PreCompensation.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.estimation.leastsquares;
- import org.orekit.estimation.measurements.EstimatedMeasurement;
- import org.orekit.estimation.measurements.ObservedMeasurement;
- import org.orekit.time.AbsoluteDate;
- import org.orekit.time.TimeStamped;
- /** Class holding compensation of time offset for measurements.
- * @author Luc Maisonobe
- * @since 8.1
- */
- class PreCompensation implements TimeStamped {
- /** Underlying measurement. */
- private final ObservedMeasurement<?> observed;
- /** State pick-up dates, including pre-compensation. */
- private final AbsoluteDate precompensated;
- /** Simple constructor.
- * @param observed underlying measurement
- * @param previousEstimation previous estimation of the measurement (may be null)
- */
- PreCompensation(final ObservedMeasurement<?> observed,
- final EstimatedMeasurement<?> previousEstimation) {
- this.observed = observed;
- if (previousEstimation == null) {
- // no previous estimate of transit time, we will pickup state at observed measurement date
- precompensated = observed.getDate();
- } else {
- // pre-compensate signal transit time
- precompensated = observed.getDate().shiftedBy(-previousEstimation.getTimeOffset());
- }
- }
- /** Get the observed measurement.
- * @return observed measurement
- */
- public ObservedMeasurement<?> getMeasurement() {
- return observed;
- }
- /** Get the state date, i.e. the measurement date pre-compensated
- * by time offset.
- * @return pre-compensated state date
- */
- public AbsoluteDate getDate() {
- return precompensated;
- }
- }