import org.orekit.orbits.OrbitType;
import org.orekit.orbits.PositionAngle;
import org.orekit.propagation.SpacecraftState;
import org.orekit.propagation.numerical.NumericalPropagator;
import org.orekit.utils.ParameterDriver;
<BUG>public class EstimationUtils {
private EstimationUtils() {</BUG>
}
public static ParameterFunction differentiate(final ParameterFunction function,
final ParameterDriver driver,

import org.orekit.orbits.OrbitType;
import org.orekit.orbits.PositionAngle;
import org.orekit.propagation.SpacecraftState;
import org.orekit.propagation.numerical.NumericalPropagator;
import org.orekit.utils.ParameterDriver;
public class EstimationUtils {
private static final DSFactory FACTORY = new DSFactory(1, 1);
private EstimationUtils() {
}
public static ParameterFunction differentiate(final ParameterFunction function,
final ParameterDriver driver,
