Package org.orekit.models.earth.troposphere

Class TimeSpanEstimatedModel

java.lang.Object
org.orekit.models.earth.troposphere.TimeSpanEstimatedModel
All Implemented Interfaces:
TroposphericModel, ParameterDriversProvider
public class TimeSpanEstimatedModel extends Object implements TroposphericModel
Time span estimated tropospheric model.

This class is closely related to EstimatedModel class.
The difference is that it has a TimeSpanMap of EstimatedModel objects as attribute.
The idea behind this model is to allow the user to design a tropospheric model that can see its physical parameters (total zenith delay) change with time, at dates chosen by the user.

Since:
10.2
Author:
Bryan Cazabonne

  • Field Details

    • DATE_BEFORE

      public static final String DATE_BEFORE
      Prefix for dates before in the tropospheric parameter drivers' name.
      See Also:

    • DATE_AFTER

      public static final String DATE_AFTER
      Prefix for dates after in the tropospheric parameter drivers' name.
      See Also:

  • Constructor Details

    • TimeSpanEstimatedModel

      @DefaultDataContext public TimeSpanEstimatedModel(EstimatedModel model)
      Constructor with default UTC time scale.
      Parameters:
      model - the initial model which going to be used for all the models initialization.

    • TimeSpanEstimatedModel

      public TimeSpanEstimatedModel(EstimatedModel model, TimeScale timeScale)
      Constructor with default UTC time scale.
      Parameters:
      model - the initial model which going to be used for all the models initialization.
      timeScale - timeScale Time scale used for the default names of the tropospheric parameter drivers

  • Method Details

    • getParametersDrivers

      public List<ParameterDriver> getParametersDrivers()
      Get the drivers for parameters.

      All the parameter drivers of all Estimated models are returned in an array. Models are ordered chronologically.

      Specified by:
      getParametersDrivers in interface ParameterDriversProvider
      Returns:
      drivers for parameters

    • addTroposphericModelValidBefore

      public void addTroposphericModelValidBefore(EstimatedModel model, AbsoluteDate latestValidityDate)
      Add an EstimatedTroposphericModel entry valid before a limit date.
      Using addTroposphericValidBefore(entry, t) will make entry valid in ]-∞, t[ (note the open bracket).
      Parameters:
      model - EstimatedTroposphericModel entry
      latestValidityDate - date before which the entry is valid (must be different from all dates already used for transitions)

    • addTroposphericModelValidAfter

      public void addTroposphericModelValidAfter(EstimatedModel model, AbsoluteDate earliestValidityDate)
      Add a EstimatedTroposphericModel entry valid after a limit date.
      Using addTroposphericModelValidAfter(entry, t) will make entry valid in [t, +∞[ (note the closed bracket).
      Parameters:
      model - EstimatedTroposphericModel entry
      earliestValidityDate - date after which the entry is valid (must be different from all dates already used for transitions)

    • getTroposphericModel

      public EstimatedModel getTroposphericModel(AbsoluteDate date)
      Get the EstimatedModel model valid at a date.
      Parameters:
      date - the date of validity
      Returns:
      the EstimatedTroposphericModel model valid at date

    • getFirstSpan

      public TimeSpanMap.Span<EstimatedModel> getFirstSpan()
      Get the first time span of the tropospheric model time span map.
      Returns:
      the first time span of the tropospheric model time span map
      Since:
      11.1

    • extractParameters

      public double[] extractParameters(double[] parameters, AbsoluteDate date)
      Extract the proper parameter drivers' values from the array in input of the pathDelay method. Parameters are filtered given an input date.
      Parameters:
      parameters - the input parameters array
      date - the date
      Returns:
      the parameters given the date

    • extractParameters

      public <T extends CalculusFieldElement<T>> T[] extractParameters(T[] parameters, FieldAbsoluteDate<T> date)
      Extract the proper parameter drivers' values from the array in input of the pathDelay method. Parameters are filtered given an input date.
      Type Parameters:
      T - extends CalculusFieldElements
      Parameters:
      parameters - the input parameters array
      date - the date
      Returns:
      the parameters given the date

    • 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