Class KalmanEstimatorBuilder


  • public class KalmanEstimatorBuilder
    extends Object
    Builder for a Kalman filter estimator.
    Since:
    9.2
    Author:
    Romain Gerbaud, Maxime Journot
    • Constructor Detail

      • KalmanEstimatorBuilder

        public KalmanEstimatorBuilder()
        Default constructor. Set an extended Kalman filter, with linearized covariance prediction.
    • Method Detail

      • decomposer

        public KalmanEstimatorBuilder decomposer​(MatrixDecomposer matrixDecomposer)
        Configure the matrix decomposer.
        Parameters:
        matrixDecomposer - decomposer to use for the correction phase
        Returns:
        this object.
      • addPropagationConfiguration

        public KalmanEstimatorBuilder addPropagationConfiguration​(PropagatorBuilder builder,
                                                                  CovarianceMatrixProvider provider)
        Add a propagation configuration.

        This method must be called once for each propagator to managed with the Kalman estimator. The propagators order in the Kalman filter will be the call order.

        The provider should return a matrix with dimensions and ordering consistent with the builder configuration. The first 6 rows/columns correspond to the 6 orbital parameters. The remaining elements correspond to the subset of propagation parameters that are estimated, in the same order as propagatorBuilder.getPropagationParametersDrivers().getDrivers() (but filtering out the non selected drivers).

        Parameters:
        builder - The propagator builder to use in the Kalman filter.
        provider - The process noise matrices provider to use, consistent with the builder. This parameter can be equal to null if the input builder is an EphemerisPropagatorBuilder. Indeed, for ephemeris based estimation only measurement parameters are estimated. Therefore, the covariance related to dynamical parameters can be null.
        Returns:
        this object.
        See Also:
        getProcessNoiseMatrix(previous, current)
      • estimatedMeasurementsParameters

        public KalmanEstimatorBuilder estimatedMeasurementsParameters​(ParameterDriversList estimatedMeasurementsParams,
                                                                      CovarianceMatrixProvider provider)
        Configure the estimated measurement parameters.

        If this method is not called, no measurement parameters will be estimated.

        Parameters:
        estimatedMeasurementsParams - The estimated measurements' parameters list.
        provider - covariance matrix provider for the estimated measurement parameters
        Returns:
        this object.
        Since:
        10.3