Package org.orekit.models.earth
Class ViennaThreeModel
- java.lang.Object
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- org.orekit.models.earth.ViennaThreeModel
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- All Implemented Interfaces:
Serializable
,DiscreteTroposphericModel
,MappingFunction
public class ViennaThreeModel extends Object implements DiscreteTroposphericModel
The Vienna3 tropospheric delay model for radio techniques. The Vienna model data are given with a time interval of 6 hours.The empirical coefficients bh, bw, ch and cw are computed with spherical harmonics. In that respect, they are considerably more advanced than those of
VMF1
model.- Author:
- Bryan Cazabonne
- See Also:
Landskron D (2017) Modeling tropospheric delays for space geodetic techniques. Dissertation, Department of Geodesy and Geoinformation, TU Wien, Supervisor: J. Böhm. http://repositum.tuwien.ac.at/urn:nbn:at:at-ubtuw:1-100249
, Serialized Form
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Constructor Summary
Constructors Constructor Description ViennaThreeModel(double[] coefficientA, double[] zenithDelay, double latitude, double longitude)
Build a new instance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description double[]
computeZenithDelay(double height, double[] parameters, AbsoluteDate date)
This method allows the computation of the zenith hydrostatic and zenith wet delay.<T extends org.hipparchus.RealFieldElement<T>>
T[]computeZenithDelay(T height, T[] parameters, FieldAbsoluteDate<T> date)
This method allows the computation of the zenith hydrostatic and zenith wet delay.List<ParameterDriver>
getParametersDrivers()
Get the drivers for tropospheric model parameters.double[]
mappingFactors(double elevation, double height, double[] parameters, AbsoluteDate date)
This method allows the computation of the hydrostatic and wet mapping functions.<T extends org.hipparchus.RealFieldElement<T>>
T[]mappingFactors(T elevation, T height, T[] parameters, FieldAbsoluteDate<T> date)
This method allows the computation of the hydrostatic and wet mapping functions.double
pathDelay(double elevation, double height, double[] parameters, AbsoluteDate date)
Calculates the tropospheric path delay for the signal path from a ground station to a satellite.<T extends org.hipparchus.RealFieldElement<T>>
TpathDelay(T elevation, T height, 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
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Methods inherited from interface org.orekit.models.earth.MappingFunction
getParameters, getParameters
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Constructor Detail
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ViennaThreeModel
public ViennaThreeModel(double[] coefficientA, double[] zenithDelay, double latitude, double longitude)
Build a new instance.- Parameters:
coefficientA
- The a coefficients for the computation of the wet and hydrostatic mapping functions.zenithDelay
- Values of hydrostatic and wet delayslatitude
- geodetic latitude of the station, in radianslongitude
- geodetic latitude of the station, in radians
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Method Detail
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mappingFactors
public double[] mappingFactors(double elevation, double height, double[] parameters, AbsoluteDate date)
This method allows the computation of the hydrostatic and wet mapping functions. The resulting element is an array having the following form:- double[0] = mh(e) → hydrostatic mapping function
- double[1] = mw(e) → wet mapping function
- Specified by:
mappingFactors
in interfaceMappingFunction
- Parameters:
elevation
- the elevation of the satellite, in radians.height
- the height of the station in m above sea level.parameters
- tropospheric model parameters.date
- current date- Returns:
- a two components array containing the hydrostatic and wet mapping functions.
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mappingFactors
public <T extends org.hipparchus.RealFieldElement<T>> T[] mappingFactors(T elevation, T height, T[] parameters, FieldAbsoluteDate<T> date)
This method allows the computation of the hydrostatic and wet mapping functions. The resulting element is an array having the following form:- T[0] = mh(e) → hydrostatic mapping function
- T[1] = mw(e) → wet mapping function
- Specified by:
mappingFactors
in interfaceMappingFunction
- Type Parameters:
T
- type of the elements- Parameters:
elevation
- the elevation of the satellite, in radians.height
- the height of the station in m above sea level.parameters
- tropospheric model parameters.date
- current date- Returns:
- a two components array containing the hydrostatic and wet mapping functions.
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pathDelay
public double pathDelay(double elevation, double height, double[] parameters, AbsoluteDate date)
Calculates the tropospheric path delay for the signal path from a ground station to a satellite.- Specified by:
pathDelay
in interfaceDiscreteTroposphericModel
- Parameters:
elevation
- the elevation of the satellite, in radiansheight
- the height of the station in m above sea levelparameters
- tropospheric model parameters.date
- current date- Returns:
- the path delay due to the troposphere in m
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pathDelay
public <T extends org.hipparchus.RealFieldElement<T>> T pathDelay(T elevation, T height, 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 interfaceDiscreteTroposphericModel
- Type Parameters:
T
- type of the elements- Parameters:
elevation
- the elevation of the satellite, in radiansheight
- the height of the station in m above sea levelparameters
- tropospheric model parameters.date
- current date- Returns:
- the path delay due to the troposphere in m
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computeZenithDelay
public double[] computeZenithDelay(double height, double[] parameters, 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] = Dhz → zenith hydrostatic delay
- double[1] = Dwz → zenith wet delay
- Specified by:
computeZenithDelay
in interfaceDiscreteTroposphericModel
- Parameters:
height
- the height of the station in m above sea level.parameters
- tropospheric model parameters.date
- current date- Returns:
- a two components array containing the zenith hydrostatic and wet delays.
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computeZenithDelay
public <T extends org.hipparchus.RealFieldElement<T>> T[] computeZenithDelay(T height, T[] parameters, 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] = Dhz → zenith hydrostatic delay
- T[1] = Dwz → zenith wet delay
- Specified by:
computeZenithDelay
in interfaceDiscreteTroposphericModel
- Type Parameters:
T
- type of the elements- Parameters:
height
- the height of the station in m above sea level.parameters
- tropospheric model parameters.date
- current date- Returns:
- a two components array containing the zenith hydrostatic and wet delays.
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getParametersDrivers
public List<ParameterDriver> getParametersDrivers()
Get the drivers for tropospheric model parameters.- Specified by:
getParametersDrivers
in interfaceMappingFunction
- Returns:
- drivers for tropospheric model parameters
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