org.orekit.estimation.measurements.gnss

Class Phase

java.lang.Object

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

org.orekit.estimation.measurements.gnss.Phase

All Implemented Interfaces:

Comparable<ComparableMeasurement>, ComparableMeasurement, ObservedMeasurement<Phase>, TimeStamped

public class Phase
extends AbstractMeasurement<Phase>

Class modeling a phase measurement from a ground station.

The measurement is considered to be a signal emitted from a spacecraft and received on a ground station. Its value is the number of cycles between emission and reception. The motion of both the station and the spacecraft during the signal flight time are taken into account. The date of the measurement corresponds to the reception on ground of the emitted signal.

Since:

9.2

Author:

Thierry Ceolin, Luc Maisonobe, Maxime Journot

Field Summary

Fields

Modifier and Type	Field and Description
static String	AMBIGUITY_NAME Name for ambiguity driver.

Constructor Summary

Constructors

Constructor and Description
Phase(GroundStation station, AbsoluteDate date, double phase, double wavelength, double sigma, double baseWeight, ObservableSatellite satellite) Simple constructor.

Method Summary

Modifier and Type	Method and Description
ParameterDriver	getAmbiguityDriver() Get the driver for phase ambiguity.
GroundStation	getStation() Get the ground station from which measurement is performed.
double	getWavelength() Get the wavelength.
protected EstimatedMeasurement<Phase>	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

Field Detail

AMBIGUITY_NAME

public static final String AMBIGUITY_NAME

Name for ambiguity driver.

See Also:

Constant Field Values

Constructor Detail

Phase

public Phase(GroundStation station,
             AbsoluteDate date,
             double phase,
             double wavelength,
             double sigma,
             double baseWeight,
             ObservableSatellite satellite)

Simple constructor.

Parameters:

station - ground station from which measurement is performed

date - date of the measurement

phase - observed value (cycles)

wavelength - phase observed value wavelength (m)

sigma - theoretical standard deviation

baseWeight - base weight

satellite - satellite related to this measurement

Since:

9.3

Method Detail

getStation

public GroundStation getStation()

Get the ground station from which measurement is performed.

Returns:

ground station from which measurement is performed

getWavelength

public double getWavelength()

Get the wavelength.

Returns:

wavelength (m)

getAmbiguityDriver

public ParameterDriver getAmbiguityDriver()

Get the driver for phase ambiguity.

Returns:

the driver for phase ambiguity

Since:

10.3

theoreticalEvaluation

protected EstimatedMeasurement<Phase> 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<Phase>

Parameters:

iteration - iteration number

evaluation - evaluation number

states - orbital states at measurement date

Returns:

theoretical value

See Also:

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