org.orekit.estimation.measurements

Class TDOA

java.lang.Object

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

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

org.orekit.estimation.measurements.TDOA

All Implemented Interfaces:

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

public class TDOA
extends GroundReceiverMeasurement<TDOA>

表示一个时间差到达测量的类，卫星作为发射器，两个地面站作为接收器。

TDOA测量发射器和接收器之间信号到达时间的差异，对应于两个接收器到发射器的距离差。

测量的日期对应于主站接收信号的日期。该测量对应于测量的日期减去第二个站接收信号的日期：tdoa = tr1 - tr2

在信号飞行时间内考虑站点和卫星的运动。

Since:

11.2

Author:

Pascal Parraud

Field Summary

Fields

Modifier and Type	Field and Description
static String	MEASUREMENT_TYPE 测量的类型。

Constructor Summary

Constructors

Constructor and Description
TDOA(GroundStation primeStation, GroundStation secondStation, AbsoluteDate date, double tdoa, double sigma, double baseWeight, ObservableSatellite satellite) 简单构造函数。

Method Summary

Modifier and Type	Method and Description
GroundStation	getPrimeStation() 获取主要地面站，即给出测量日期的地面站。
GroundStation	getSecondStation() 获取第二个地面站，即给出测量的地面站。
protected EstimatedMeasurement<TDOA>	theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states) 估计理论值。
protected EstimatedMeasurementBase<TDOA>	theoreticalEvaluationWithoutDerivatives(int iteration, int evaluation, SpacecraftState[] states) 估计不带导数的理论值。

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

测量的类型。

另请参阅:

常量字段数值

Constructor Detail

TDOA

public TDOA(GroundStation primeStation,
            GroundStation secondStation,
            AbsoluteDate date,
            double tdoa,
            double sigma,
            double baseWeight,
            ObservableSatellite satellite)

简单构造函数。

参数:

primeStation - 给出测量日期的地面站

secondStation - 给出测量的地面站

date - 测量的日期

tdoa - 观测值（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

getPrimeStation

public GroundStation getPrimeStation()

获取主要地面站，即给出测量日期的地面站。

返回:

主要地面站

getSecondStation

public GroundStation getSecondStation()

获取第二个地面站，即给出测量的地面站。

返回:

第二个地面站

theoreticalEvaluationWithoutDerivatives

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

估计不带导数的理论值。

理论值没有应用任何修饰符。

指定者:

theoreticalEvaluationWithoutDerivatives 在类 AbstractMeasurement<TDOA>

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<TDOA> theoreticalEvaluation(int iteration,
                                                           int evaluation,
                                                           SpacecraftState[] states)

估计理论值。

理论值没有应用任何修饰符。

指定者:

theoreticalEvaluation 在类 AbstractMeasurement<TDOA>

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[])