LeastSquareObserver.java

import org.hipparchus.optim.nonlinear.vector.leastsquares.LeastSquaresProblem.Evaluation;
import org.orekit.errors.OrekitException;
import org.orekit.estimation.leastsquares.BatchLSObserver;
import org.orekit.estimation.measurements.EstimationsProvider;
import org.orekit.orbits.CartesianOrbit;
import org.orekit.orbits.KeplerianOrbit;
import org.orekit.orbits.Orbit;
import org.orekit.utils.ParameterDriversList;

public class LeastSquareObserver implements BatchLSObserver {

    @Override
    public void evaluationPerformed(int iterationsCount, int evaluationsCount, Orbit[] orbits,
            ParameterDriversList estimatedOrbitalParameters, ParameterDriversList estimatedPropagatorParameters,
            ParameterDriversList estimatedMeasurementsParameters, EstimationsProvider evaluationsProvider,
            Evaluation lspEvaluation) throws OrekitException {

        System.out.println("*** Least Square Observer");
        System.out.println("Iterations, evaluations: " + iterationsCount + " " + evaluationsCount);
        System.out.println("Orbit: " + new CartesianOrbit(orbits[0]));
        System.out.println("Orbit: " + new KeplerianOrbit(orbits[0]));
        System.out.println("RMS: " + lspEvaluation.getRMS());
        System.out.println("*** End of Least Square Observer");

    }

}