Package org.orekit.models.earth.troposphere

Class MendesPavlisModel

java.lang.Object

org.orekit.models.earth.troposphere.MendesPavlisModel

All Implemented Interfaces:

TroposphereMappingFunction, TroposphericModel, ParameterDriversProvider

public class MendesPavlisModel
extends Object
implements TroposphericModel, TroposphereMappingFunction

The Mendes - Pavlis tropospheric delay model for optical techniques. It is valid for a wide range of wavelengths from 0.355µm to 1.064µm (Mendes and Pavlis, 2003)

Author:

Bryan Cazabonne

See Also:

• "Mendes, V. B., & Pavlis, E. C. (2004). High‐accuracy zenith delay prediction at optical wavelengths. Geophysical Research Letters, 31(14)."
• "Petit, G. and Luzum, B. (eds.), IERS Conventions (2010), IERS Technical Note No. 36, BKG (2010)"

Constructor Summary

Constructors

Constructor	Description
MendesPavlisModel(PressureTemperatureHumidityProvider pthProvider, double lambda, Unit lambdaUnits)	Create a new Mendes-Pavlis model for the troposphere.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> T[]	computeZenithDelay(FieldGeodeticPoint<T> point, FieldAbsoluteDate<T> date)	This method allows the computation of the zenith hydrostatic and zenith wet delay.
double[]	computeZenithDelay(GeodeticPoint point, AbsoluteDate date)	This method allows the computation of the zenith hydrostatic and zenith wet delay.
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.
static MendesPavlisModel	getStandardModel(double lambda, Unit lambdaUnits)	Create a new Mendes-Pavlis model using a standard atmosphere model.
<T extends CalculusFieldElement<T>> T[]	mappingFactors(FieldTrackingCoordinates<T> trackingCoordinates, FieldGeodeticPoint<T> point, FieldAbsoluteDate<T> date)	With the Mendes Pavlis tropospheric model, the mapping function is not split into hydrostatic and wet component.
double[]	mappingFactors(TrackingCoordinates trackingCoordinates, GeodeticPoint point, AbsoluteDate date)	With the Mendes Pavlis tropospheric model, the mapping function is not split into hydrostatic and wet component.
<T extends CalculusFieldElement<T>> FieldTroposphericDelay<T>	pathDelay(FieldTrackingCoordinates<T> trackingCoordinates, FieldGeodeticPoint<T> point, T[] parameters, FieldAbsoluteDate<T> date)	Calculates the tropospheric path delay for the signal path from a ground station to a satellite.
TroposphericDelay	pathDelay(TrackingCoordinates trackingCoordinates, GeodeticPoint point, double[] parameters, AbsoluteDate 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 Details

MendesPavlisModel

public MendesPavlisModel(PressureTemperatureHumidityProvider pthProvider,
 double lambda,
 Unit lambdaUnits)

Create a new Mendes-Pavlis model for the troposphere.

Parameters:

pthProvider - provider for atmospheric pressure, temperature and humidity at the station

lambda - laser wavelength

lambdaUnits - units in which lambda is given

Since:

12.1

See Also:

• TroposphericModelUtils.MICRO_M
• TroposphericModelUtils.NANO_M

Method Details

getStandardModel

public static MendesPavlisModel getStandardModel(double lambda,
 Unit lambdaUnits)

Create a new Mendes-Pavlis model using a standard atmosphere model.

• altitude: 0m
• temperature: 18 degree Celsius
• pressure: 1013.25 hPa
• humidity: 50%

Parameters:

lambda - laser wavelength, µm

lambdaUnits - units in which lambda is given

Returns:

a Mendes-Pavlis model with standard environmental values

Since:

12.1

See Also:

• TroposphericModelUtils.MICRO_M
• TroposphericModelUtils.NANO_M

pathDelay

public TroposphericDelay pathDelay(TrackingCoordinates trackingCoordinates,
 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 TroposphericModel

Parameters:

trackingCoordinates - tracking coordinates of the satellite

point - station location

parameters - tropospheric model parameters

date - current date

Returns:

the path delay due to the troposphere

pathDelay

public <T extends CalculusFieldElement<T>>
FieldTroposphericDelay<T> pathDelay(FieldTrackingCoordinates<T> trackingCoordinates,
 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 TroposphericModel

Type Parameters:

T - type of the elements

Parameters:

trackingCoordinates - tracking coordinates of the satellite

point - station location

parameters - tropospheric model parameters at current date

date - current date

Returns:

the path delay due to the troposphere

computeZenithDelay

public double[] computeZenithDelay(GeodeticPoint point,
 AbsoluteDate date)

This method allows the computation of the zenith hydrostatic and zenith wet delay. The resulting element is an array having the following form:

• double[0] = D_hz → zenith hydrostatic delay
• double[1] = D_wz → zenith wet delay

Parameters:

point - station location

date - current date

Returns:

a two components array containing the zenith hydrostatic and wet delays.

computeZenithDelay

public <T extends CalculusFieldElement<T>> T[] computeZenithDelay(FieldGeodeticPoint<T> point,
 FieldAbsoluteDate<T> date)

This method allows the computation of the zenith hydrostatic and zenith wet delay. The resulting element is an array having the following form:

• T[0] = D_hz → zenith hydrostatic delay
• T[1] = D_wz → zenith wet delay

Type Parameters:

T - type of the elements

Parameters:

point - station location

date - current date

Returns:

a two components array containing the zenith hydrostatic and wet delays.

mappingFactors

public double[] mappingFactors(TrackingCoordinates trackingCoordinates,
 GeodeticPoint point,
 AbsoluteDate date)

With the Mendes Pavlis tropospheric model, the mapping function is not split into hydrostatic and wet component.

Therefore, the two components of the resulting array are equals.

• double[0] = m(e) → total mapping function
• double[1] = m(e) → total mapping function

The total delay will thus be computed as:
δ = D_hz * m(e) + D_wz * m(e)
δ = (D_hz + D_wz) * m(e) = δ_z * m(e)

Specified by:

mappingFactors in interface TroposphereMappingFunction

Parameters:

trackingCoordinates - tracking coordinates of the satellite

point - station location

date - current date

Returns:

a two components array containing the hydrostatic and wet mapping functions.

mappingFactors

public <T extends CalculusFieldElement<T>> T[] mappingFactors(FieldTrackingCoordinates<T> trackingCoordinates,
 FieldGeodeticPoint<T> point,
 FieldAbsoluteDate<T> date)

With the Mendes Pavlis tropospheric model, the mapping function is not split into hydrostatic and wet component.

Therefore, the two components of the resulting array are equals.

• double[0] = m(e) → total mapping function
• double[1] = m(e) → total mapping function

The total delay will thus be computed as:
δ = D_hz * m(e) + D_wz * m(e)
δ = (D_hz + D_wz) * m(e) = δ_z * m(e)

Specified by:

mappingFactors in interface TroposphereMappingFunction

Type Parameters:

T - type of the elements

Parameters:

trackingCoordinates - tracking coordinates of the satellite

point - station location

date - current date

Returns:

a two components array containing the hydrostatic and wet mapping functions.

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters.

Specified by:

getParametersDrivers in interface ParameterDriversProvider

Returns:

drivers for parameters