NoFarPlanetsTerm.java

/* Copyright 2002-2015 CS Systèmes d'Information
 * Licensed to CS Systèmes d'Information (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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.orekit.data;

import org.apache.commons.math3.RealFieldElement;

/** Class for terms that do not depend on far planets and some other elements.
 * @param <T> the type of the field elements
 * @author Luc Maisonobe
 */
class NoFarPlanetsTerm<T extends RealFieldElement<T>> extends SeriesTerm<T> {

    /** Coefficient for mean anomaly of the Moon. */
    private final int cL;

    /** Coefficient for L - Ω where L is the mean longitude of the Moon. */
    private final int cF;

    /** Coefficient for mean elongation of the Moon from the Sun. */
    private final int cD;

    /** Coefficient for mean longitude of the ascending node of the Moon. */
    private final int cOmega;

    /** Coefficient for mean Mercury longitude. */
    private final int cMe;

    /** Coefficient for mean Venus longitude. */
    private final int cVe;

    /** Coefficient for mean Earth longitude. */
    private final int cE;

    /** Coefficient for mean Mars longitude. */
    private final int cMa;

    /** Coefficient for mean Jupiter longitude. */
    private final int cJu;

    /** Coefficient for mean Saturn longitude. */
    private final int cSa;

    /** Build a planetary term for nutation series.
     * @param cL coefficient for mean anomaly of the Moon
     * @param cF coefficient for L - Ω where L is the mean longitude of the Moon
     * @param cD coefficient for mean elongation of the Moon from the Sun
     * @param cOmega coefficient for mean longitude of the ascending node of the Moon
     * @param cMe coefficient for mean Mercury longitude
     * @param cVe coefficient for mean Venus longitude
     * @param cE coefficient for mean Earth longitude
     * @param cMa coefficient for mean Mars longitude
     * @param cJu coefficient for mean Jupiter longitude
     * @param cSa coefficient for mean Saturn longitude
     */
    public NoFarPlanetsTerm(final int cL, final int cF, final int cD, final int cOmega,
                            final int cMe, final int cVe, final int cE, final int cMa,
                            final int cJu, final int cSa) {
        this.cL     = cL;
        this.cF     = cF;
        this.cD     = cD;
        this.cOmega = cOmega;
        this.cMe    = cMe;
        this.cVe    = cVe;
        this.cE     = cE;
        this.cMa    = cMa;
        this.cJu    = cJu;
        this.cSa    = cSa;
    }

    /** {@inheritDoc} */
    protected double argument(final BodiesElements elements) {
        return cL * elements.getL() + cF * elements.getF() +
               cD * elements.getD() + cOmega * elements.getOmega() +
               cMe * elements.getLMe() + cVe * elements.getLVe() + cE  * elements.getLE() +
               cMa * elements.getLMa() + cJu * elements.getLJu() + cSa * elements.getLSa();

    }

    /** {@inheritDoc} */
    protected T argument(final FieldBodiesElements<T> elements) {
        return elements.getL().multiply(cL).
                add(elements.getF().multiply(cF)).
                add(elements.getD().multiply(cD)).
                add(elements.getOmega().multiply(cOmega)).
                add(elements.getLMe().multiply(cMe)).
                add(elements.getLVe().multiply(cVe)).
                add(elements.getLE().multiply(cE)).
                add(elements.getLMa().multiply(cMa)).
                add(elements.getLJu().multiply(cJu)).
                add(elements.getLSa().multiply(cSa));

    }

}