Package org.orekit.models.earth

Class MariniMurrayModel

java.lang.Object

org.orekit.models.earth.MariniMurrayModel

All Implemented Interfaces:

Serializable, DiscreteTroposphericModel, MappingFunction, TroposphericModel

public class MariniMurrayModel
extends Object
implements TroposphericModel

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", Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
static MariniMurrayModel	getStandardModel(double latitude, double lambda)	Create a new Marini-Murray model using a standard atmosphere model.
double	pathDelay(double elevation, double height)	Calculates the tropospheric path delay for the signal path from a ground station to a satellite.

Methods inherited from interface org.orekit.models.earth.MappingFunction

getParameters, getParameters

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.TroposphericModel

computeZenithDelay, computeZenithDelay, getParametersDrivers, mappingFactors, mappingFactors, pathDelay, pathDelay, pathDelay

Constructor Detail

MariniMurrayModel

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

latitude - site latitude

lambda - laser wavelength (c/f), nm

Method Detail

getStandardModel

public static MariniMurrayModel getStandardModel(double latitude,
                                                 double lambda)

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

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

Parameters:

latitude - site latitude

lambda - laser wavelength (c/f), nm

Returns:

a Marini-Murray model with standard environmental values

pathDelay

public double pathDelay(double elevation,
                        double height)

Description copied from interface: TroposphericModel

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

Specified by:

pathDelay in interface TroposphericModel

Parameters:

elevation - the elevation of the satellite, in radians

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

Returns:

the path delay due to the troposphere in m