Unnormalizer.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.forces.gravity.potential;
- import org.orekit.forces.gravity.potential.NormalizedSphericalHarmonicsProvider.NormalizedSphericalHarmonics;
- import org.orekit.time.AbsoluteDate;
- /** Wrapper providing un-normalized coefficients from normalized ones.
- * @author Luc Maisonobe
- * @since 6.0
- */
- class Unnormalizer implements UnnormalizedSphericalHarmonicsProvider {
- /** Normalized provider to which everything is delegated. */
- private final NormalizedSphericalHarmonicsProvider normalized;
- /** Factors for un-normalization. */
- private final double[][] factors;
- /** Simple constructor.
- * @param normalized provider to un-normalize
- */
- Unnormalizer(final NormalizedSphericalHarmonicsProvider normalized) {
- this.normalized = normalized;
- this.factors = GravityFieldFactory.getUnnormalizationFactors(normalized.getMaxDegree(),
- normalized.getMaxOrder());
- }
- /** {@inheritDoc} */
- @Override
- public int getMaxDegree() {
- return normalized.getMaxDegree();
- }
- /** {@inheritDoc} */
- @Override
- public int getMaxOrder() {
- return normalized.getMaxOrder();
- }
- /** {@inheritDoc} */
- @Override
- public double getMu() {
- return normalized.getMu();
- }
- /** {@inheritDoc} */
- @Override
- public double getAe() {
- return normalized.getAe();
- }
- /** {@inheritDoc} */
- @Override
- public AbsoluteDate getReferenceDate() {
- return normalized.getReferenceDate();
- }
- /** {@inheritDoc} */
- @Override
- public TideSystem getTideSystem() {
- return normalized.getTideSystem();
- }
- /** {@inheritDoc} */
- @Override
- public UnnormalizedSphericalHarmonics onDate(final AbsoluteDate date) {
- final NormalizedSphericalHarmonics harmonics = normalized.onDate(date);
- return new UnnormalizedSphericalHarmonics() {
- /** {@inheritDoc} */
- @Override
- public AbsoluteDate getDate() {
- return date;
- }
- /** {@inheritDoc} */
- @Override
- public double getUnnormalizedCnm(final int n, final int m) {
- return harmonics.getNormalizedCnm(n, m) * factors[n][m];
- }
- /** {@inheritDoc} */
- @Override
- public double getUnnormalizedSnm(final int n, final int m) {
- return harmonics.getNormalizedSnm(n, m) * factors[n][m];
- }
- };
- }
- }