GRAPHICCombination.java
- /* Copyright 2002-2023 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.estimation.measurements.gnss;
- import org.orekit.gnss.SatelliteSystem;
- /**
- * GRoup And Phase Ionospheric Calibration (GRAPHIC) combination.
- * <p>
- * This combination is a ionosphere-free single frequency
- * combination of measurements.
- * </p>
- * <pre>
- * mf = 0.5 * (Φf + Rf)
- * </pre>
- * With:
- * <ul>
- * <li>mf : GRAPHIC measurement.</li>
- * <li>Φf : Phase measurement.</li>
- * <li>Rf : Code measurement.</li>
- * <li>f : Frequency.</li>
- * </ul>
- * @author Bryan Cazabonne
- * @since 10.1
- */
- public class GRAPHICCombination extends AbstractSingleFrequencyCombination {
- /**
- * Package private constructor for the factory.
- * @param system satellite system for which the combination is applied
- */
- GRAPHICCombination(final SatelliteSystem system) {
- super(CombinationType.GRAPHIC, system);
- }
- /** {@inheritDoc} */
- @Override
- protected double getCombinedValue(final double phase, final double pseudoRange) {
- // Combination does not depend on the frequency
- return 0.5 * (phase + pseudoRange);
- }
- }