<BUG>import org.hipparchus.RealFieldElement;import org.hipparchus.analysis.differentiation.DerivativeStructure;</BUG><CONTEXT>package org.orekit.estimation.measurements;import org.hipparchus.Field;<extra_id_0>import org.hipparchus.geometry.euclidean.threed.FieldVector3D;import org.hipparchus.geometry.euclidean.threed.Vector3D;import org.hipparchus.geometry.euclidean.twod.Vector2D;</CONTEXT>
import org.hipparchus.analysis.differentiation.DSFactory;import org.hipparchus.analysis.differentiation.DerivativeStructure;