Package org.orekit.utils

Class FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>

java.lang.Object

org.orekit.utils.FieldAbsolutePVCoordinates<T>

Type Parameters:

T - type of the field elements

All Implemented Interfaces:

FieldTimeShiftable<ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T>,T>,T>, FieldTimeStamped<T>, TimeShiftable<ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T>,T>>, FieldPVCoordinatesProvider<T>, ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T>,T>

public class FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>
extends Object
implements ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T>,T>

Field implementation of AbsolutePVCoordinates.

Author:

Vincent Mouraux

See Also:

• AbsolutePVCoordinates

Constructor Summary

Constructors

Constructor	Description
FieldAbsolutePVCoordinates(Field<T> field, AbsolutePVCoordinates pva)	Build from Field and non-Fielded object.
FieldAbsolutePVCoordinates(Frame frame, FieldAbsoluteDate<T> date, FieldVector3D<T> position, FieldVector3D<T> velocity)	Build from position and velocity.
FieldAbsolutePVCoordinates(Frame frame, FieldAbsoluteDate<T> date, FieldVector3D<T> position, FieldVector3D<T> velocity, FieldVector3D<T> acceleration)	Build from position, velocity, acceleration.
FieldAbsolutePVCoordinates(Frame frame, FieldAbsoluteDate<T> date, FieldVector3D<U> p)	Builds a FieldAbsolutePVCoordinates triplet from a FieldVector3D<DerivativeStructure>.
FieldAbsolutePVCoordinates(Frame frame, FieldAbsoluteDate<T> date, FieldPVCoordinates<T> pva)	Build from frame, date and FieldPVA coordinates.
FieldAbsolutePVCoordinates(Frame frame, TimeStampedFieldPVCoordinates<T> pva)	Build from frame and TimeStampedFieldPVCoordinates.
FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date, FieldAbsolutePVCoordinates<T> start, FieldAbsolutePVCoordinates<T> end)	Subtractive constructor
FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date, T a, FieldAbsolutePVCoordinates<T> absPva)	Multiplicative constructor
FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date, T a1, FieldAbsolutePVCoordinates<T> absPv1, T a2, FieldAbsolutePVCoordinates<T> absPv2)	Linear constructor
FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date, T a1, FieldAbsolutePVCoordinates<T> absPv1, T a2, FieldAbsolutePVCoordinates<T> absPv2, T a3, FieldAbsolutePVCoordinates<T> absPv3)	Linear constructor
FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date, T a1, FieldAbsolutePVCoordinates<T> absPv1, T a2, FieldAbsolutePVCoordinates<T> absPv2, T a3, FieldAbsolutePVCoordinates<T> absPv3, T a4, FieldAbsolutePVCoordinates<T> absPv4)	Linear constructor

Method Summary

Modifier and Type	Method	Description
FieldVector3D<T>	getAcceleration()	Getter for the acceleration vector.
FieldAbsoluteDate<T>	getDate()	Get the date.
Frame	getFrame()	Get the frame in which the coordinates are defined.
FieldVector3D<T>	getPosition(FieldAbsoluteDate<T> otherDate, Frame outputFrame)	Get the position of the body in the selected frame.
TimeStampedFieldPVCoordinates<T>	getPVCoordinates()	Get the TimeStampedFieldPVCoordinates.
FieldAbsolutePVCoordinates<T>	shiftedBy(double dt)	Get a time-shifted state.
FieldAbsolutePVCoordinates<T>	shiftedBy(TimeOffset dt)	Get a time-shifted instance.
FieldAbsolutePVCoordinates<T>	shiftedBy(T dt)	Get a time-shifted state.
AbsolutePVCoordinates	toAbsolutePVCoordinates()	Converts to an AbsolutePVCoordinates instance.
String	toString()
FieldPVCoordinatesProvider<T>	toTaylorProvider()	Create a local provider using simply Taylor expansion through shiftedBy(double).

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.utils.ShiftableFieldPVCoordinatesHolder

getPosition, getPosition, getPVCoordinates, getPVCoordinates, getVelocity, getVelocity, getVelocity

Constructor Details

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Frame frame,
 FieldAbsoluteDate<T> date,
 FieldVector3D<T> position,
 FieldVector3D<T> velocity,
 FieldVector3D<T> acceleration)

Build from position, velocity, acceleration.

Parameters:

frame - the frame in which the coordinates are defined

date - coordinates date

position - the position vector (m)

velocity - the velocity vector (m/s)

acceleration - the acceleration vector (m/sÂý)

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Frame frame,
 FieldAbsoluteDate<T> date,
 FieldVector3D<T> position,
 FieldVector3D<T> velocity)

Build from position and velocity. Acceleration is set to zero.

Parameters:

frame - the frame in which the coordinates are defined

date - coordinates date

position - the position vector (m)

velocity - the velocity vector (m/s)

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Frame frame,
 FieldAbsoluteDate<T> date,
 FieldPVCoordinates<T> pva)

Build from frame, date and FieldPVA coordinates.

Parameters:

frame - the frame in which the coordinates are defined

date - date of the coordinates

pva - TimeStampedPVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Frame frame,
 TimeStampedFieldPVCoordinates<T> pva)

Build from frame and TimeStampedFieldPVCoordinates.

Parameters:

frame - the frame in which the coordinates are defined

pva - TimeStampedFieldPVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Field<T> field,
 AbsolutePVCoordinates pva)

Build from Field and non-Fielded object.

Parameters:

field - field

pva - non-Field AbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date,
 T a,
 FieldAbsolutePVCoordinates<T> absPva)

Multiplicative constructor

Build a FieldAbsolutePVCoordinates from another one and a scale factor.

The TimeStampedFieldPVCoordinates built will be a * AbsPva

Parameters:

date - date of the built coordinates

a - scale factor

absPva - base (unscaled) FieldAbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date,
 FieldAbsolutePVCoordinates<T> start,
 FieldAbsolutePVCoordinates<T> end)

Subtractive constructor

Build a relative FieldAbsolutePVCoordinates from a start and an end position.

The FieldAbsolutePVCoordinates built will be end - start.

In case start and end use two different pseudo-inertial frames, the new FieldAbsolutePVCoordinates arbitrarily be defined in the start frame.

Parameters:

date - date of the built coordinates

start - Starting FieldAbsolutePVCoordinates

end - ending FieldAbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date,
 T a1,
 FieldAbsolutePVCoordinates<T> absPv1,
 T a2,
 FieldAbsolutePVCoordinates<T> absPv2)

Linear constructor

Build a FieldAbsolutePVCoordinates from two other ones and corresponding scale factors.

The FieldAbsolutePVCoordinates built will be a1 * u1 + a2 * u2

In case the FieldAbsolutePVCoordinates use different pseudo-inertial frames, the new FieldAbsolutePVCoordinates arbitrarily be defined in the first frame.

Parameters:

date - date of the built coordinates

a1 - first scale factor

absPv1 - first base (unscaled) FieldAbsolutePVCoordinates

a2 - second scale factor

absPv2 - second base (unscaled) FieldAbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date,
 T a1,
 FieldAbsolutePVCoordinates<T> absPv1,
 T a2,
 FieldAbsolutePVCoordinates<T> absPv2,
 T a3,
 FieldAbsolutePVCoordinates<T> absPv3)

Linear constructor

Build a FieldAbsolutePVCoordinates from three other ones and corresponding scale factors.

The FieldAbsolutePVCoordinates built will be a1 * u1 + a2 * u2 + a3 * u3

In case the FieldAbsolutePVCoordinates use different pseudo-inertial frames, the new FieldAbsolutePVCoordinates arbitrarily be defined in the first frame.

Parameters:

date - date of the built coordinates

a1 - first scale factor

absPv1 - first base (unscaled) FieldAbsolutePVCoordinates

a2 - second scale factor

absPv2 - second base (unscaled) FieldAbsolutePVCoordinates

a3 - third scale factor

absPv3 - third base (unscaled) FieldAbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(FieldAbsoluteDate<T> date,
 T a1,
 FieldAbsolutePVCoordinates<T> absPv1,
 T a2,
 FieldAbsolutePVCoordinates<T> absPv2,
 T a3,
 FieldAbsolutePVCoordinates<T> absPv3,
 T a4,
 FieldAbsolutePVCoordinates<T> absPv4)

Linear constructor

Build a FieldAbsolutePVCoordinates from four other ones and corresponding scale factors.

The FieldAbsolutePVCoordinates built will be a1 * u1 + a2 * u2 + a3 * u3 + a4 * u4

In case the FieldAbsolutePVCoordinates use different pseudo-inertial frames, the new AbsolutePVCoordinates arbitrarily be defined in the first frame.

Parameters:

date - date of the built coordinates

a1 - first scale factor

absPv1 - first base (unscaled) FieldAbsolutePVCoordinates

a2 - second scale factor

absPv2 - second base (unscaled) FieldAbsolutePVCoordinates

a3 - third scale factor

absPv3 - third base (unscaled) FieldAbsolutePVCoordinates

a4 - fourth scale factor

absPv4 - fourth base (unscaled) FieldAbsolutePVCoordinates

FieldAbsolutePVCoordinates

public FieldAbsolutePVCoordinates(Frame frame,
 FieldAbsoluteDate<T> date,
 FieldVector3D<U> p)

Builds a FieldAbsolutePVCoordinates triplet from a FieldVector3D<DerivativeStructure>.

The vector components must have time as their only derivation parameter and have consistent derivation orders.

Type Parameters:

U - type of the derivative

Parameters:

frame - the frame in which the parameters are defined

date - date of the built coordinates

p - vector with time-derivatives embedded within the coordinates

Method Details

shiftedBy

public FieldAbsolutePVCoordinates<T> shiftedBy(T dt)

Get a time-shifted state.

The state can be slightly shifted to close dates. This shift is based on a simple Taylor expansion. It is not intended as a replacement for proper orbit propagation (it is not even Keplerian!) but should be sufficient for either small time shifts or coarse accuracy.

Specified by:

shiftedBy in interface FieldTimeShiftable<ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>

Parameters:

dt - time shift in seconds

Returns:

a new state, shifted with respect to the instance (which is immutable)

shiftedBy

public FieldAbsolutePVCoordinates<T> shiftedBy(TimeOffset dt)

Description copied from interface: TimeShiftable

Get a time-shifted instance.

Specified by:

shiftedBy in interface TimeShiftable<T extends CalculusFieldElement<T>>

Parameters:

dt - time shift

Returns:

a new instance, shifted with respect to instance (which is not changed)

shiftedBy

public FieldAbsolutePVCoordinates<T> shiftedBy(double dt)

Get a time-shifted state.

The state can be slightly shifted to close dates. This shift is based on a simple Taylor expansion. It is not intended as a replacement for proper orbit propagation (it is not even Keplerian!) but should be sufficient for either small time shifts or coarse accuracy.

Specified by:

shiftedBy in interface TimeShiftable<T extends CalculusFieldElement<T>>

Parameters:

dt - time shift in seconds

Returns:

a new state, shifted with respect to the instance (which is immutable)

toTaylorProvider

public FieldPVCoordinatesProvider<T> toTaylorProvider()

Create a local provider using simply Taylor expansion through shiftedBy(double).

The time evolution is based on a simple Taylor expansion. It is not intended as a replacement for proper orbit propagation (it is not even Keplerian!) but should be sufficient for either small time shifts or coarse accuracy.

Returns:

provider based on Taylor expansion, for small time shifts around instance date

getDate

public FieldAbsoluteDate<T> getDate()

Get the date.

Specified by:

getDate in interface FieldTimeStamped<T extends CalculusFieldElement<T>>

Returns:

date attached to the object

getFrame

public Frame getFrame()

Get the frame in which the coordinates are defined.

Specified by:

getFrame in interface ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>

Returns:

frame in which the coordinates are defined

getPVCoordinates

public TimeStampedFieldPVCoordinates<T> getPVCoordinates()

Get the TimeStampedFieldPVCoordinates.

Specified by:

getPVCoordinates in interface ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>

Returns:

TimeStampedFieldPVCoordinates

getAcceleration

public FieldVector3D<T> getAcceleration()

Getter for the acceleration vector.

Returns:

acceleration

getPosition

public FieldVector3D<T> getPosition(FieldAbsoluteDate<T> otherDate,
 Frame outputFrame)

Get the position of the body in the selected frame.

Specified by:

getPosition in interface FieldPVCoordinatesProvider<T extends CalculusFieldElement<T>>

Specified by:

getPosition in interface ShiftableFieldPVCoordinatesHolder<FieldAbsolutePVCoordinates<T extends CalculusFieldElement<T>>,T extends CalculusFieldElement<T>>

Parameters:

otherDate - current date

outputFrame - the frame where to define the position

Returns:

position of the body (m and)

toAbsolutePVCoordinates

public AbsolutePVCoordinates toAbsolutePVCoordinates()

Converts to an AbsolutePVCoordinates instance.

Returns:

AbsolutePVCoordinates with same properties

toString

@DefaultDataContext
public String toString()

Overrides:

toString in class Object