AbsolutePartialDerivativesEquations.java
/* Copyright 2002-2022 CS GROUP
* Licensed to CS GROUP (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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*/
package org.orekit.propagation.numerical;
import org.orekit.errors.OrekitException;
import org.orekit.errors.OrekitMessages;
import org.orekit.forces.ForceModel;
import org.orekit.propagation.SpacecraftState;
import org.orekit.propagation.integration.AdditionalDerivativesProvider;
import org.orekit.utils.ParameterDriver;
/** {@link AdditionalDerivativesProvider derivatives provider} computing the partial derivatives
* of the state (orbit) with respect to initial state and force models parameters.
* <p>
* This set of equations are automatically added to a {@link NumericalPropagator numerical propagator}
* in order to compute partial derivatives of the orbit along with the orbit itself. This is
* useful for example in orbit determination applications.
* </p>
* <p>
* The partial derivatives with respect to initial state can be either dimension 6
* (orbit only) or 7 (orbit and mass).
* </p>
* <p>
* The partial derivatives with respect to force models parameters has a dimension
* equal to the number of selected parameters. Parameters selection is implemented at
* {@link ForceModel force models} level. Users must retrieve a {@link ParameterDriver
* parameter driver} using {@link ForceModel#getParameterDriver(String)} and then
* select it by calling {@link ParameterDriver#setSelected(boolean) setSelected(true)}.
* </p>
* <p>
* If several force models provide different {@link ParameterDriver drivers} for the
* same parameter name, selecting any of these drivers has the side effect of
* selecting all the drivers for this shared parameter. In this case, the partial
* derivatives will be the sum of the partial derivatives contributed by the
* corresponding force models. This case typically arises for central attraction
* coefficient, which has an influence on {@link org.orekit.forces.gravity.NewtonianAttraction
* Newtonian attraction}, {@link org.orekit.forces.gravity.HolmesFeatherstoneAttractionModel
* gravity field}, and {@link org.orekit.forces.gravity.Relativity relativity}.
* </p>
* @deprecated as of 11.1, this class is not used anymore
* @author Vincent Mouraux
* @author Bryan Cazabonne
* @since 10.2
*/
@Deprecated
public class AbsolutePartialDerivativesEquations extends PartialDerivativesEquations {
/** Name. */
private final String name;
/** Simple constructor.
* <p>
* Upon construction, this set of equations is <em>automatically</em> added to
* the propagator by calling its {@link
* NumericalPropagator#addAdditionalDerivativesProvider(AdditionalDerivativesProvider)} method. So
* there is no need to call this method explicitly for these equations.
* </p>
* @param name name of the partial derivatives equations
* @param propagator the propagator that will handle the orbit propagation
*/
public AbsolutePartialDerivativesEquations(final String name, final NumericalPropagator propagator) {
super(name, propagator);
this.name = name;
}
/** Get a mapper between two-dimensional Jacobians and one-dimensional additional state.
* @return a mapper between two-dimensional Jacobians and one-dimensional additional state,
* with the same name as the instance
* @see #setInitialJacobians(SpacecraftState)
* @see #setInitialJacobians(SpacecraftState, double[][], double[][])
*/
@Override
public AbsoluteJacobiansMapper getMapper() {
if (!isInitialize()) {
throw new OrekitException(OrekitMessages.STATE_JACOBIAN_NOT_INITIALIZED);
}
return new AbsoluteJacobiansMapper(name, getSelectedParameters());
}
}