StateVector.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,
- * 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.files.ccsds.ndm.odm;
- import java.util.Arrays;
- import org.hipparchus.geometry.euclidean.threed.Vector3D;
- import org.orekit.errors.OrekitException;
- import org.orekit.errors.OrekitMessages;
- import org.orekit.files.ccsds.section.CommentsContainer;
- import org.orekit.time.AbsoluteDate;
- import org.orekit.utils.TimeStampedPVCoordinates;
- /** Container for state vector data.
- * @author Luc Maisonobe
- * @since 11.0
- */
- public class StateVector extends CommentsContainer {
- /** Epoch of state vector and optional Keplerian elements. */
- private AbsoluteDate epoch;
- /** Position vector (m). */
- private double[] position;
- /** Velocity vector (m/s). */
- private double[] velocity;
- /** Accekeration vector (m/s²). */
- private double[] acceleration;
- /** Create an empty data set.
- */
- public StateVector() {
- position = new double[3];
- velocity = new double[3];
- acceleration = new double[3];
- Arrays.fill(position, Double.NaN);
- Arrays.fill(velocity, Double.NaN);
- Arrays.fill(acceleration, Double.NaN);
- }
- /** {@inheritDoc} */
- @Override
- public void validate(final double version) {
- super.validate(version);
- checkNotNull(epoch, StateVectorKey.EPOCH);
- if (Double.isNaN(position[0] + position[1] + position[2])) {
- throw new OrekitException(OrekitMessages.UNINITIALIZED_VALUE_FOR_KEY, "{X|Y|Z}");
- }
- if (Double.isNaN(velocity[0] + velocity[1] + velocity[2])) {
- throw new OrekitException(OrekitMessages.UNINITIALIZED_VALUE_FOR_KEY, "{X|Y|Z}_DOT");
- }
- }
- /** Get epoch of state vector, Keplerian elements and covariance matrix data.
- * @return epoch the epoch
- */
- public AbsoluteDate getEpoch() {
- return epoch;
- }
- /** Set epoch of state vector, Keplerian elements and covariance matrix data.
- * @param epoch the epoch to be set
- */
- public void setEpoch(final AbsoluteDate epoch) {
- refuseFurtherComments();
- this.epoch = epoch;
- }
- /**
- * Set position component.
- * @param index component index (counting from 0)
- * @param value position component
- */
- public void setP(final int index, final double value) {
- refuseFurtherComments();
- position[index] = value;
- }
- /**
- * Set velocity component.
- * @param index component index (counting from 0)
- * @param value velocity component
- */
- public void setV(final int index, final double value) {
- refuseFurtherComments();
- velocity[index] = value;
- }
- /**
- * Set acceleration component.
- * @param index component index (counting from 0)
- * @param value acceleration component
- */
- public void setA(final int index, final double value) {
- refuseFurtherComments();
- acceleration[index] = value;
- }
- /** Check if state contains acceleration data.
- * @return true is state contains acceleration data
- */
- public boolean hasAcceleration() {
- return !Double.isNaN(acceleration[0] + acceleration[1] + acceleration[2]);
- }
- /** Convert to {@link TimeStampedPVCoordinates}.
- * @return a new {@link TimeStampedPVCoordinates}
- */
- public TimeStampedPVCoordinates toTimeStampedPVCoordinates() {
- return new TimeStampedPVCoordinates(epoch,
- new Vector3D(position),
- new Vector3D(velocity),
- hasAcceleration() ? new Vector3D(acceleration) : Vector3D.ZERO);
- }
- }