org.orekit.models.earth

Class FixedTroposphericDelay

java.lang.Object

org.orekit.models.earth.FixedTroposphericDelay

All Implemented Interfaces:

Serializable, TroposphericDelayModel

public class FixedTroposphericDelay
extends Object
implements TroposphericDelayModel

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
FixedTroposphericDelay(double[] xArr, double[] yArr, double[][] fArr) Creates a new FixedTroposphericDelay instance.
FixedTroposphericDelay(String supportedName) Creates a new FixedTroposphericDelay instance, and loads the delay values from the given resource via the DataProvidersManager.

Method Summary

Methods

Modifier and Type	Method and Description
double	calculatePathDelay(double elevation, double height) Calculates the tropospheric path delay for the signal path from a ground station to a satellite.
double	calculateSignalDelay(double elevation, double height) Calculates the tropospheric signal delay for the signal path from a ground station to a satellite.
static FixedTroposphericDelay	getDefaultModel() Returns the default model, loading delay values from the file "tropospheric-delay.txt".

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedTroposphericDelay

public FixedTroposphericDelay(double[] xArr,
                      double[] yArr,
                      double[][] fArr)

Creates a new FixedTroposphericDelay instance.

Parameters:

xArr - abscissa grid for the interpolation function

yArr - ordinate grid for the interpolation function

fArr - values samples for the interpolation function

FixedTroposphericDelay

public FixedTroposphericDelay(String supportedName)
                       throws OrekitException

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

Parameters:

supportedName - a regular expression for supported resource names

Throws:

OrekitException - if the resource could not be loaded

Method Detail

getDefaultModel

public static FixedTroposphericDelay getDefaultModel()
                                              throws OrekitException

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

Returns:

the default model

Throws:

OrekitException - if the file could not be loaded

calculatePathDelay

public double calculatePathDelay(double elevation,
                        double height)

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

Specified by:

calculatePathDelay in interface TroposphericDelayModel

Parameters:

elevation - the elevation of the satellite in degrees

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

Returns:

the path delay due to the troposphere in m

calculateSignalDelay

public double calculateSignalDelay(double elevation,
                          double height)

Calculates the tropospheric signal delay for the signal path from a ground station to a satellite. This method exists only for convenience reasons and returns the same as

   SaastamoinenModel.calculatePathDelay(double, double)/Constants.SPEED_OF_LIGHT
 

Specified by:

calculateSignalDelay in interface TroposphericDelayModel

Parameters:

elevation - the elevation of the satellite in degrees

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

Returns:

the signal delay due to the troposphere in s