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

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

PredictedEOPHistory
```
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

Field Summary

Fields
Modifier and Type Field Description

static int DEFAULT_INTERPOLATION_DEGREE
Default interpolation degree.

Constructor Summary

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`cachesTidalCorrection()`	Check if the instance caches tidal corrections.
`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.
`EOPHistory`	`getEOPHistoryWithoutCachedTidalCorrection()`	Get version of the instance that does not cache tidal correction.
`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.
`int`	`getInterpolationDegree()`	Get interpolation degree.
`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, int n)`	Get the entries surrounding a central date.
`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.

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

- Field Detail
  - DEFAULT_INTERPOLATION_DEGREE
```
public static final int DEFAULT_INTERPOLATION_DEGREE
```
    Default interpolation degree.
    
    Since:
    
    12.0
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - EOPHistory
```
@DefaultDataContext
protected EOPHistory(IERSConventions conventions,
                     int interpolationDegree,
                     Collection<? extends EOPEntry> data,
                     boolean simpleEOP)
```
    Simple constructor.
    This method uses the default data context.
    
    Parameters:
    
    conventions - IERS conventions to which EOP refers
    
    interpolationDegree - interpolation degree (must be of the form 4k-1)
    
    data - the EOP data to use
    
    simpleEOP - if true, tidal effects are ignored when interpolating EOP
    
    See Also:
    
    EOPHistory(IERSConventions, int, Collection, boolean, TimeScales)
  - EOPHistory
```
public EOPHistory(IERSConventions conventions,
                  int interpolationDegree,
                  Collection<? extends EOPEntry> data,
                  boolean simpleEOP,
                  TimeScales timeScales)
```
    Simple constructor.
    
    Parameters:
    
    conventions - IERS conventions to which EOP refers
    
    interpolationDegree - interpolation degree (must be of the form 4k-1)
    
    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.
  - getInterpolationDegree
```
public int getInterpolationDegree()
```
    Get interpolation degree.
    
    Returns:
    
    interpolation degree
    
    Since:
    
    12.0
  - getTimeScales
```
public TimeScales getTimeScales()
```
    Get the time scales used in computing EOP corrections.
    
    Returns:
    
    set of time scales.
    
    Since:
    
    10.1
  - getEOPHistoryWithoutCachedTidalCorrection
```
public EOPHistory getEOPHistoryWithoutCachedTidalCorrection()
```
    Get version of the instance that does not cache tidal correction.
    
    Returns:
    
    version of the instance that does not cache tidal correction
    
    Since:
    
    12.0
  - cachesTidalCorrection
```
public boolean cachesTidalCorrection()
```
    Check if the instance caches tidal corrections.
    
    Returns:
    
    true if the instance caches tidal corrections
    
    Since:
    
    12.0
  - 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,
                                        int n)
```
    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
    
    n - number of neighbors
    
    Returns:
    
    array of cached entries surrounding specified date
    
    Since:
    
    12.0
  - 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 Intermediate 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 Intermediate 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

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_INTERPOLATION_DEGREE

Constructor Detail

EOPHistory

EOPHistory

Method Detail

isSimpleEop

getInterpolationDegree

getTimeScales

getEOPHistoryWithoutCachedTidalCorrection

cachesTidalCorrection

getConventions

getStartDate

getEndDate

getUT1MinusUTC

getUT1MinusUTC

getNeighbors

getLOD

getLOD

getPoleCorrection

getPoleCorrection

getEquinoxNutationCorrection

getEquinoxNutationCorrection

getNonRotatinOriginNutationCorrection

getNonRotatinOriginNutationCorrection

getITRFVersion

checkEOPContinuity

hasDataFor

getEntries