Class NiellMappingFunctionModel

  • All Implemented Interfaces:
    Serializable, MappingFunction

    public class NiellMappingFunctionModel
    extends Object
    implements MappingFunction
    The Niell Mapping Function model for radio wavelengths. This model is an empirical mapping function. It only needs the values of the station latitude, height and the date for the computations.

    With this model, the hydrostatic mapping function is time and latitude dependent whereas the wet mapping function is only latitude dependent.

    Author:
    Bryan Cazabonne
    See Also:
    Serialized Form
    • Constructor Detail

      • NiellMappingFunctionModel

        public NiellMappingFunctionModel​(double latitude)
        Buils a new instance.
        Parameters:
        latitude - geodetic latitude of the station, in radians
    • Method Detail

      • mappingFactors

        public double[] mappingFactors​(double elevation,
                                       double height,
                                       double[] parameters,
                                       AbsoluteDate date)
        Description copied from interface: MappingFunction
        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 interface MappingFunction
        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.
      • mappingFactors

        public <T extends org.hipparchus.RealFieldElement<T>> T[] mappingFactors​(T elevation,
                                                                                 T height,
                                                                                 T[] parameters,
                                                                                 FieldAbsoluteDate<T> date)
        Description copied from interface: MappingFunction
        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 interface MappingFunction
        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.