agi.foundation.geometry

(agi.foundation.models-2025r1.jar)

Class InternationalTerrestrialReferenceFrameTransformer

java.lang.Object

agi.foundation.infrastructure.DefinitionalObject

agi.foundation.geometry.InternationalTerrestrialReferenceFrameTransformer

All Implemented Interfaces:

ICloneWithContext, IEnumerateDependencies, IEquatableDefinition, IFreezable

public final class InternationalTerrestrialReferenceFrameTransformer
extends DefinitionalObject

A reference frame transformation between two different realizations of the International Terrestrial Reference System (ITRS), which are called International Terrestrial Reference Frames (ITRFs).

See the ITRF website for details on how the transformations are performed.

The EarthOrientationParameters of the EarthCentralBody determine which ITRF is the same as the FixedFrame (get / set) of the Earth. By default, this will be the ITRF2020 unless the EarthOrientationParameters specify otherwise.

Constructor Summary

Constructors

Constructor and Description
InternationalTerrestrialReferenceFrameTransformer() Initializes a new instance.
InternationalTerrestrialReferenceFrameTransformer(String from, String to, JulianDate epoch, Motion1<Cartesian> translation, Motion1<Double> scaling, Motion1<Cartesian> rotation) Initializes a new instance.

Method Summary

Modifier and Type	Method and Description
protected boolean	checkForSameDefinition(DefinitionalObject other) Checks to determine if another instance has the same definition as this instance and returns true if it does.
Object	clone(CopyContext context) Clones this object using the specified context.
protected int	computeCurrentDefinitionHashCode() Computes a hash code based on the current properties of this object.
Axes	convertAxes(Axes fromAxes, Axes axes) Converts an Axes such that the ITRF transformation is applied when it is evaluated.
static Axes	convertAxes(EarthCentralBody earth, Axes axes, String toFrame) Converts an Axes such that an ITRF transformation is applied when it is evaluated.
static Axes	convertAxes(EarthCentralBody earth, Axes axes, String toFrame, ArrayList<InternationalTerrestrialReferenceFrameTransformer> itrfList) Converts an Axes such that an ITRF transformation is applied when it is evaluated.
static Point	convertPoint(EarthCentralBody earth, Point point, String toFrame) Converts a Point such that an ITRF transformation is applied when it is evaluated.
static Point	convertPoint(EarthCentralBody earth, Point point, String toFrame, ArrayList<InternationalTerrestrialReferenceFrameTransformer> itrfList) Converts a Point such that an ITRF transformation is applied when it is evaluated.
Point	convertPoint(ReferenceFrame fromFrame, Point point) Converts a Point such that the ITRF transformation is applied when it is evaluated.
static PointInterpolator	createPointInterpolatorInFixedFrame(EarthCentralBody earth, InternationalTerrestrialReferenceFrameTransformer itrf, String itrfFrameOfData, InterpolationAlgorithm algorithm, int interpolationDegree, DateMotionCollection1<Cartesian> data) Creates a point interpolator in the Earth FixedFrame (get / set) that is built using data in an ITRF.
static PointInterpolator	createPointInterpolatorInFixedFrame(EarthCentralBody earth, Iterable<InternationalTerrestrialReferenceFrameTransformer> itrfList, String itrfFrameOfData, InterpolationAlgorithm algorithm, int interpolationDegree, DateMotionCollection1<Cartesian> data) Creates a point interpolator in the Earth FixedFrame (get / set) that is built using data in an ITRF.
JulianDate	getEpoch() Gets the defined epoch for the constant terms in the transformation.
InternationalTerrestrialReferenceFrameEvaluator	getEvaluator() Gets an evaluator that can be used to find a HelmertTransformation representing the motion of the To (get / set) ITRF relative to the From (get / set) ITRF at a given JulianDate.
InternationalTerrestrialReferenceFrameEvaluator	getEvaluator(EvaluatorGroup group) Gets an evaluator that can be used to find a HelmertTransformation representing the motion of the To (get / set) ITRF relative to the From (get / set) ITRF at a given JulianDate.
static InternationalTerrestrialReferenceFrameTransformer	getFirstFromList(Iterable<InternationalTerrestrialReferenceFrameTransformer> itrfList, String from, String to) Gets the first ITRF transformation in the list with the desired characteristics.
String	getFrom() Gets the name of the ITRF whose coordinates are being transformed into the To (get / set) ITRF.
static ArrayList<InternationalTerrestrialReferenceFrameTransformer>	getItrfDefinitions() Gets a list of ITRF transformers that can convert from ITRF2020 and ITRF2014 to earlier ITRF frames.
Motion1<Cartesian>	getRotation() Gets the off-diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).
Motion1<Double>	getScaling() Gets a small number that is added to one to form the diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).
String	getTo() Gets the name of the ITRF that coordinates are being transformed into.
Motion1<Cartesian>	getTranslation() Gets the constant position offset between the two ITRFs, and the rate at which it changes after the Epoch (get / set).
static ArrayList<InternationalTerrestrialReferenceFrameTransformer>	readFromItrfDefinitionsFile(BufferedReader reader) Reads an ITRF definitions file and creates a list of ITRF transformations.
static ArrayList<InternationalTerrestrialReferenceFrameTransformer>	readFromItrfDefinitionsFile(String filepath) Reads an ITRF definitions file and creates a list of ITRF transformations.
static ArrayList<InternationalTerrestrialReferenceFrameTransformer>	readFromItrfTransformationFile(BufferedReader reader) Reads an ITRF transformation parameters file and creates a list of ITRF transformations.
static ArrayList<InternationalTerrestrialReferenceFrameTransformer>	readFromItrfTransformationFile(String filepath) Reads an ITRF transformation parameters file and creates a list of ITRF transformations.
void	setEpoch(JulianDate value) Sets the defined epoch for the constant terms in the transformation.
void	setFrom(String value) Sets the name of the ITRF whose coordinates are being transformed into the To (get / set) ITRF.
void	setRotation(Motion1<Cartesian> value) Sets the off-diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).
void	setScaling(Motion1<Double> value) Sets a small number that is added to one to form the diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).
void	setTo(String value) Sets the name of the ITRF that coordinates are being transformed into.
void	setTranslation(Motion1<Cartesian> value) Sets the constant position offset between the two ITRFs, and the rate at which it changes after the Epoch (get / set).
DateMotionCollection1<Cartesian>	transformCollection(DateMotionCollection1<Cartesian> collection) Transforms a DateMotionCollection<Cartesian> from the From (get / set) to the To (get / set).

Methods inherited from class agi.foundation.infrastructure.DefinitionalObject

areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, enumerateDependencies, freeze, freezeAggregatedObjects, getCollectionHashCode, getCollectionHashCode, getCollectionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDictionaryHashCode, getIsFrozen, isSameDefinition, throwIfFrozen

Methods inherited from class java.lang.Object

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

Constructor Detail

InternationalTerrestrialReferenceFrameTransformer

public InternationalTerrestrialReferenceFrameTransformer()

Initializes a new instance. The user must set Epoch (get / set), Translation (get / set), Scaling (get / set), and Rotation (get / set).

InternationalTerrestrialReferenceFrameTransformer

public InternationalTerrestrialReferenceFrameTransformer(String from,
                                                         String to,
                                                         @Nonnull
                                                         JulianDate epoch,
                                                         @Nonnull
                                                         Motion1<Cartesian> translation,
                                                         @Nonnull
                                                         Motion1<Double> scaling,
                                                         @Nonnull
                                                         Motion1<Cartesian> rotation)

Initializes a new instance.

Parameters:

from - The name of the ITRF whose coordinates are being transformed into the to ITRF.

to - The name of the ITRF that the coordinates are being transformed into.

epoch - The defined epoch for the constant terms in the transformation.

translation - The constant position offset between the two ITRFs, and the rate at which it changes after the epoch.

scaling - A small number that is added to one to form the diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the epoch.

rotation - The off-diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the epoch.

Method Detail

clone

public Object clone(CopyContext context)

Clones this object using the specified context.

This method should be implemented to call a copy constructor on the class of the object being cloned. The copy constructor should take the CopyContext as a parameter in addition to the existing instance to copy. The copy constructor should first call CopyContext.addObjectMapping(T, T) to identify the newly constructed instance as a copy of the existing instance. It should then copy all fields, using CopyContext.updateReference(T) to copy any reference fields.

A typical implementation of ICloneWithContext:

public static class MyClass implements ICloneWithContext {
    public MyClass(MyClass existingInstance, CopyContext context) {
        context.addObjectMapping(existingInstance, this);
        someReference = context.updateReference(existingInstance.someReference);
    }

    @Override
    public final Object clone(CopyContext context) {
        return new MyClass(this, context);
    }

    private Object someReference;
}

In general, all fields that are reference types should be copied with a call to CopyContext.updateReference(T). There are a couple of exceptions:

1. Fields that are aggregate parts of the object should always be copied. A referenced object is an aggregate if properties or methods on the object being copied can modify the externally-visible value of the referenced object.
2. If the semantics of the referenced object require that it have a single parent, owner, context, etc., and the object being copied is that parent, owner, or context, then the referenced object should always be copied.

If one of these exceptions applies, the CopyContext should be given an opportunity to update the reference before the reference is copied explicitly. Use CopyContext.updateReference(T) to update the reference. If CopyContext.updateReference(T) returns the original object, indicating that the context does not have a replacement registered, then copy the object manually by invoking a Clone method, a copy constructor, or by manually constructing a new instance and copying the values.

alwaysCopy = context.updateReference(existingInstance.alwaysCopy);
if (existingInstance.alwaysCopy != null && alwaysCopy == existingInstance.alwaysCopy) {
    alwaysCopy = (AlwaysCopy) existingInstance.alwaysCopy.clone(context);
}

If you are implementing an evaluator (a class that implements IEvaluator), the IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) method shares some responsibilities with the copy context constructor. Code duplication can be avoided by doing the following:

1. For references to other evaluators ONLY, simply assign the reference in the constructor instead of calling CopyContext.updateReference(T). You should still call CopyContext.updateReference(T) on any references to non-evaluators.
2. Call IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as the last line in the constructor and pass it the same CopyContext passed to the constructor.
3. Implement IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as normal. See the reference documentation for IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) for more information on implementing that method.

public MyClass(MyClass existingInstance, CopyContext context) {
    super(existingInstance, context);
    someReference = context.updateReference(existingInstance.someReference);
    evaluatorReference = existingInstance.evaluatorReference;
    updateEvaluatorReferences(context);
}

@Override
public void updateEvaluatorReferences(CopyContext context) {
    evaluatorReference = context.updateReference(evaluatorReference);
}

@Override
public Object clone(CopyContext context) {
    return new MyClass(this, context);
}

private Object someReference;
private IEvaluator evaluatorReference;

Specified by:

clone in interface ICloneWithContext

Specified by:

clone in class DefinitionalObject

Parameters:

context - The context to use to perform the copy.

Returns:

A new instance which is a copy of this object.

checkForSameDefinition

protected boolean checkForSameDefinition(DefinitionalObject other)

Checks to determine if another instance has the same definition as this instance and returns true if it does. Derived classes MUST override this method and check all new fields introduced by the derived class for definitional equivalence. It is NOT necessary to check base class fields because the base class will already have done that. When overriding this method, you should NOT call the base implementation because it will return false for all derived-class instances. Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).

Specified by:

checkForSameDefinition in class DefinitionalObject

Parameters:

other - The other instance to compare to this one.

Returns:

true if the two objects are defined equivalently; otherwise false.

computeCurrentDefinitionHashCode

protected int computeCurrentDefinitionHashCode()

Computes a hash code based on the current properties of this object. Derived classes MUST override this method and compute a hash code that combines: a unique hash code seed, the base implementation result, and the hash codes of all new fields introduced by the derived class which are used in the InternationalTerrestrialReferenceFrameTransformer.checkForSameDefinition(agi.foundation.infrastructure.DefinitionalObject) method.

Overrides:

computeCurrentDefinitionHashCode in class DefinitionalObject

Returns:

The computed hash code.

getFrom

public final String getFrom()

Gets the name of the ITRF whose coordinates are being transformed into the To (get / set) ITRF.

setFrom

public final void setFrom(String value)

Sets the name of the ITRF whose coordinates are being transformed into the To (get / set) ITRF.

getTo

public final String getTo()

Gets the name of the ITRF that coordinates are being transformed into.

setTo

public final void setTo(String value)

Sets the name of the ITRF that coordinates are being transformed into.

getEpoch

@Nullable
public final JulianDate getEpoch()

Gets the defined epoch for the constant terms in the transformation.

setEpoch

public final void setEpoch(@Nullable
                           JulianDate value)

Sets the defined epoch for the constant terms in the transformation.

getTranslation

@Nonnull
public final Motion1<Cartesian> getTranslation()

Gets the constant position offset between the two ITRFs, and the rate at which it changes after the Epoch (get / set).

setTranslation

public final void setTranslation(@Nonnull
                                 Motion1<Cartesian> value)

Sets the constant position offset between the two ITRFs, and the rate at which it changes after the Epoch (get / set).

getScaling

@Nonnull
public final Motion1<Double> getScaling()

Gets a small number that is added to one to form the diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).

setScaling

public final void setScaling(@Nonnull
                             Motion1<Double> value)

Sets a small number that is added to one to form the diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).

getRotation

@Nonnull
public final Motion1<Cartesian> getRotation()

Gets the off-diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).

setRotation

public final void setRotation(@Nonnull
                              Motion1<Cartesian> value)

Sets the off-diagonal components of the skew-symmetric rotation matrix that is used to transform between the ITRFs, and the rate at which it changes after the Epoch (get / set).

getItrfDefinitions

@Nonnull
public static ArrayList<InternationalTerrestrialReferenceFrameTransformer> getItrfDefinitions()

Gets a list of ITRF transformers that can convert from ITRF2020 and ITRF2014 to earlier ITRF frames.

getFirstFromList

@Nonnull
public static InternationalTerrestrialReferenceFrameTransformer getFirstFromList(@Nonnull
                                                                                           Iterable<InternationalTerrestrialReferenceFrameTransformer> itrfList,
                                                                                           String from,
                                                                                           String to)

Gets the first ITRF transformation in the list with the desired characteristics.

Note that lists obtained from the file readers in this class change the names of the ITRFs before 2000 by converting to four-digit year numbers (e.g. ITRF97 becomes ITRF1997).

Parameters:

itrfList - A list of ITRF transformations.

from - The name of the desired ITRF that is used as the fixed frame whose coordinates are being transformed into the to.

to - The name of the ITRF that the coordinates are being transformed into.

Returns:

An ITRF transformation with the desired characteristics.

Throws:

ArgumentNullException - Thrown when itrfList is null.

IllegalStateException - Thrown when itrfList is empty or does not contain an ITRF transformation with the desired characteristics.

transformCollection

@Nonnull
public final DateMotionCollection1<Cartesian> transformCollection(@Nonnull
                                                                            DateMotionCollection1<Cartesian> collection)

Transforms a DateMotionCollection<Cartesian> from the From (get / set) to the To (get / set).

Parameters:

collection - The collection to be transformed.

Returns:

The transformed collection.

Throws:

ArgumentNullException - Thrown when collection is null.

createPointInterpolatorInFixedFrame

@Nonnull
public static PointInterpolator createPointInterpolatorInFixedFrame(@Nonnull
                                                                              EarthCentralBody earth,
                                                                              @Nonnull
                                                                              Iterable<InternationalTerrestrialReferenceFrameTransformer> itrfList,
                                                                              @Nonnull
                                                                              String itrfFrameOfData,
                                                                              @Nonnull
                                                                              InterpolationAlgorithm algorithm,
                                                                              int interpolationDegree,
                                                                              @Nonnull
                                                                              DateMotionCollection1<Cartesian> data)

Creates a point interpolator in the Earth FixedFrame (get / set) that is built using data in an ITRF.

If the native ITRF of the Earth orientation parameters is the same as the itrfFrameOfData, the fixed frame will be used with no ITRF transformations being performed on the data. If the ITRFs are different, then an ITRF transformation will be performed on the data before the point interpolator is built.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

itrfList - A list of ITRF transformations that contains the transformation from itrfFrameOfData to the NativeItrfFrame (get).

itrfFrameOfData - The ITRF that is the native frame of the data.

algorithm - The interpolation algorithm to be used to build the point interpolator.

interpolationDegree - The degree of the interpolation algorithm.

data - The data in the itrfFrameOfData that is to be interpolated.

Returns:

A point interpolator for the data that is in the Earth-fixed reference frame.

Throws:

ArgumentNullException - Thrown when earth, itrfList, itrfFrameOfData, algorithm, or data is null.

ArgumentOutOfRangeException - Thrown when interpolationDegree is less than zero.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when itrfList does not contain the necessary transformation to go from itrfFrameOfData to the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth (if the two frames are not the same).

createPointInterpolatorInFixedFrame

@Nonnull
public static PointInterpolator createPointInterpolatorInFixedFrame(@Nonnull
                                                                              EarthCentralBody earth,
                                                                              @Nonnull
                                                                              InternationalTerrestrialReferenceFrameTransformer itrf,
                                                                              @Nonnull
                                                                              String itrfFrameOfData,
                                                                              @Nonnull
                                                                              InterpolationAlgorithm algorithm,
                                                                              int interpolationDegree,
                                                                              @Nonnull
                                                                              DateMotionCollection1<Cartesian> data)

Creates a point interpolator in the Earth FixedFrame (get / set) that is built using data in an ITRF.

If the native ITRF of the Earth orientation parameters is the same as the itrfFrameOfData, the fixed frame will be used with no ITRF transformations being performed on the data. If the ITRFs are different, then an ITRF transformation will be performed on the data before the point interpolator is built.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

itrf - The ITRF transformation that contains the transformation from itrfFrameOfData to the NativeItrfFrame (get).

itrfFrameOfData - The ITRF that is the native frame of the data.

algorithm - The interpolation algorithm to be used to build the point interpolator.

interpolationDegree - The degree of the interpolation algorithm.

data - The data in the itrfFrameOfData that is to be interpolated.

Returns:

A point interpolator for the data that is in the Earth-fixed reference frame.

Throws:

ArgumentNullException - Thrown when earth, itrf, itrfFrameOfData, algorithm, or data is null.

ArgumentOutOfRangeException - Thrown when interpolationDegree is less than zero.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when itrf does not contain the necessary transformation to go from itrfFrameOfData to the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth (if the two frames are not the same).

readFromItrfDefinitionsFile

@Nonnull
public static ArrayList<InternationalTerrestrialReferenceFrameTransformer> readFromItrfDefinitionsFile(@Nonnull
                                                                                                                 String filepath)

Reads an ITRF definitions file and creates a list of ITRF transformations. Each data line in the file adds two ITRF transformations to the list: The forward transformation from the "from year" to the "to year" and the backward transformation from the "to year" to the "from year".

The units are automatically converted into meters, seconds, and radians from mm, years, and milli-arc seconds. Parts per billion (ppb) are divided by one billion to make the Scaling (get / set) constant term unitless.

A file of this format should be able to be found in the DynamicEarthData folder of a STK install that is 12.7 or later (2023r2 or later). Specifically, the correct file in that folder should be named "ITRFDefns.txt".

Parameters:

filepath - String file path for ITRF definitions file.

Returns:

A list of ITRF transformations.

Throws:

ArgumentNullException - Thrown when filepath is null.

readFromItrfDefinitionsFile

@Nonnull
public static ArrayList<InternationalTerrestrialReferenceFrameTransformer> readFromItrfDefinitionsFile(@Nonnull
                                                                                                                 BufferedReader reader)

Reads an ITRF definitions file and creates a list of ITRF transformations. Each data line in the file adds two ITRF transformations to the list: The forward transformation from the "from year" to the "to year" and the backward transformation from the "to year" to the "from year".

The units are automatically converted into meters, seconds, and radians from mm, years, and milli-arc seconds. Parts per billion (ppb) are divided by one billion to make the Scaling (get / set) constant term unitless.

A file of this format should be able to be found in the DynamicEarthData folder of a STK install that is 12.7 or later (2023r2 or later). Specifically, the correct file in that folder should be named "ITRFDefns.txt".

Parameters:

reader - A BufferedReader for the ITRF definitions .txt file.

Returns:

A list of ITRF transformations.

Throws:

ArgumentNullException - Thrown when reader is null.

readFromItrfTransformationFile

@Nonnull
public static ArrayList<InternationalTerrestrialReferenceFrameTransformer> readFromItrfTransformationFile(@Nonnull
                                                                                                                    String filepath)

Reads an ITRF transformation parameters file and creates a list of ITRF transformations. Each file contains transformation parameters from a specific ITRF to several other ITRFs. The forward transformations from the specific ITRF to the other ITRFs and the backward transformations from the other ITRFs to the specific ITRF are included in the resulting list of ITRFs.

The units are automatically converted into meters, seconds, and radians from mm, years, and milli-arc seconds. Parts per billion (ppb) are divided by one billion to make the Scaling (get / set) constant term unitless. The names of the ITRFs before 2000 in the files are modified to include four-digit years (e.g. ITRF97 becomes ITRF1997)

A file of this format that handles conversions to and from ITRF2020 can be found here. A similar file that handles conversions to and from ITRF2014 can be found here.

Parameters:

filepath - String file path for ITRF transformation parameters file.

Returns:

A list of ITRF transformations.

Throws:

ArgumentNullException - Thrown when filepath is null.

readFromItrfTransformationFile

@Nonnull
public static ArrayList<InternationalTerrestrialReferenceFrameTransformer> readFromItrfTransformationFile(@Nonnull
                                                                                                                    BufferedReader reader)

Reads an ITRF transformation parameters file and creates a list of ITRF transformations. Each file contains transformation parameters from a specific ITRF to several other ITRFs. The forward transformations from the specific ITRF to the other ITRFs and the backward transformations from the other ITRFs to the specific ITRF are included in the resulting list of ITRFs.

The units are automatically converted into meters, seconds, and radians from mm, years, and milli-arc seconds. Parts per billion (ppb) are divided by one billion to make the Scaling (get / set) constant term unitless. The names of the ITRFs before 2000 in the files are modified to include four-digit years (e.g. ITRF97 becomes ITRF1997)

A file of this format that handles conversions to and from ITRF2020 can be found here. A similar file that handles conversions to and from ITRF2014 can be found here.

Parameters:

reader - A BufferedReader for the ITRF transformation parameters .txt file.

Returns:

A list of ITRF transformations.

Throws:

ArgumentNullException - Thrown when reader is null.

convertPoint

@Nonnull
public static Point convertPoint(@Nonnull
                                           EarthCentralBody earth,
                                           @Nonnull
                                           Point point,
                                           @Nonnull
                                           String toFrame)

Converts a Point such that an ITRF transformation is applied when it is evaluated. ItrfDefinitions (get) is used to provide ITRF transformations.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

point - The point to be converted.

toFrame - The name of the ITRF that the point is being converted into.

Returns:

The converted point.

Throws:

ArgumentNullException - Thrown when earth, point, or toFrame is null.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when ItrfDefinitions (get) does not contain the necessary transformation to go from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth to the toFrame (if the two frames are not the same).

convertPoint

@Nonnull
public static Point convertPoint(@Nonnull
                                           EarthCentralBody earth,
                                           @Nonnull
                                           Point point,
                                           @Nonnull
                                           String toFrame,
                                           @Nonnull
                                           ArrayList<InternationalTerrestrialReferenceFrameTransformer> itrfList)

Converts a Point such that an ITRF transformation is applied when it is evaluated.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

point - The point to be converted.

toFrame - The name of the ITRF that the point is being converted into.

itrfList - A list of ITRF transformations that contains a transformation from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the EarthCentralBody to the toFrame.

Returns:

The converted point.

Throws:

ArgumentNullException - Thrown when earth, point, toFrame, or itrfList is null.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when itrfList does not contain the necessary transformation to go from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth to the toFrame (if the two frames are not the same).

convertAxes

@Nonnull
public static Axes convertAxes(@Nonnull
                                         EarthCentralBody earth,
                                         @Nonnull
                                         Axes axes,
                                         @Nonnull
                                         String toFrame)

Converts an Axes such that an ITRF transformation is applied when it is evaluated. ItrfDefinitions (get) is used to provide ITRF transformations.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

axes - The axes to be converted.

toFrame - The name of the ITRF that the axes is being converted into.

Returns:

The converted axes.

Throws:

ArgumentNullException - Thrown when earth, axes, or toFrame is null.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when ItrfDefinitions (get) does not contain the necessary transformation to go from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth to the toFrame (if the two frames are not the same).

convertAxes

@Nonnull
public static Axes convertAxes(@Nonnull
                                         EarthCentralBody earth,
                                         @Nonnull
                                         Axes axes,
                                         @Nonnull
                                         String toFrame,
                                         @Nonnull
                                         ArrayList<InternationalTerrestrialReferenceFrameTransformer> itrfList)

Converts an Axes such that an ITRF transformation is applied when it is evaluated.

Parameters:

earth - An EarthCentralBody configured with OrientationParameters (get / set) that have a NativeItrfFrame (get).

axes - The axes to be converted.

toFrame - The name of the ITRF that the axes is being converted into.

itrfList - A list of ITRF transformations that contains a transformation from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the EarthCentralBody to the toFrame.

Returns:

The converted axes.

Throws:

ArgumentNullException - Thrown when earth, axes, toFrame, or itrfList is null.

IllegalStateException - Thrown when the OrientationParameters (get / set) of earth are null or do not contain a NativeItrfFrame (get).

InvalidDataException - Thrown when itrfList does not contain the necessary transformation to go from the NativeItrfFrame (get) of the OrientationParameters (get / set) of the earth to the toFrame (if the two frames are not the same).

convertPoint

@Nonnull
public final Point convertPoint(@Nonnull
                                          ReferenceFrame fromFrame,
                                          @Nonnull
                                          Point point)

Converts a Point such that the ITRF transformation is applied when it is evaluated.

Parameters:

fromFrame - A reference frame that is the same frame as From (get / set).

point - The point to be converted.

Returns:

The converted point.

Throws:

ArgumentNullException - Thrown when fromFrame or point is null.

PropertyInvalidException - Thrown when Epoch (get / set) is null.

convertAxes

@Nonnull
public final Axes convertAxes(@Nonnull
                                        Axes fromAxes,
                                        @Nonnull
                                        Axes axes)

Converts an Axes such that the ITRF transformation is applied when it is evaluated.

Parameters:

fromAxes - An axes that is the same axes as the Axes (get / set) of From (get / set).

axes - The axes to be converted.

Returns:

The converted axes.

Throws:

ArgumentNullException - Thrown when fromAxes or axes is null.

PropertyInvalidException - Thrown when Epoch (get / set) is null.

getEvaluator

@Nonnull
public final InternationalTerrestrialReferenceFrameEvaluator getEvaluator()

Gets an evaluator that can be used to find a HelmertTransformation representing the motion of the To (get / set) ITRF relative to the From (get / set) ITRF at a given JulianDate.

Returns:

An evaluator for this ITRF.

Throws:

PropertyInvalidException - Thrown when the property Epoch (get / set) is null.

getEvaluator

@Nonnull
public final InternationalTerrestrialReferenceFrameEvaluator getEvaluator(@Nonnull
                                                                                    EvaluatorGroup group)

Gets an evaluator that can be used to find a HelmertTransformation representing the motion of the To (get / set) ITRF relative to the From (get / set) ITRF at a given JulianDate.

Parameters:

group - The group with which to associate the new evaluator. By grouping evaluators that are often evaluated at the same Julian dates, common computations can be performed only once for the entire group instead of multiple times for each evaluator.

Returns:

An evaluator for this ITRF.

Throws:

ArgumentNullException - Thrown when group is null.

PropertyInvalidException - Thrown when Epoch (get / set) is null.