org.orekit.estimation.measurements

Class BistaticRangeRate

java.lang.Object

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

org.orekit.estimation.measurements.GroundReceiverMeasurement<BistaticRangeRate>

org.orekit.estimation.measurements.BistaticRangeRate

All Implemented Interfaces:

Comparable<ComparableMeasurement>, ComparableMeasurement, ObservedMeasurement<BistaticRangeRate>, TimeStamped, ParameterDriversProvider

public class BistaticRangeRate
extends GroundReceiverMeasurement<BistaticRangeRate>

表示使用发射地面站和接收地面站进行双静态测距速度测量的类建模。

该测量被认为是一个信号：

• 从发射地面站发射
• 在航天器上反射
• 在接收地面站接收

测量的日期对应于在地面接收反射信号。在接收端测量的量是双静态径向速度，即相对于两个站点的径向速度之和。

在信号飞行时间内考虑站点和航天器的运动。

多普勒测量可以通过将速度乘以(fe/c)来获得，其中fe是发射频率。

Since:

11.2

Author:

Pascal Parraud

Field Summary

Fields

Modifier and Type	Field and Description
static String	MEASUREMENT_TYPE 测量类型。

Constructor Summary

Constructors

Constructor and Description
BistaticRangeRate(GroundStation emitter, GroundStation receiver, AbsoluteDate date, double rangeRate, double sigma, double baseWeight, ObservableSatellite satellite) 简单构造函数。

Method Summary

Modifier and Type	Method and Description
GroundStation	getEmitterStation() 获取发射地面站。
GroundStation	getReceiverStation() 获取接收地面站。
protected EstimatedMeasurement<BistaticRangeRate>	theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states) 估算理论值。
protected EstimatedMeasurementBase<BistaticRangeRate>	theoreticalEvaluationWithoutDerivatives(int iteration, int evaluation, SpacecraftState[] states) 估算不带导数的理论值。

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

computeCommonParametersWithDerivatives, computeCommonParametersWithout, getGroundStationCoordinates, getGroundStationPosition, getStation, isTwoWay

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

addModifier, addParameterDriver, estimate, estimateWithoutDerivatives, 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.ObservedMeasurement

getMeasurementType

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

compareTo

Methods inherited from interface org.orekit.time.TimeStamped

durationFrom

Methods inherited from interface org.orekit.utils.ParameterDriversProvider

getNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupported

Field Detail

MEASUREMENT_TYPE

public static final String MEASUREMENT_TYPE

测量类型。

另请参阅:

常量字段数值

Constructor Detail

BistaticRangeRate

public BistaticRangeRate(GroundStation emitter,
                         GroundStation receiver,
                         AbsoluteDate date,
                         double rangeRate,
                         double sigma,
                         double baseWeight,
                         ObservableSatellite satellite)

简单构造函数。

参数:

emitter - 发射地面站

receiver - 接收地面站

date - 测量日期

rangeRate - 观测值，m/s

sigma - 理论标准偏差

baseWeight - 基本权重

satellite - 与此测量相关的卫星

Method Detail

getEmitterStation

public GroundStation getEmitterStation()

获取发射地面站。

返回:

发射地面站

getReceiverStation

public GroundStation getReceiverStation()

获取接收地面站。

返回:

接收地面站

theoreticalEvaluationWithoutDerivatives

protected EstimatedMeasurementBase<BistaticRangeRate> theoreticalEvaluationWithoutDerivatives(int iteration,
                                                                                              int evaluation,
                                                                                              SpacecraftState[] states)

估算不带导数的理论值。

理论值没有应用任何修饰符。

指定者:

theoreticalEvaluationWithoutDerivatives 在类 AbstractMeasurement<BistaticRangeRate>

参数:

iteration - 迭代次数

evaluation - 评估次数

states - 测量日期的轨道状态

返回:

理论值

另请参阅:

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

theoreticalEvaluation

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

估算理论值。

理论值没有应用任何修饰符。

指定者:

theoreticalEvaluation 在类 AbstractMeasurement<BistaticRangeRate>

参数:

iteration - 迭代次数

evaluation - 评估次数

states - 测量日期的轨道状态

返回:

理论值

另请参阅:

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