CartesianCovarianceWriter.java
/* Copyright 2002-2024 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.io.IOException;
import org.hipparchus.linear.RealMatrix;
import org.orekit.files.ccsds.definitions.Units;
import org.orekit.files.ccsds.section.AbstractWriter;
import org.orekit.files.ccsds.utils.generation.Generator;
/** Writer for covariance matrix data.
* @author Luc Maisonobe
* @since 11.0
*/
public class CartesianCovarianceWriter extends AbstractWriter {
/** Covariance matrix block. */
private final CartesianCovariance covariance;
/** Create a writer.
* @param xmlTag name of the XML tag surrounding the section
* @param kvnTag name of the KVN tag surrounding the section (may be null)
* @param covariance covariance matrix to write
*/
public CartesianCovarianceWriter(final String xmlTag, final String kvnTag,
final CartesianCovariance covariance) {
super(xmlTag, kvnTag);
this.covariance = covariance;
}
/** {@inheritDoc} */
@Override
protected void writeContent(final Generator generator) throws IOException {
final RealMatrix matrix = covariance.getCovarianceMatrix();
// covariance block
generator.writeComments(covariance.getComments());
// note that there are no epochs in the OPM/OMM covariance matrices (but there are epochs in OEM covariance matrices)
generator.writeEntry(CartesianCovarianceKey.COV_REF_FRAME.name(), covariance.getReferenceFrame().getName(), null, false);
generator.writeEntry(CartesianCovarianceKey.CX_X.name(), matrix.getEntry(0, 0), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CY_X.name(), matrix.getEntry(1, 0), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CY_Y.name(), matrix.getEntry(1, 1), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_X.name(), matrix.getEntry(2, 0), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_Y.name(), matrix.getEntry(2, 1), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_Z.name(), matrix.getEntry(2, 2), Units.KM2, true);
generator.writeEntry(CartesianCovarianceKey.CX_DOT_X.name(), matrix.getEntry(3, 0), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CX_DOT_Y.name(), matrix.getEntry(3, 1), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CX_DOT_Z.name(), matrix.getEntry(3, 2), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CX_DOT_X_DOT.name(), matrix.getEntry(3, 3), Units.KM2_PER_S2, true);
generator.writeEntry(CartesianCovarianceKey.CY_DOT_X.name(), matrix.getEntry(4, 0), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CY_DOT_Y.name(), matrix.getEntry(4, 1), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CY_DOT_Z.name(), matrix.getEntry(4, 2), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CY_DOT_X_DOT.name(), matrix.getEntry(4, 3), Units.KM2_PER_S2, true);
generator.writeEntry(CartesianCovarianceKey.CY_DOT_Y_DOT.name(), matrix.getEntry(4, 4), Units.KM2_PER_S2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_X.name(), matrix.getEntry(5, 0), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_Y.name(), matrix.getEntry(5, 1), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_Z.name(), matrix.getEntry(5, 2), Units.KM2_PER_S, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_X_DOT.name(), matrix.getEntry(5, 3), Units.KM2_PER_S2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_Y_DOT.name(), matrix.getEntry(5, 4), Units.KM2_PER_S2, true);
generator.writeEntry(CartesianCovarianceKey.CZ_DOT_Z_DOT.name(), matrix.getEntry(5, 5), Units.KM2_PER_S2, true);
}
}