org.orekit.models.earth.troposphere

Class MariniMurrayModel

java.lang.Object

org.orekit.models.earth.troposphere.MariniMurrayModel

All Implemented Interfaces:

DiscreteTroposphericModel

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 and 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 and Description
List<ParameterDriver>	getParametersDrivers() Get the drivers for tropospheric model 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.models.earth.troposphere.DiscreteTroposphericModel

getParameters, getParameters

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

date - current date

Returns:

the path delay due to the troposphere in m

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for tropospheric model parameters.

Specified by:

getParametersDrivers in interface DiscreteTroposphericModel

Returns:

drivers for tropospheric model parameters