fr.cnes.sirius.patrius.signalpropagation.troposphere

Class MariniMurrayModel

java.lang.Object

fr.cnes.sirius.patrius.signalpropagation.troposphere.MariniMurrayModel

All Implemented Interfaces:

IParameterizable, TroposphericCorrection, Serializable

public class MariniMurrayModel
extends Object
implements TroposphericCorrection

This class provides the correction of laser range tracking data for the effect of atmospheric refraction. This derivation, provided by J. W. Marini and C. W. Murray Jr, applies to satellites with elevation above 10° and whose heights exceed 70km. The reference model used in this class is derived from the NASA technical report TM-X-70555 (available at the following link: https://ntrs.nasa.gov/search.jsp?R=19740007037). Position accuracies of better than a few centimeters are achievable with this model. It is worth stressing once more that the desired accuracy with this formulation can be obtained just for elevation angles above 10°. It is important to add that this model does not provide any type of correction in the elevation. In other words, the Marini-Murray model is based on the assumption that there are no differences between geometric and real satellite elevation.

Since:

4.8

Author:

Natale N. - GMV

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MariniMurrayModel(MeteorologicalConditionsProvider meteoConditionsProvider, double phi, double lambda, double alt) Constructor for the class MariniMurrayModel.

Method Summary

Modifier and Type	Method and Description
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	derivativeValue(Parameter p, double elevation) Compute the signal delay derivative value with respect to the input parameter.
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

MariniMurrayModel

public MariniMurrayModel(MeteorologicalConditionsProvider meteoConditionsProvider,
                         double phi,
                         double lambda,
                         double alt)

Constructor for the class MariniMurrayModel.

Parameters:

meteoConditionsProvider - provider for the meteorological conditions

phi - Latitude of the laser site [Radians]

lambda - Wavelength of radiation [nm]

alt - Altitude of the site [Meters]

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 signal delay 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.

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]