GLONASSScale.java
- /* Copyright 2002-2021 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.time;
- import org.hipparchus.CalculusFieldElement;
- /** GLONASS time scale.
- * <p>By convention, TGLONASS = UTC + 3 hours.</p>
- * <p>The time scale is defined in <a
- * href="http://www.spacecorp.ru/upload/iblock/1c4/cgs-aaixymyt%205.1%20ENG%20v%202014.02.18w.pdf">
- * Global Navigation Sattelite System GLONASS - Interface Control document</a>, version 5.1 2008
- * (the typo in the title is in the original document title).
- * </p>
- * <p>This is intended to be accessed thanks to {@link TimeScales},
- * so there is no public constructor.</p>
- * @author Luc Maisonobe
- * @see AbsoluteDate
- */
- public class GLONASSScale implements TimeScale {
- /** Serializable UID. */
- private static final long serialVersionUID = 20160331L;
- /** Constant offset with respect to UTC (3 hours). */
- private static final double OFFSET = 10800;
- /** UTC time scale. */
- private final UTCScale utc;
- /** Package private constructor for the factory.
- * @param utc underlying UTC scale
- */
- GLONASSScale(final UTCScale utc) {
- this.utc = utc;
- }
- /** {@inheritDoc} */
- @Override
- public double offsetFromTAI(final AbsoluteDate date) {
- return OFFSET + utc.offsetFromTAI(date);
- }
- /** {@inheritDoc} */
- @Override
- public <T extends CalculusFieldElement<T>> T offsetFromTAI(final FieldAbsoluteDate<T> date) {
- return utc.offsetFromTAI(date).add(OFFSET);
- }
- /** {@inheritDoc} */
- @Override
- public double offsetToTAI(final DateComponents date, final TimeComponents time) {
- final DateTimeComponents utcComponents =
- new DateTimeComponents(new DateTimeComponents(date, time), -OFFSET);
- return utc.offsetToTAI(utcComponents.getDate(), utcComponents.getTime()) - OFFSET;
- }
- /** {@inheritDoc} */
- @Override
- public boolean insideLeap(final AbsoluteDate date) {
- return utc.insideLeap(date);
- }
- /** {@inheritDoc} */
- @Override
- public <T extends CalculusFieldElement<T>> boolean insideLeap(final FieldAbsoluteDate<T> date) {
- return utc.insideLeap(date);
- }
- /** {@inheritDoc} */
- @Override
- public int minuteDuration(final AbsoluteDate date) {
- return utc.minuteDuration(date);
- }
- /** {@inheritDoc} */
- @Override
- public <T extends CalculusFieldElement<T>> int minuteDuration(final FieldAbsoluteDate<T> date) {
- return utc.minuteDuration(date);
- }
- /** {@inheritDoc} */
- @Override
- public double getLeap(final AbsoluteDate date) {
- return utc.getLeap(date);
- }
- /** {@inheritDoc} */
- @Override
- public <T extends CalculusFieldElement<T>> T getLeap(final FieldAbsoluteDate<T> date) {
- return utc.getLeap(date);
- }
- /** {@inheritDoc} */
- public String getName() {
- return "GLONASS";
- }
- /** {@inheritDoc} */
- public String toString() {
- return getName();
- }
- }