GPSScale.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.time;
- import org.hipparchus.CalculusFieldElement;
- /** GPS time scale.
- * <p>By convention, TGPS = TAI - 19 s.</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 GPSScale implements TimeScale {
- /** Serializable UID. */
- private static final long serialVersionUID = 20131209L;
- /** Offset from TAI. */
- private static final double OFFSET = -19;
- /** Package private constructor for the factory.
- */
- GPSScale() {
- }
- /** {@inheritDoc} */
- @Override
- public double offsetFromTAI(final AbsoluteDate date) {
- return OFFSET;
- }
- /** {@inheritDoc} */
- @Override
- public <T extends CalculusFieldElement<T>> T offsetFromTAI(final FieldAbsoluteDate<T> date) {
- return date.getField().getZero().add(OFFSET);
- }
- /** {@inheritDoc} */
- @Override
- public double offsetToTAI(final DateComponents date, final TimeComponents time) {
- return -OFFSET;
- }
- /** {@inheritDoc} */
- public String getName() {
- return "GPS";
- }
- /** {@inheritDoc} */
- public String toString() {
- return getName();
- }
- }