LinearLineDatation.java
/* Copyright 2013-2019 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (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.rugged.linesensor;
import org.orekit.time.AbsoluteDate;
/** Linear model for {@link LineDatation line datation}.
* <p>
* Instances of this class are guaranteed to be immutable.
* </p>
* @author Luc Maisonobe
*/
public class LinearLineDatation implements LineDatation {
/** Reference date. */
private final AbsoluteDate referenceDate;
/** Line number at reference date. */
private final double referenceLine;
/** Rate of lines scanning (lines / seconds). */
private final double rate;
/** Simple constructor.
* @param referenceDate reference date
* @param referenceLine line number at reference date
* @param rate rate of lines scanning (lines / seconds)
*/
public LinearLineDatation(final AbsoluteDate referenceDate, final double referenceLine,
final double rate) {
this.referenceDate = referenceDate;
this.referenceLine = referenceLine;
this.rate = rate;
}
/** {@inheritDoc} */
@Override
public AbsoluteDate getDate(final double lineNumber) {
return referenceDate.shiftedBy((lineNumber - referenceLine) / rate);
}
/** {@inheritDoc} */
@Override
public double getLine(final AbsoluteDate date) {
return referenceLine + rate * date.durationFrom(referenceDate);
}
/** {@inheritDoc} */
@Override
public double getRate(final double lineNumber) {
return rate;
}
}