org.orekit.estimation.measurements

Class BistaticRange

java.lang.Object

org.orekit.estimation.measurements.AbstractMeasurement<BistaticRange>

org.orekit.estimation.measurements.BistaticRange

All Implemented Interfaces:

Comparable<ComparableMeasurement>, ComparableMeasurement, ObservedMeasurement<BistaticRange>, TimeStamped

public class BistaticRange
extends AbstractMeasurement<BistaticRange>

Class modeling a bistatic range measurement using an emitter ground station and a receiver ground station.

The measurement is considered to be a signal:

• Emitted from the emitter ground station
• Reflected on the spacecraft
• Received on the receiver ground station

The date of the measurement corresponds to the reception on ground of the reflected signal.

The motion of the stations and the spacecraft during the signal flight time are taken into account.

Since:

11.2

Author:

Mark Rutten

Constructor Summary

Constructors

Constructor and Description
BistaticRange(GroundStation emitter, GroundStation receiver, AbsoluteDate date, double range, double sigma, double baseWeight, ObservableSatellite satellite) Simple constructor.

Method Summary

Modifier and Type	Method and Description
GroundStation	getEmitterStation()
GroundStation	getReceiverStation()
protected EstimatedMeasurement<BistaticRange>	theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states) Estimate the theoretical value.

Methods inherited from class org.orekit.estimation.measurements.AbstractMeasurement

addModifier, addParameterDriver, estimate, getBaseWeight, getCoordinates, getDate, getDimension, getModifiers, getObservedValue, getParametersDrivers, getSatellites, getTheoreticalStandardDeviation, isEnabled, setEnabled, signalTimeOfFlight, signalTimeOfFlight

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.estimation.measurements.ComparableMeasurement

compareTo

Constructor Detail

BistaticRange

public BistaticRange(GroundStation emitter,
                     GroundStation receiver,
                     AbsoluteDate date,
                     double range,
                     double sigma,
                     double baseWeight,
                     ObservableSatellite satellite)

Simple constructor.

Parameters:

emitter - ground station from which transmission is performed

receiver - ground station from which measurement is performed

date - date of the measurement

range - observed value

sigma - theoretical standard deviation

baseWeight - base weight

satellite - satellite related to this measurement

Since:

11.2

Method Detail

getEmitterStation

public GroundStation getEmitterStation()

getReceiverStation

public GroundStation getReceiverStation()

theoreticalEvaluation

protected EstimatedMeasurement<BistaticRange> theoreticalEvaluation(int iteration,
                                                                    int evaluation,
                                                                    SpacecraftState[] states)

Estimate the theoretical value.

The theoretical value does not have any modifiers applied.

Specified by:

theoreticalEvaluation in class AbstractMeasurement<BistaticRange>

Parameters:

iteration - iteration number

evaluation - evaluation number

states - orbital states at measurement date

Returns:

theoretical value

See Also:

AbstractMeasurement.estimate(int, int, SpacecraftState[])