EOPHistory (ORbit Extrapolation KIT 11.2.1 API)

java.lang.Object
- org.orekit.frames.EOPHistory

All Implemented Interfaces:

Serializable
```
public class EOPHistory
extends Object
implements Serializable
```
This class loads any kind of Earth Orientation Parameter data throughout a large time range.

Author:

Pascal Parraud, Evan Ward

See Also:

Serialized Form

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`EOPHistory(IERSConventions conventions, Collection<? extends EOPEntry> data, boolean simpleEOP)` Simple constructor.
	`EOPHistory(IERSConventions conventions, Collection<? extends EOPEntry> data, boolean simpleEOP, TimeScales timeScales)` Simple constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`checkEOPContinuity(double maxGap)` Check Earth orientation parameters continuity.
`IERSConventions`	`getConventions()` Get the IERS conventions to which these EOP apply.
`AbsoluteDate`	`getEndDate()` Get the date of the last available Earth Orientation Parameters.
`List<EOPEntry>`	`getEntries()` Get a non-modifiable view of the EOP entries.
`double[]`	`getEquinoxNutationCorrection(AbsoluteDate date)` Get the correction to the nutation parameters for equinox-based paradigm.
`<T extends CalculusFieldElement<T>> T[]`	`getEquinoxNutationCorrection(FieldAbsoluteDate<T> date)` Get the correction to the nutation parameters for equinox-based paradigm.
`ITRFVersion`	`getITRFVersion(AbsoluteDate date)` Get the ITRF version.
`double`	`getLOD(AbsoluteDate date)` Get the LoD (Length of Day) value.
`<T extends CalculusFieldElement<T>> T`	`getLOD(FieldAbsoluteDate<T> date)` Get the LoD (Length of Day) value.
`protected Stream<EOPEntry>`	`getNeighbors(AbsoluteDate central)` Get the entries surrounding a central date.
`EOPHistory`	`getNonInterpolatingEOPHistory()` Get non-interpolating version of the instance.
`double[]`	`getNonRotatinOriginNutationCorrection(AbsoluteDate date)` Get the correction to the nutation parameters for Non-Rotating Origin paradigm.
`<T extends CalculusFieldElement<T>> T[]`	`getNonRotatinOriginNutationCorrection(FieldAbsoluteDate<T> date)` Get the correction to the nutation parameters for Non-Rotating Origin paradigm.
`PoleCorrection`	`getPoleCorrection(AbsoluteDate date)` Get the pole IERS Reference Pole correction.
`<T extends CalculusFieldElement<T>> FieldPoleCorrection<T>`	`getPoleCorrection(FieldAbsoluteDate<T> date)` Get the pole IERS Reference Pole correction.
`AbsoluteDate`	`getStartDate()` Get the date of the first available Earth Orientation Parameters.
`TimeScales`	`getTimeScales()` Get the time scales used in computing EOP corrections.
`double`	`getUT1MinusUTC(AbsoluteDate date)` Get the UT1-UTC value.
`<T extends CalculusFieldElement<T>> T`	`getUT1MinusUTC(FieldAbsoluteDate<T> date)` Get the UT1-UTC value.
`protected boolean`	`hasDataFor(AbsoluteDate date)` Check if the cache has data for the given date using `getStartDate()` and `getEndDate()`.
`boolean`	`isSimpleEop()` Determine if this history uses simplified EOP corrections.
`boolean`	`usesInterpolation()` Check if the instance uses interpolation on tidal corrections.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - EOPHistory
```
@DefaultDataContext
protected EOPHistory(IERSConventions conventions,
                                         Collection<? extends EOPEntry> data,
                                         boolean simpleEOP)
```
    Simple constructor.
    This method uses the default data context.
    
    Parameters:
    
    conventions - IERS conventions to which EOP refers
    
    data - the EOP data to use
    
    simpleEOP - if true, tidal effects are ignored when interpolating EOP
    
    See Also:
    
    EOPHistory(IERSConventions, Collection, boolean, TimeScales)
  - EOPHistory
```
public EOPHistory(IERSConventions conventions,
                  Collection<? extends EOPEntry> data,
                  boolean simpleEOP,
                  TimeScales timeScales)
```
    Simple constructor.
    
    Parameters:
    
    conventions - IERS conventions to which EOP refers
    
    data - the EOP data to use
    
    simpleEOP - if true, tidal effects are ignored when interpolating EOP
    
    timeScales - to use when computing EOP corrections.
    
    Since:
    
    10.1
- Method Detail
  - isSimpleEop
```
public boolean isSimpleEop()
```
    Determine if this history uses simplified EOP corrections.
    
    Returns:
    
    true if tidal corrections are ignored, false otherwise.
  - getTimeScales
```
public TimeScales getTimeScales()
```
    Get the time scales used in computing EOP corrections.
    
    Returns:
    
    set of time scales.
    
    Since:
    
    10.1
  - getNonInterpolatingEOPHistory
```
public EOPHistory getNonInterpolatingEOPHistory()
```
    Get non-interpolating version of the instance.
    
    Returns:
    
    non-interpolatig version of the instance
  - usesInterpolation
```
public boolean usesInterpolation()
```
    Check if the instance uses interpolation on tidal corrections.
    
    Returns:
    
    true if the instance uses interpolation on tidal corrections
  - getConventions
```
public IERSConventions getConventions()
```
    Get the IERS conventions to which these EOP apply.
    
    Returns:
    
    IERS conventions to which these EOP apply
  - getStartDate
```
public AbsoluteDate getStartDate()
```
    Get the date of the first available Earth Orientation Parameters.
    
    Returns:
    
    the start date of the available data
  - getEndDate
```
public AbsoluteDate getEndDate()
```
    Get the date of the last available Earth Orientation Parameters.
    
    Returns:
    
    the end date of the available data
  - getUT1MinusUTC
```
public double getUT1MinusUTC(AbsoluteDate date)
```
    Get the UT1-UTC value.
    The data provided comes from the IERS files. It is smoothed data.
    
    Parameters:
    
    date - date at which the value is desired
    
    Returns:
    
    UT1-UTC in seconds (0 if date is outside covered range)
  - getUT1MinusUTC
```
public <T extends CalculusFieldElement<T>> T getUT1MinusUTC(FieldAbsoluteDate<T> date)
```
    Get the UT1-UTC value.
    The data provided comes from the IERS files. It is smoothed data.
    
    Type Parameters:
    
    T - type of the field elements
    
    Parameters:
    
    date - date at which the value is desired
    
    Returns:
    
    UT1-UTC in seconds (0 if date is outside covered range)
    
    Since:
    
    9.0
  - getNeighbors
```
protected Stream<EOPEntry> getNeighbors(AbsoluteDate central)
```
    Get the entries surrounding a central date.
    See hasDataFor(AbsoluteDate) to determine if the cache has data for central without throwing an exception.
    
    Parameters:
    
    central - central date
    
    Returns:
    
    array of cached entries surrounding specified date
  - getLOD
```
public double getLOD(AbsoluteDate date)
```
    Get the LoD (Length of Day) value.
    The data provided comes from the IERS files. It is smoothed data.
    
    Parameters:
    
    date - date at which the value is desired
    
    Returns:
    
    LoD in seconds (0 if date is outside covered range)
  - getLOD
```
public <T extends CalculusFieldElement<T>> T getLOD(FieldAbsoluteDate<T> date)
```
    Get the LoD (Length of Day) value.
    The data provided comes from the IERS files. It is smoothed data.
    
    Type Parameters:
    
    T - type of the filed elements
    
    Parameters:
    
    date - date at which the value is desired
    
    Returns:
    
    LoD in seconds (0 if date is outside covered range)
    
    Since:
    
    9.0
  - getPoleCorrection
```
public PoleCorrection getPoleCorrection(AbsoluteDate date)
```
    Get the pole IERS Reference Pole correction.
    The data provided comes from the IERS files. It is smoothed data.
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    pole correction (PoleCorrection.NULL_CORRECTION if date is outside covered range)
  - getPoleCorrection
```
public <T extends CalculusFieldElement<T>> FieldPoleCorrection<T> getPoleCorrection(FieldAbsoluteDate<T> date)
```
    Get the pole IERS Reference Pole correction.
    The data provided comes from the IERS files. It is smoothed data.
    
    Type Parameters:
    
    T - type of the field elements
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    pole correction (PoleCorrection.NULL_CORRECTION if date is outside covered range)
  - getEquinoxNutationCorrection
```
public double[] getEquinoxNutationCorrection(AbsoluteDate date)
```
    Get the correction to the nutation parameters for equinox-based paradigm.
    The data provided comes from the IERS files. It is smoothed data.
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    nutation correction in longitude ΔΨ and in obliquity Δε (zero if date is outside covered range)
  - getEquinoxNutationCorrection
```
public <T extends CalculusFieldElement<T>> T[] getEquinoxNutationCorrection(FieldAbsoluteDate<T> date)
```
    Get the correction to the nutation parameters for equinox-based paradigm.
    The data provided comes from the IERS files. It is smoothed data.
    
    Type Parameters:
    
    T - type of the field elements
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    nutation correction in longitude ΔΨ and in obliquity Δε (zero if date is outside covered range)
  - getNonRotatinOriginNutationCorrection
```
public double[] getNonRotatinOriginNutationCorrection(AbsoluteDate date)
```
    Get the correction to the nutation parameters for Non-Rotating Origin paradigm.
    The data provided comes from the IERS files. It is smoothed data.
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    nutation correction in Celestial Intermediat Pole coordinates δX and δY (zero if date is outside covered range)
  - getNonRotatinOriginNutationCorrection
```
public <T extends CalculusFieldElement<T>> T[] getNonRotatinOriginNutationCorrection(FieldAbsoluteDate<T> date)
```
    Get the correction to the nutation parameters for Non-Rotating Origin paradigm.
    The data provided comes from the IERS files. It is smoothed data.
    
    Type Parameters:
    
    T - type of the filed elements
    
    Parameters:
    
    date - date at which the correction is desired
    
    Returns:
    
    nutation correction in Celestial Intermediat Pole coordinates δX and δY (zero if date is outside covered range)
  - getITRFVersion
```
public ITRFVersion getITRFVersion(AbsoluteDate date)
```
    Get the ITRF version.
    
    Parameters:
    
    date - date at which the value is desired
    
    Returns:
    
    ITRF version of the EOP covering the specified date
    
    Since:
    
    9.2
  - checkEOPContinuity
```
public void checkEOPContinuity(double maxGap)
```
    Check Earth orientation parameters continuity.
    
    Parameters:
    
    maxGap - maximal allowed gap between entries (in seconds)
  - hasDataFor
```
protected boolean hasDataFor(AbsoluteDate date)
```
    Check if the cache has data for the given date using getStartDate() and getEndDate().
    
    Parameters:
    
    date - the requested date
    
    Returns:
    
    true if the cache has data for the requested date, false otherwise.
  - getEntries
```
public List<EOPEntry> getEntries()
```
    Get a non-modifiable view of the EOP entries.
    
    Returns:
    
    non-modifiable view of the EOP entries

Class EOPHistory

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

EOPHistory

EOPHistory

Method Detail

isSimpleEop

getTimeScales

getNonInterpolatingEOPHistory

usesInterpolation

getConventions

getStartDate

getEndDate

getUT1MinusUTC

getUT1MinusUTC

getNeighbors

getLOD

getLOD

getPoleCorrection

getPoleCorrection

getEquinoxNutationCorrection

getEquinoxNutationCorrection

getNonRotatinOriginNutationCorrection

getNonRotatinOriginNutationCorrection

getITRFVersion

checkEOPContinuity

hasDataFor

getEntries