Package org.orekit.models.earth.troposphere

Class MariniMurrayModel

java.lang.Object

org.orekit.models.earth.troposphere.MariniMurrayModel

All Implemented Interfaces:

DiscreteTroposphericModel, ParameterDriversProvider

public class MariniMurrayModel
extends Object
implements DiscreteTroposphericModel

The Marini-Murray tropospheric delay model for laser ranging.

Author:

Joris Olympio

See Also:

"Marini, J.W., and C.W. Murray, correction of Laser Range Tracking Data for Atmospheric Refraction at Elevations Above 10 degrees, X-591-73-351, NASA GSFC, 1973"

Constructor Summary

Constructors

Constructor	Description
MariniMurrayModel(double t0, double p0, double rh, double lambda)	Create a new Marini-Murray model for the troposphere using the given environmental conditions.

Method Summary

Modifier and Type	Method	Description
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.
static MariniMurrayModel	getStandardModel(double lambda)	Create a new Marini-Murray model using a standard atmosphere model.
double	pathDelay(double elevation, GeodeticPoint point, double[] parameters, AbsoluteDate date)	Calculates the tropospheric path delay for the signal path from a ground station to a satellite.
<T extends CalculusFieldElement<T>> T	pathDelay(T elevation, FieldGeodeticPoint<T> point, T[] parameters, FieldAbsoluteDate<T> date)	Calculates the tropospheric path delay for the signal path from a ground station to a satellite.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.utils.ParameterDriversProvider

getNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupported

Constructor Detail

MariniMurrayModel

public MariniMurrayModel(double t0,
                         double p0,
                         double rh,
                         double lambda)

Create a new Marini-Murray model for the troposphere using the given environmental conditions.

Parameters:

t0 - the temperature at the station, K

p0 - the atmospheric pressure at the station, mbar

rh - the humidity at the station, percent (50% -> 0.5)

lambda - laser wavelength (c/f), nm

Method Detail

getStandardModel

public static MariniMurrayModel getStandardModel(double lambda)

Create a new Marini-Murray model using a standard atmosphere model.

• temperature: 20 degree Celsius
• pressure: 1013.25 mbar
• humidity: 50%

Parameters:

lambda - laser wavelength (c/f), nm

Returns:

a Marini-Murray model with standard environmental values

pathDelay

public double pathDelay(double elevation,
                        GeodeticPoint point,
                        double[] parameters,
                        AbsoluteDate date)

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

Specified by:

pathDelay in interface DiscreteTroposphericModel

Parameters:

elevation - the elevation of the satellite, in radians

point - station location

parameters - tropospheric model parameters

date - current date

Returns:

the path delay due to the troposphere in m

pathDelay

public <T extends CalculusFieldElement<T>> T pathDelay(T elevation,
                                                       FieldGeodeticPoint<T> point,
                                                       T[] parameters,
                                                       FieldAbsoluteDate<T> date)

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

Specified by:

pathDelay in interface DiscreteTroposphericModel

Type Parameters:

T - type of the elements

Parameters:

elevation - the elevation of the satellite, in radians

point - station location

parameters - tropospheric model parameters at current date

date - current date

Returns:

the path delay due to the troposphere in m

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters.

Specified by:

getParametersDrivers in interface ParameterDriversProvider

Returns:

drivers for parameters