org.orekit.models.earth.troposphere

Interface DiscreteTroposphericModel

All Superinterfaces:

MappingFunction

All Known Implementing Classes:

EstimatedTroposphericModel, FixedTroposphericDelay, MariniMurrayModel, MendesPavlisModel, SaastamoinenModel, ViennaOneModel, ViennaThreeModel

public interface DiscreteTroposphericModel
extends MappingFunction

Defines a tropospheric model, used to calculate the path delay imposed to electro-magnetic signals between an orbital satellite and a ground station.

Models that implement this interface split the delay into hydrostatic and non-hydrostatic part:

δ = δ_h + δ_nh

With:

• δ_h = hydrostatic delay
• δ_nh = non-hydrostatic (or wet) delay

Author:

Bryan Cazabonne

Method Summary

Modifier and Type	Method and Description
double[]	computeZenithDelay(double height, double[] parameters, AbsoluteDate date) This method allows the computation of the zenith hydrostatic and zenith wet delay.
<T extends RealFieldElement<T>> T[]	computeZenithDelay(T height, T[] parameters, FieldAbsoluteDate<T> date) This method allows the computation of the zenith hydrostatic and zenith wet delay.
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 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.

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

getParameters, getParameters, getParametersDrivers, mappingFactors, mappingFactors

Method Detail

pathDelay

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.

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:

the path delay due to the troposphere in m

pathDelay

<T extends 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.

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:

the path delay due to the troposphere in m

computeZenithDelay

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

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.

computeZenithDelay

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

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.