fr.cnes.sirius.patrius.signalpropagation

Class AzoulayModel

java.lang.Object

fr.cnes.sirius.patrius.signalpropagation.AzoulayModel

All Implemented Interfaces:

TroposphericCorrection, AngularCorrection, Serializable

public final class AzoulayModel
extends Object
implements TroposphericCorrection, AngularCorrection

This class is a tropospheric correction model that implements the TroposphericCorrection and AngularCorrection interfaces to correct a signal with the Azoulay model.

Since:

1.1

Version:

$Id$

Author:

Thomas Trapier

See Also:

TroposphericCorrection, Serialized Form

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
AzoulayModel(double pressure, double temperature, double moisture, double geodeticAltitude)
AzoulayModel(double pressure, double temperature, double moisture, double geodeticAltitude, boolean isGeometricElevation)

Method Summary

Modifier and Type	Method and Description
double	computeElevationCorrection(double elevation) Computes the correction for the signal elevation.
double	computeSignalDelay(double elevation) Calculates the tropospheric signal delay for the signal path from a ground station to a satellite.
double[]	getCorrectionsFromApparentElevation(double apparentElevation) Computes the corrections due to the troposphere from the apparent value of the elevation.
double[]	getCorrectionsFromGeometricElevation(double geometricElevation) Computes the corrections due to the troposphere from the geometric value of the elevation.

Methods inherited from class java.lang.Object

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

Constructor Detail

AzoulayModel

public AzoulayModel(double pressure,
                    double temperature,
                    double moisture,
                    double geodeticAltitude)

Parameters:

pressure - the ground atmospheric pressure [Pa]

temperature - the ground atmospheric temperature [K]

moisture - the ground atmospheric moisture [percent]

geodeticAltitude - the ground point geodetic altitude [m]

AzoulayModel

public AzoulayModel(double pressure,
                    double temperature,
                    double moisture,
                    double geodeticAltitude,
                    boolean isGeometricElevation)

Parameters:

pressure - the ground atmospheric pressure [Pa]

temperature - the ground atmospheric temperature [K]

moisture - the ground atmospheric moisture [percent]

geodeticAltitude - the ground point geodetic altitude [m]

isGeometricElevation - true if the computed correction is used to get the apparent elevation from the geometric elevation value, false if it is used to get the geometric elevation from the apparent elevation value

Method Detail

getCorrectionsFromGeometricElevation

public double[] getCorrectionsFromGeometricElevation(double geometricElevation)

Computes the corrections due to the troposphere from the geometric value of the elevation.

Parameters:

geometricElevation - the geometric elevation [rad]

Returns:

an array that contains both corrections : {(geometric elevation - apparent elevation), (geometric distance - apparent distance)}

getCorrectionsFromApparentElevation

public double[] getCorrectionsFromApparentElevation(double apparentElevation)

Computes the corrections due to the troposphere from the apparent value of the elevation.

Parameters:

apparentElevation - the apparent elevation (rad)

Returns:

an array that contains both corrections : {(geometric elevation - apparent elevation), (geometric distance - apparent distance)}

computeElevationCorrection

public double computeElevationCorrection(double elevation)

Computes the correction for the signal elevation.

Specified by:

computeElevationCorrection in interface AngularCorrection

Parameters:

elevation - the elevation of the satellite [rad]

Returns:

the angular correction of the signal elevation [rad]

computeSignalDelay

public double computeSignalDelay(double elevation)

Calculates the tropospheric signal delay for the signal path from a ground station to a satellite.

Specified by:

computeSignalDelay in interface TroposphericCorrection

Parameters:

elevation - the elevation of the satellite [rad]

Returns:

the signal delay due to the troposphere [s]