns:
      date of the start of the leap
      See Also:

    • getMJD

      public int getMJD()
      Get the date of the start of the leap as Modified Julian Day.
      Returns:
      date of the start of the leap as Modified Julian Day

    • getValidityStart

      public AbsoluteDate getValidityStart()
      Get the start time of validity for this offset.

      The start of the validity of the offset is getLeap() seconds after the start of the leap itself.

      Returns:
      start of validity date
      See Also:

    • getLeap

      public TimeOffset getLeap()
      Get the value of the leap at offset validity start.
      Returns:
      value of the leap at offset validity start

    • getOffset

      public TimeOffset getOffset(AbsoluteDate date)
      Get the TAI - UTC offset in seconds.
      Parameters:
      date - date at which the offset is requested
      Returns:
      TAI - UTC offset in seconds.

    • getOffset

      public <T extends CalculusFieldElement<T>> T getOffset(FieldAbsoluteDate<T> date)
      Get the TAI - UTC offset in seconds.
      Type Parameters:
      T - type of the filed elements
      Parameters:
      date - date at which the offset is requested
      Returns:
      TAI - UTC offset in seconds.
      Since:
      9.0

    • getOffset

      public TimeOffset getOffset(DateComponents date, TimeComponents time)
      Get the TAI - UTC offset in seconds.
      Parameters:
      date - date components (in UTC) at which the offset is requested
      time - time components (in UTC) at which the offset is requested
      Returns:
      TAI - UTC offset in seconds.