Package org.orekit.estimation.measurements.model

Class TwoLegsRangeRateModel

java.lang.Object

org.orekit.estimation.measurements.model.TwoLegsRangeRateModel

public class TwoLegsRangeRateModel
extends Object

Class for two-legs range rate (a.k.a. Doppler measurement). A signal is emitted, received a first time (relay/reflection) and received again a final time. There is no further assumption.

Since:

14.0

Author:

Romain Serra

Constructor Summary

Constructors

Constructor	Description
TwoLegsRangeRateModel(TwoLegsSignalTravelTimer twoWayTimer)	Constructor.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> T	value(Frame frame, FieldPVCoordinates<T> receiverPV, FieldAbsoluteDate<T> receptionDate, FieldPVCoordinatesProvider<T> relay, FieldAbsoluteDate<T> approxRelayDate, FieldPVCoordinatesProvider<T> emitter, FieldAbsoluteDate<T> approxEmissionDate)	Compute measurement.
<T extends CalculusFieldElement<T>> T	value(Frame frame, FieldPVCoordinates<T> receiverPV, FieldAbsoluteDate<T> receptionDate, FieldPVCoordinatesProvider<T> relay, FieldPVCoordinatesProvider<T> emitter)	Compute measurement without guess.
double	value(Frame frame, PVCoordinates receiverPV, AbsoluteDate receptionDate, PVCoordinatesProvider relay, AbsoluteDate approxRelayDate, PVCoordinatesProvider emitter, AbsoluteDate approxEmissionDate)	Compute measurement.
double	value(Frame frame, PVCoordinates receiverPV, AbsoluteDate receptionDate, PVCoordinatesProvider relay, PVCoordinatesProvider emitter)	Compute measurement without guess.

Methods inherited from class java.lang.Object

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

Constructor Detail

TwoLegsRangeRateModel

public TwoLegsRangeRateModel(TwoLegsSignalTravelTimer twoWayTimer)

Constructor.

Parameters:

twoWayTimer - two-way time delay computer

Method Detail

value

public double value(Frame frame,
                    PVCoordinates receiverPV,
                    AbsoluteDate receptionDate,
                    PVCoordinatesProvider relay,
                    PVCoordinatesProvider emitter)

Compute measurement without guess.

Parameters:

frame - frame where position is given

receiverPV - end receiver position-velocity (at reception)

receptionDate - signal end reception date

relay - signal relay (initial reception) coordinates provider

emitter - signal initial emitter coordinates provider

Returns:

ranges on both legs in chronological order (m)

value

public double value(Frame frame,
                    PVCoordinates receiverPV,
                    AbsoluteDate receptionDate,
                    PVCoordinatesProvider relay,
                    AbsoluteDate approxRelayDate,
                    PVCoordinatesProvider emitter,
                    AbsoluteDate approxEmissionDate)

Compute measurement.

Parameters:

frame - frame where position is given

receiverPV - end receiver position-velocity (at reception)

receptionDate - signal end reception date

relay - signal relay (initial reception) coordinates provider

approxRelayDate - guess for the relay date

emitter - signal initial emitter coordinates provider

approxEmissionDate - guess for the emission date

Returns:

ranges on both legs in chronological order (m)

value

public <T extends CalculusFieldElement<T>> T value(Frame frame,
                                                   FieldPVCoordinates<T> receiverPV,
                                                   FieldAbsoluteDate<T> receptionDate,
                                                   FieldPVCoordinatesProvider<T> relay,
                                                   FieldPVCoordinatesProvider<T> emitter)

Compute measurement without guess.

Type Parameters:

T - field type

Parameters:

frame - frame where position is given

receiverPV - end receiver position and velocity (at reception)

receptionDate - signal end reception date

relay - signal relay (initial reception) coordinates provider

emitter - signal initial emitter coordinates provider

Returns:

range rate (m/s)

value

public <T extends CalculusFieldElement<T>> T value(Frame frame,
                                                   FieldPVCoordinates<T> receiverPV,
                                                   FieldAbsoluteDate<T> receptionDate,
                                                   FieldPVCoordinatesProvider<T> relay,
                                                   FieldAbsoluteDate<T> approxRelayDate,
                                                   FieldPVCoordinatesProvider<T> emitter,
                                                   FieldAbsoluteDate<T> approxEmissionDate)

Compute measurement.

Type Parameters:

T - field type

Parameters:

frame - frame where position is given

receiverPV - end receiver position and velocity (at reception)

receptionDate - signal end reception date

relay - signal relay (initial reception) coordinates provider

approxRelayDate - guess for the relay date

emitter - signal initial emitter coordinates provider

approxEmissionDate - guess for the emission date

Returns:

range rate (m/s)