KlobucharMessageWriter.java

/* Copyright 2022-2025 Thales Alenia Space
 * 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.rinex.navigation.writers.ionosphere;

import org.orekit.files.rinex.navigation.IonosphereKlobucharMessage;
import org.orekit.files.rinex.navigation.RecordType;
import org.orekit.files.rinex.navigation.RinexNavigationHeader;
import org.orekit.files.rinex.navigation.RinexNavigationWriter;
import org.orekit.files.rinex.navigation.writers.NavigationMessageWriter;
import org.orekit.gnss.SatelliteSystem;

import java.io.IOException;

/** Writer for Klobuchar model ionospheric messages.
 * @author Luc Maisonobe
 * @since 14.0
 */
public class KlobucharMessageWriter extends NavigationMessageWriter<IonosphereKlobucharMessage> {

    /** {@inheritDoc} */
    @Override
    public void writeMessage(final String identifier, final IonosphereKlobucharMessage message,
                             final RinexNavigationHeader header, final RinexNavigationWriter writer)
        throws IOException {

        // TYPE / SV / MSG
        if (message.getSystem() == SatelliteSystem.BEIDOU && header.getFormatVersion() >= 4.02) {
            final String subType = message.getRegionCode() == null ? "" : message.getRegionCode().getStringId();
            writeTypeSvMsg(RecordType.ION, message.getIdentifier(),
                           new IonosphereKlobucharMessage(message.getSystem(), message.getPrn(),
                                                          message.getNavigationMessageType(),
                                                          subType),
                           header, writer);
        } else {
            writeTypeSvMsg(RecordType.ION, message.getIdentifier(), message, header, writer);
        }

        // ION MESSAGE LINE - 0
        writer.indentLine(header);
        writer.writeDate(message.getTransmitTime(), message.getSystem());
        writer.writeDouble(message.getAlpha()[0], IonosphereKlobucharMessage.S_PER_SC_N0);
        writer.writeDouble(message.getAlpha()[1], IonosphereKlobucharMessage.S_PER_SC_N1);
        writer.writeDouble(message.getAlpha()[2], IonosphereKlobucharMessage.S_PER_SC_N2);
        writer.finishLine();

        // ION MESSAGE LINE - 1
        writer.indentLine(header);
        writer.writeDouble(message.getAlpha()[3], IonosphereKlobucharMessage.S_PER_SC_N3);
        writer.writeDouble(message.getBeta()[0], IonosphereKlobucharMessage.S_PER_SC_N0);
        writer.writeDouble(message.getBeta()[1], IonosphereKlobucharMessage.S_PER_SC_N1);
        writer.writeDouble(message.getBeta()[2], IonosphereKlobucharMessage.S_PER_SC_N2);
        writer.finishLine();

        // ION MESSAGE LINE - 2
        writer.indentLine(header);
        writer.writeDouble(message.getBeta()[3], IonosphereKlobucharMessage.S_PER_SC_N3);
        if (header.getFormatVersion() < 4.015) {
            writer.writeInt(message.getRegionCode().getIntegerId());
        }
        writer.finishLine();

    }

}