Package org.orekit.propagation.conversion

Class EcksteinHechlerPropagatorBuilder

    • Constructor Detail

      • EcksteinHechlerPropagatorBuilder

        public EcksteinHechlerPropagatorBuilder​(Orbit templateOrbit,
                                        UnnormalizedSphericalHarmonicsProvider provider,
                                        PositionAngleType positionAngleType,
                                        double positionScale)
        Build a new instance.

        The template orbit is used as a model to create initial orbit. It defines the inertial frame, the central attraction coefficient, the orbit type, and is also used together with the positionScale to convert from the normalized parameters used by the callers of this builder to the real orbital parameters. The default attitude provider is aligned with the orbit's inertial frame.

        Parameters:
        templateOrbit - reference orbit from which real orbits will be built (note that the mu from this orbit will be overridden with the mu from the provider)
        provider - for un-normalized zonal coefficients
        positionAngleType - position angle type to use
        positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)
        Since:
        8.0
        See Also:
        EcksteinHechlerPropagatorBuilder(Orbit, UnnormalizedSphericalHarmonicsProvider, PositionAngleType, double, AttitudeProvider)

      • EcksteinHechlerPropagatorBuilder

        public EcksteinHechlerPropagatorBuilder​(Orbit templateOrbit,
                                        UnnormalizedSphericalHarmonicsProvider provider,
                                        PositionAngleType positionAngleType,
                                        double positionScale,
                                        AttitudeProvider attitudeProvider)
        Build a new instance.

        The template orbit is used as a model to create initial orbit. It defines the inertial frame, the central attraction coefficient, the orbit type, and is also used together with the positionScale to convert from the normalized parameters used by the callers of this builder to the real orbital parameters.

        Parameters:
        templateOrbit - reference orbit from which real orbits will be built (note that the mu from this orbit will be overridden with the mu from the provider)
        provider - for un-normalized zonal coefficients
        positionAngleType - position angle type to use
        positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)
        attitudeProvider - attitude law to use.
        Since:
        10.1

      • EcksteinHechlerPropagatorBuilder

        public EcksteinHechlerPropagatorBuilder​(Orbit templateOrbit,
                                        double referenceRadius,
                                        double mu,
                                        TideSystem tideSystem,
                                        double c20,
                                        double c30,
                                        double c40,
                                        double c50,
                                        double c60,
                                        OrbitType orbitType,
                                        PositionAngleType positionAngleType,
                                        double positionScale)
        Build a new instance.

        The template orbit is used as a model to create initial orbit. It defines the inertial frame, the central attraction coefficient, the orbit type, and is also used together with the positionScale to convert from the normalized parameters used by the callers of this builder to the real orbital parameters.

        Parameters:
        templateOrbit - reference orbit from which real orbits will be built (note that the mu from this orbit will be overridden with the mu from the provider)
        referenceRadius - reference radius of the Earth for the potential model (m)
        mu - central attraction coefficient (m³/s²)
        tideSystem - tide system
        c20 - un-normalized zonal coefficient (about -1.08e-3 for Earth)
        c30 - un-normalized zonal coefficient (about +2.53e-6 for Earth)
        c40 - un-normalized zonal coefficient (about +1.62e-6 for Earth)
        c50 - un-normalized zonal coefficient (about +2.28e-7 for Earth)
        c60 - un-normalized zonal coefficient (about -5.41e-7 for Earth)
        orbitType - orbit type to use
        positionAngleType - position angle type to use
        positionScale - scaling factor used for orbital parameters normalization (typically set to the expected standard deviation of the position)
        Since:
        8.0
        See Also:
        EcksteinHechlerPropagatorBuilder(Orbit, UnnormalizedSphericalHarmonicsProvider, PositionAngleType, double, AttitudeProvider)

    • Method Detail

      • buildPropagator

        public Propagator buildPropagator​(double[] normalizedParameters)
        Build a propagator.
        Parameters:
        normalizedParameters - normalized values for the selected parameters
        Returns:
        an initialized propagator

      • buildLeastSquaresModel

        public AbstractBatchLSModel buildLeastSquaresModel​(PropagatorBuilder[] builders,
                                                   List<ObservedMeasurement<?>> measurements,
                                                   ParameterDriversList estimatedMeasurementsParameters,
                                                   ModelObserver observer)
        Build a new batch least squares model.
        Parameters:
        builders - builders to use for propagation
        measurements - measurements
        estimatedMeasurementsParameters - estimated measurements parameters
        observer - observer to be notified at model calls
        Returns:
        a new model for the Batch Least Squares orbit determination