public class FDOA extends GroundReceiverMeasurement<FDOA>
FDOA measures the difference in signal arrival frequency between the emitter and receivers, corresponding to a difference in range-rate from the two receivers to the emitter.
The date of the measurement corresponds to the reception of the signal by the prime station.
The measurement corresponds to the frequency of the signal received at the prime station at
the date of the measurement minus the frequency of the signal received at the second station:
fdoa = f1 - f2
The motion of the stations and the satellite during the signal flight time are taken into account.
| Modifier and Type | Field and Description |
|---|---|
static String |
MEASUREMENT_TYPE
Type of the measurement.
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| Constructor and Description |
|---|
FDOA(GroundStation primeStation,
GroundStation secondStation,
double centreFrequency,
AbsoluteDate date,
double fdoa,
double sigma,
double baseWeight,
ObservableSatellite satellite)
Simple constructor.
|
| Modifier and Type | Method and Description |
|---|---|
GroundStation |
getPrimeStation()
Get the prime ground station, the one that gives the date of the measurement.
|
GroundStation |
getSecondStation()
Get the second ground station, the one that gives the measurement.
|
protected EstimatedMeasurement<FDOA> |
theoreticalEvaluation(int iteration,
int evaluation,
SpacecraftState[] states)
Estimate the theoretical value.
|
protected EstimatedMeasurementBase<FDOA> |
theoreticalEvaluationWithoutDerivatives(int iteration,
int evaluation,
SpacecraftState[] states)
Estimate the theoretical value without derivatives.
|
computeCommonParametersWithDerivatives, computeCommonParametersWithout, getGroundStationCoordinates, getGroundStationPosition, getStation, isTwoWayaddModifier, addParameterDriver, estimate, estimateWithoutDerivatives, getBaseWeight, getCoordinates, getDate, getDimension, getModifiers, getObservedValue, getParametersDrivers, getSatellites, getTheoreticalStandardDeviation, isEnabled, setEnabled, signalTimeOfFlight, signalTimeOfFlightclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetMeasurementTypecompareTodurationFromgetNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupportedpublic static final String MEASUREMENT_TYPE
public FDOA(GroundStation primeStation, GroundStation secondStation, double centreFrequency, AbsoluteDate date, double fdoa, double sigma, double baseWeight, ObservableSatellite satellite)
primeStation - ground station that gives the date of the measurementsecondStation - ground station that gives the measurementcentreFrequency - satellite emitter frequencydate - date of the measurementfdoa - observed value (s)sigma - theoretical standard deviationbaseWeight - base weightsatellite - satellite related to this measurementpublic GroundStation getPrimeStation()
public GroundStation getSecondStation()
protected EstimatedMeasurementBase<FDOA> theoreticalEvaluationWithoutDerivatives(int iteration, int evaluation, SpacecraftState[] states)
The theoretical value does not have any modifiers applied.
theoreticalEvaluationWithoutDerivatives in class AbstractMeasurement<FDOA>iteration - iteration numberevaluation - evaluation numberstates - orbital states at measurement dateAbstractMeasurement.estimate(int, int, SpacecraftState[])protected EstimatedMeasurement<FDOA> theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states)
The theoretical value does not have any modifiers applied.
theoreticalEvaluation in class AbstractMeasurement<FDOA>iteration - iteration numberevaluation - evaluation numberstates - orbital states at measurement dateAbstractMeasurement.estimate(int, int, SpacecraftState[])Copyright © 2002-2023 CS GROUP. All rights reserved.