fr.cnes.sirius.patrius.signalpropagation.troposphere

Class MariniMurrayModel

java.lang.Object

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

All Implemented Interfaces:

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

Field Summary

Fields inherited from interface fr.cnes.sirius.patrius.signalpropagation.troposphere.TroposphericCorrection

ABSOLUTE_ZERO, H0, P0, RH0, T0

Constructor Summary

Constructors

Constructor and Description
MariniMurrayModel(double p0, double phi, double rH, double t0, double lambda, double alt) Constructor for the class MariniMurrayModel.

Method Summary

Modifier and Type	Method and Description
double	computeSignalDelay(double elev) Calculates the tropospheric signal delay for the signal path from a ground station to a satellite.
boolean	equals(Object obj)
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface fr.cnes.sirius.patrius.signalpropagation.troposphere.TroposphericCorrection

computeStandardValues, computeStandardValues

Constructor Detail

MariniMurrayModel

public MariniMurrayModel(double p0,
                         double phi,
                         double rH,
                         double t0,
                         double lambda,
                         double alt)

Constructor for the class MariniMurrayModel.

Parameters:

p0 - Atmospheric pressure at the laser site [Pascal]

phi - Latitude of the laser site [Radians]

rH - Relative humidity measurement [%]

t0 - Atmospheric temperature at the laser site [Kelvin]

lambda - Wavelength of radiation [nm]

alt - Altitude of the site [Meters]

Method Detail

computeSignalDelay

public double computeSignalDelay(double elev)

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

Specified by:

computeSignalDelay in interface TroposphericCorrection

Parameters:

elev - the elevation of the satellite [rad]

Returns:

the signal delay due to the troposphere [s]

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object