java.lang.Object
- org.orekit.orbits.FieldOrbit<T>
- - org.orekit.orbits.FieldCartesianOrbit<T>

Type Parameters:

T - type of the field elements

All Implemented Interfaces:

FieldTimeShiftable<FieldOrbit<T>,T>, FieldTimeStamped<T>, TimeShiftable<FieldOrbit<T>>, FieldPVCoordinatesProvider<T>
```
public class FieldCartesianOrbit<T extends CalculusFieldElement<T>>
extends FieldOrbit<T>
```
This class holds Cartesian orbital parameters.
The parameters used internally are the Cartesian coordinates:
- x
- y
- z
- xDot
- yDot
- zDot
contained in PVCoordinates.
Note that the implementation of this class delegates all non-Cartesian related computations (getA(), getEquinoctialEx(), ...) to an underlying instance of the EquinoctialOrbit class. This implies that using this class only for analytical computations which are always based on non-Cartesian parameters is perfectly possible but somewhat sub-optimal.

The instance CartesianOrbit is guaranteed to be immutable.
Since:

9.0

Author:

Luc Maisonobe, Guylaine Prat, Fabien Maussion, Véronique Pommier-Maurussane, Andrew Goetz

See Also:

Orbit, KeplerianOrbit, CircularOrbit, EquinoctialOrbit

Field Summary
- Fields inherited from class org.orekit.orbits.FieldOrbit
  TOLERANCE_POSITION_ANGLE_RATE

Constructor Summary

Constructors
Constructor	Description
`FieldCartesianOrbit(Field<T> field, CartesianOrbit op)`	Constructor from Field and CartesianOrbit.
`FieldCartesianOrbit(Field<T> field, Orbit op)`	Constructor from Field and Orbit.
`FieldCartesianOrbit(FieldOrbit<T> op)`	Constructor from any kind of orbital parameters.
`FieldCartesianOrbit(FieldPVCoordinates<T> pvaCoordinates, Frame frame, FieldAbsoluteDate<T> date, T mu)`	Constructor from Cartesian parameters.
`FieldCartesianOrbit(TimeStampedFieldPVCoordinates<T> pvaCoordinates, Frame frame, T mu)`	Constructor from Cartesian parameters.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addKeplerContribution(PositionAngleType type, T gm, T[] pDot)`	Add the contribution of the Keplerian motion to parameters derivatives
`protected T[][]`	`computeJacobianEccentricWrtCartesian()`	Compute the Jacobian of the orbital parameters with eccentric angle with respect to the Cartesian parameters.
`protected T[][]`	`computeJacobianMeanWrtCartesian()`	Compute the Jacobian of the orbital parameters with mean angle with respect to the Cartesian parameters.
`protected T[][]`	`computeJacobianTrueWrtCartesian()`	Compute the Jacobian of the orbital parameters with true angle with respect to the Cartesian parameters.
`T`	`getA()`	Get the semi-major axis.
`T`	`getADot()`	Get the semi-major axis derivative.
`T`	`getE()`	Get the eccentricity.
`T`	`getEDot()`	Get the eccentricity derivative.
`T`	`getEquinoctialEx()`	Get the first component of the equinoctial eccentricity vector.
`T`	`getEquinoctialExDot()`	Get the first component of the equinoctial eccentricity vector derivative.
`T`	`getEquinoctialEy()`	Get the second component of the equinoctial eccentricity vector.
`T`	`getEquinoctialEyDot()`	Get the second component of the equinoctial eccentricity vector derivative.
`T`	`getHx()`	Get the first component of the inclination vector.
`T`	`getHxDot()`	Get the first component of the inclination vector derivative.
`T`	`getHy()`	Get the second component of the inclination vector.
`T`	`getHyDot()`	Get the second component of the inclination vector derivative.
`T`	`getI()`	Get the inclination.
`T`	`getIDot()`	Get the inclination derivative.
`T`	`getLE()`	Get the eccentric longitude argument.
`T`	`getLEDot()`	Get the eccentric longitude argument derivative.
`T`	`getLM()`	Get the mean longitude argument.
`T`	`getLMDot()`	Get the mean longitude argument derivative.
`T`	`getLv()`	Get the true longitude argument.
`T`	`getLvDot()`	Get the true longitude argument derivative.
`OrbitType`	`getType()`	Get the orbit type.
`boolean`	`hasNonKeplerianAcceleration()`	Check if orbit includes non-Keplerian rates.
`FieldCartesianOrbit<T>`	`inFrame(Frame inertialFrame)`	Create a new object representing the same physical orbital state, but attached to a different reference frame.
`protected FieldVector3D<T>`	`initPosition()`	Compute the position coordinates from the canonical parameters.
`protected TimeStampedFieldPVCoordinates<T>`	`initPVCoordinates()`	Compute the position/velocity coordinates from the canonical parameters.
`protected FieldVector3D<T>`	`nonKeplerianAcceleration()`	Compute non-Keplerian part of the acceleration from first time derivatives.
`FieldCartesianOrbit<T>`	`shiftedBy(double dt)`	Get a time-shifted instance.
`FieldCartesianOrbit<T>`	`shiftedBy(T dt)`	Get a time-shifted orbit.
`CartesianOrbit`	`toOrbit()`	Transforms the FieldOrbit instance into an Orbit instance.
`String`	`toString()`	Returns a string representation of this Orbit object.

Methods inherited from class org.orekit.orbits.FieldOrbit
fillHalfRow, fillHalfRow, fillHalfRow, fillHalfRow, fillHalfRow, fillHalfRow, getDate, getDecompositionSolver, getField, getFrame, getJacobianWrtCartesian, getJacobianWrtParameters, getKeplerianMeanMotion, getKeplerianPeriod, getMeanAnomalyDotWrtA, getMu, getOne, getPosition, getPosition, getPosition, getPVCoordinates, getPVCoordinates, getPVCoordinates, getVelocity, getVelocity, getZero, hasNonKeplerianAcceleration, isElliptical

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

Methods inherited from interface org.orekit.time.FieldTimeStamped
durationFrom, durationFrom

Methods inherited from interface org.orekit.time.TimeShiftable
shiftedBy

- Constructor Detail
  - FieldCartesianOrbit
```
public FieldCartesianOrbit(TimeStampedFieldPVCoordinates<T> pvaCoordinates,
                           Frame frame,
                           T mu)
                    throws IllegalArgumentException
```
    Constructor from Cartesian parameters.
    The acceleration provided in pvCoordinates is accessible using FieldOrbit.getPVCoordinates() and FieldOrbit.getPVCoordinates(Frame). All other methods use mu and the position to compute the acceleration, including shiftedBy(CalculusFieldElement) and FieldOrbit.getPVCoordinates(FieldAbsoluteDate, Frame).
    
    Parameters:
    
    pvaCoordinates - the position, velocity and acceleration of the satellite.
    
    frame - the frame in which the PVCoordinates are defined (must be a pseudo-inertial frame)
    
    mu - central attraction coefficient (m³/s²)
    
    Throws:
    
    IllegalArgumentException - if frame is not a pseudo-inertial frame
  - FieldCartesianOrbit
```
public FieldCartesianOrbit(FieldPVCoordinates<T> pvaCoordinates,
                           Frame frame,
                           FieldAbsoluteDate<T> date,
                           T mu)
                    throws IllegalArgumentException
```
    Constructor from Cartesian parameters.
    The acceleration provided in pvCoordinates is accessible using FieldOrbit.getPVCoordinates() and FieldOrbit.getPVCoordinates(Frame). All other methods use mu and the position to compute the acceleration, including shiftedBy(CalculusFieldElement) and FieldOrbit.getPVCoordinates(FieldAbsoluteDate, Frame).
    
    Parameters:
    
    pvaCoordinates - the position and velocity of the satellite.
    
    frame - the frame in which the PVCoordinates are defined (must be a pseudo-inertial frame)
    
    date - date of the orbital parameters
    
    mu - central attraction coefficient (m³/s²)
    
    Throws:
    
    IllegalArgumentException - if frame is not a pseudo-inertial frame
  - FieldCartesianOrbit
```
public FieldCartesianOrbit(FieldOrbit<T> op)
```
    Constructor from any kind of orbital parameters.
    
    Parameters:
    
    op - orbital parameters to copy
  - FieldCartesianOrbit
```
public FieldCartesianOrbit(Field<T> field,
                           CartesianOrbit op)
```
    Constructor from Field and CartesianOrbit.
    Build a FieldCartesianOrbit from non-Field CartesianOrbit.
    
    Parameters:
    
    field - CalculusField to base object on
    
    op - non-field orbit with only "constant" terms
    
    Since:
    
    12.0
  - FieldCartesianOrbit
```
public FieldCartesianOrbit(Field<T> field,
                           Orbit op)
```
    Constructor from Field and Orbit.
    Build a FieldCartesianOrbit from any non-Field Orbit.
    
    Parameters:
    
    field - CalculusField to base object on
    
    op - non-field orbit with only "constant" terms
    
    Since:
    
    12.0
- Method Detail
  - getType
```
public OrbitType getType()
```
    Get the orbit type.
    
    Specified by:
    
    getType in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    orbit type
  - getA
```
public T getA()
```
    Get the semi-major axis.
    Note that the semi-major axis is considered negative for hyperbolic orbits.
    
    Specified by:
    
    getA in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    semi-major axis (m)
  - getADot
```
public T getADot()
```
    Get the semi-major axis derivative.
    Note that the semi-major axis is considered negative for hyperbolic orbits.
    
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getADot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    semi-major axis derivative (m/s)
  - getE
```
public T getE()
```
    Get the eccentricity.
    
    Specified by:
    
    getE in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    eccentricity
  - getEDot
```
public T getEDot()
```
    Get the eccentricity derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getEDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    eccentricity derivative
  - getI
```
public T getI()
```
    Get the inclination.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getI in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    inclination (rad)
  - getIDot
```
public T getIDot()
```
    Get the inclination derivative.
    
    Specified by:
    
    getIDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    inclination derivative (rad/s)
  - getEquinoctialEx
```
public T getEquinoctialEx()
```
    Get the first component of the equinoctial eccentricity vector.
    
    Specified by:
    
    getEquinoctialEx in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    first component of the equinoctial eccentricity vector
  - getEquinoctialExDot
```
public T getEquinoctialExDot()
```
    Get the first component of the equinoctial eccentricity vector derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getEquinoctialExDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    first component of the equinoctial eccentricity vector derivative
  - getEquinoctialEy
```
public T getEquinoctialEy()
```
    Get the second component of the equinoctial eccentricity vector.
    
    Specified by:
    
    getEquinoctialEy in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    second component of the equinoctial eccentricity vector
  - getEquinoctialEyDot
```
public T getEquinoctialEyDot()
```
    Get the second component of the equinoctial eccentricity vector derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getEquinoctialEyDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    second component of the equinoctial eccentricity vector derivative
  - getHx
```
public T getHx()
```
    Get the first component of the inclination vector.
    
    Specified by:
    
    getHx in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    first component of the inclination vector
  - getHxDot
```
public T getHxDot()
```
    Get the first component of the inclination vector derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getHxDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    first component of the inclination vector derivative
  - getHy
```
public T getHy()
```
    Get the second component of the inclination vector.
    
    Specified by:
    
    getHy in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    second component of the inclination vector
  - getHyDot
```
public T getHyDot()
```
    Get the second component of the inclination vector derivative.
    
    Specified by:
    
    getHyDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    second component of the inclination vector derivative
  - getLv
```
public T getLv()
```
    Get the true longitude argument.
    
    Specified by:
    
    getLv in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    v + ω + Ω true longitude argument (rad)
  - getLvDot
```
public T getLvDot()
```
    Get the true longitude argument derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getLvDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    d(v + ω + Ω)/dt true longitude argument derivative (rad/s)
  - getLE
```
public T getLE()
```
    Get the eccentric longitude argument.
    
    Specified by:
    
    getLE in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    E + ω + Ω eccentric longitude argument (rad)
  - getLEDot
```
public T getLEDot()
```
    Get the eccentric longitude argument derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getLEDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    d(E + ω + Ω)/dt eccentric longitude argument derivative (rad/s)
  - getLM
```
public T getLM()
```
    Get the mean longitude argument.
    
    Specified by:
    
    getLM in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    M + ω + Ω mean longitude argument (rad)
  - getLMDot
```
public T getLMDot()
```
    Get the mean longitude argument derivative.
    If the orbit was created without derivatives, the value returned is null.
    
    Specified by:
    
    getLMDot in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    d(M + ω + Ω)/dt mean longitude argument derivative (rad/s)
  - hasNonKeplerianAcceleration
```
public boolean hasNonKeplerianAcceleration()
```
    Check if orbit includes non-Keplerian rates.
    
    Overrides:
    
    hasNonKeplerianAcceleration in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    true if orbit includes non-Keplerian derivatives
    
    See Also:
    
    FieldOrbit.getADot(), FieldOrbit.getEquinoctialExDot(), FieldOrbit.getEquinoctialEyDot(), FieldOrbit.getHxDot(), FieldOrbit.getHyDot(), FieldOrbit.getLEDot(), FieldOrbit.getLvDot(), FieldOrbit.getLMDot(), FieldOrbit.getEDot(), FieldOrbit.getIDot()
  - nonKeplerianAcceleration
```
protected FieldVector3D<T> nonKeplerianAcceleration()
```
    Compute non-Keplerian part of the acceleration from first time derivatives.
    
    Overrides:
    
    nonKeplerianAcceleration in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    non-Keplerian part of the acceleration
  - initPosition
```
protected FieldVector3D<T> initPosition()
```
    Compute the position coordinates from the canonical parameters.
    
    Specified by:
    
    initPosition in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    computed position coordinates
  - initPVCoordinates
```
protected TimeStampedFieldPVCoordinates<T> initPVCoordinates()
```
    Compute the position/velocity coordinates from the canonical parameters.
    
    Specified by:
    
    initPVCoordinates in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    computed position/velocity coordinates
  - inFrame
```
public FieldCartesianOrbit<T> inFrame(Frame inertialFrame)
```
    Create a new object representing the same physical orbital state, but attached to a different reference frame. If the new frame is not inertial, an exception will be thrown.
    
    Specified by:
    
    inFrame in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Parameters:
    
    inertialFrame - reference frame of output orbit
    
    Returns:
    
    orbit with different frame
  - shiftedBy
```
public FieldCartesianOrbit<T> shiftedBy(double dt)
```
    Get a time-shifted instance.
    
    Parameters:
    
    dt - time shift in seconds
    
    Returns:
    
    a new instance, shifted with respect to instance (which is not changed)
  - shiftedBy
```
public FieldCartesianOrbit<T> shiftedBy(T dt)
```
    Get a time-shifted orbit.
    The orbit can be slightly shifted to close dates. This shift is based on a simple Keplerian model. It is not intended as a replacement for proper orbit and attitude propagation but should be sufficient for small time shifts or coarse accuracy.
    
    Specified by:
    
    shiftedBy in interface FieldTimeShiftable<FieldOrbit<T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>
    
    Specified by:
    
    shiftedBy in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Parameters:
    
    dt - time shift in seconds
    
    Returns:
    
    a new orbit, shifted with respect to the instance (which is immutable)
  - computeJacobianMeanWrtCartesian
```
protected T[][] computeJacobianMeanWrtCartesian()
```
    Description copied from class: FieldOrbit
    
    Compute the Jacobian of the orbital parameters with mean angle with respect to the Cartesian parameters.
    Element jacobian[i][j] is the derivative of parameter i of the orbit with respect to Cartesian coordinate j. This means each row correspond to one orbital parameter whereas columns 0 to 5 correspond to the Cartesian coordinates x, y, z, xDot, yDot and zDot.
    
    Specified by:
    
    computeJacobianMeanWrtCartesian in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    6x6 Jacobian matrix
    
    See Also:
    
    FieldOrbit.computeJacobianEccentricWrtCartesian(), FieldOrbit.computeJacobianTrueWrtCartesian()
  - computeJacobianEccentricWrtCartesian
```
protected T[][] computeJacobianEccentricWrtCartesian()
```
    Description copied from class: FieldOrbit
    
    Compute the Jacobian of the orbital parameters with eccentric angle with respect to the Cartesian parameters.
    Element jacobian[i][j] is the derivative of parameter i of the orbit with respect to Cartesian coordinate j. This means each row correspond to one orbital parameter whereas columns 0 to 5 correspond to the Cartesian coordinates x, y, z, xDot, yDot and zDot.
    
    Specified by:
    
    computeJacobianEccentricWrtCartesian in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    6x6 Jacobian matrix
    
    See Also:
    
    FieldOrbit.computeJacobianMeanWrtCartesian(), FieldOrbit.computeJacobianTrueWrtCartesian()
  - computeJacobianTrueWrtCartesian
```
protected T[][] computeJacobianTrueWrtCartesian()
```
    Description copied from class: FieldOrbit
    
    Compute the Jacobian of the orbital parameters with true angle with respect to the Cartesian parameters.
    Element jacobian[i][j] is the derivative of parameter i of the orbit with respect to Cartesian coordinate j. This means each row correspond to one orbital parameter whereas columns 0 to 5 correspond to the Cartesian coordinates x, y, z, xDot, yDot and zDot.
    
    Specified by:
    
    computeJacobianTrueWrtCartesian in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    6x6 Jacobian matrix
    
    See Also:
    
    FieldOrbit.computeJacobianMeanWrtCartesian(), FieldOrbit.computeJacobianEccentricWrtCartesian()
  - addKeplerContribution
```
public void addKeplerContribution(PositionAngleType type,
                                  T gm,
                                  T[] pDot)
```
    Add the contribution of the Keplerian motion to parameters derivatives
    This method is used by integration-based propagators to evaluate the part of Keplerian motion to evolution of the orbital state.
    
    Specified by:
    
    addKeplerContribution in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Parameters:
    
    type - type of the position angle in the state
    
    gm - attraction coefficient to use
    
    pDot - array containing orbital state derivatives to update (the Keplerian part must be added to the array components, as the array may already contain some non-zero elements corresponding to non-Keplerian parts)
  - toString
```
public String toString()
```
    Returns a string representation of this Orbit object.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a string representation of this object
  - toOrbit
```
public CartesianOrbit toOrbit()
```
    Description copied from class: FieldOrbit
    
    Transforms the FieldOrbit instance into an Orbit instance.
    
    Specified by:
    
    toOrbit in class FieldOrbit<T extends CalculusFieldElement<T>>
    
    Returns:
    
    Orbit instance with same properties

Class FieldCartesianOrbit<T extends CalculusFieldElement<T>>

Field Summary

Fields inherited from class org.orekit.orbits.FieldOrbit

Constructor Summary

Method Summary

Methods inherited from class org.orekit.orbits.FieldOrbit

Methods inherited from class java.lang.Object

Methods inherited from interface org.orekit.time.FieldTimeStamped

Methods inherited from interface org.orekit.time.TimeShiftable

Constructor Detail

FieldCartesianOrbit

FieldCartesianOrbit

FieldCartesianOrbit

FieldCartesianOrbit

FieldCartesianOrbit

Method Detail

getType

getA

getADot

getE

getEDot

getI

getIDot

getEquinoctialEx

getEquinoctialExDot

getEquinoctialEy

getEquinoctialEyDot

getHx

getHxDot

getHy

getHyDot

getLv

getLvDot

getLE

getLEDot

getLM

getLMDot

hasNonKeplerianAcceleration

nonKeplerianAcceleration

initPosition

initPVCoordinates

inFrame

shiftedBy

shiftedBy

computeJacobianMeanWrtCartesian

computeJacobianEccentricWrtCartesian

computeJacobianTrueWrtCartesian

addKeplerContribution

toString

toOrbit