fr.cnes.sirius.patrius.signalpropagation.troposphere

Class FixedDelayModel

java.lang.Object

fr.cnes.sirius.patrius.signalpropagation.troposphere.FixedDelayModel

All Implemented Interfaces:

IParameterizable, TroposphericCorrection, Serializable

public class FixedDelayModel
extends Object
implements TroposphericCorrection

A static tropospheric model that interpolates the actual tropospheric delay based on values read from a configuration file (tropospheric-delay.txt) via the DataProvidersManager.

Author:

Thomas Neidhart

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FixedDelayModel(double[] xArrIn, double[] yArrIn, double[][] fArrIn, double heightIn) Creates a new FixedDelayModel instance.
FixedDelayModel(String supportedName, double heightIn) Creates a new FixedDelayModel instance, and loads the delay values from the given resource via the DataProvidersManager.

Method Summary

Modifier and Type	Method and Description
double	computePathDelay(AbsoluteDate date, double elevation) Calculates the tropospheric path delay for the signal path from a ground station to a satellite at a given date.
double	computePathDelay(double elevation) Calculates the tropospheric path delay for the signal path from a ground station to a satellite.
double	computeSignalDelay(AbsoluteDate date, double elevation) Calculates the tropospheric signal delay for the signal path from a ground station to a satellite at a given date.
double	computeSignalDelay(double elevation) Calculates the tropospheric signal delay for the signal path from a ground station to a satellite.
double	derivativeValue(Parameter p, double elevation) Compute the derivative value with respect to the input parameter.
static FixedDelayModel	getDefaultModel(double height) Returns the default model, loading delay values from the file "tropospheric-delay.txt".
ArrayList<Parameter>	getParameters() Get the supported parameters.
boolean	isDifferentiableBy(Parameter p) Tell if the function is differentiable by the given parameter.
boolean	supportsParameter(Parameter param) Check if a parameter is supported.

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedDelayModel

public FixedDelayModel(double[] xArrIn,
                       double[] yArrIn,
                       double[][] fArrIn,
                       double heightIn)

Creates a new FixedDelayModel instance.

Parameters:

xArrIn - abscissa grid for the interpolation function

yArrIn - ordinate grid for the interpolation function

fArrIn - values samples for the interpolation function

heightIn - the height of the station in m above sea level [m]

FixedDelayModel

public FixedDelayModel(String supportedName,
                       double heightIn)
                throws PatriusException

Creates a new FixedDelayModel instance, and loads the delay values from the given resource via the DataProvidersManager.

Parameters:

supportedName - a regular expression for supported resource names

heightIn - the height of the station in m above sea level [m]

Throws:

PatriusException - if the resource could not be loaded

Method Detail

supportsParameter

public boolean supportsParameter(Parameter param)

Check if a parameter is supported.

Specified by:

supportsParameter in interface IParameterizable

Parameters:

param - parameter to check

Returns:

true if the parameter is supported

getParameters

public ArrayList<Parameter> getParameters()

Get the supported parameters.

Specified by:

getParameters in interface IParameterizable

Returns:

list of supported parameters

derivativeValue

public double derivativeValue(Parameter p,
                              double elevation)

Compute the derivative value with respect to the input parameter.

Specified by:

derivativeValue in interface TroposphericCorrection

Parameters:

p - parameter

elevation - the elevation of the satellite [rad]

Returns:

the derivative value

isDifferentiableBy

public boolean isDifferentiableBy(Parameter p)

Tell if the function is differentiable by the given parameter.

Specified by:

isDifferentiableBy in interface TroposphericCorrection

Parameters:

p - function parameter

Returns:

true if the function is differentiable by the given parameter.

getDefaultModel

public static FixedDelayModel getDefaultModel(double height)
                                       throws PatriusException

Returns the default model, loading delay values from the file "tropospheric-delay.txt".

Parameters:

height - the height of the station in m above sea level [m]

Returns:

the default model

Throws:

PatriusException - if the file could not be loaded

computePathDelay

public double computePathDelay(double elevation)

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

Parameters:

elevation - the elevation of the satellite [rad]

Returns:

the path delay due to the troposphere [m]

computePathDelay

public double computePathDelay(AbsoluteDate date,
                               double elevation)

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

Parameters:

date - date for meteo conditions

elevation - the elevation of the satellite [rad]

Returns:

the path delay due to the troposphere [m]

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]

computeSignalDelay

public double computeSignalDelay(AbsoluteDate date,
                                 double elevation)

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

Specified by:

computeSignalDelay in interface TroposphericCorrection

Parameters:

date - date of meteo conditions

elevation - the elevation of the satellite [rad]

Returns:

the signal delay due to the troposphere [s]