1 /* Copyright 2002-2025 CS GROUP
2 * Licensed to CS GROUP (CS) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * CS licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.orekit.estimation.measurements.generation;
18
19 import org.orekit.estimation.measurements.EstimatedMeasurementBase;
20 import org.orekit.estimation.measurements.ObservedMeasurement;
21 import org.orekit.time.AbsoluteDate;
22 import org.orekit.time.DatesSelector;
23
24 import java.util.function.Predicate;
25
26 /** {@link Scheduler} generating measurements sequences continuously.
27 * <p>
28 * Continuous schedulers continuously generate measurements following a repetitive pattern.
29 * The repetitive pattern can be either a continuous stream of measurements separated by
30 * a constant step (for example one measurement every 60s), or several sequences of measurements
31 * at high rate up to a maximum number, with a rest period between sequences (for example
32 * sequences of up to 256 measurements every 100ms with 300s between each sequence).
33 * </p>
34 * @param <T> the type of the measurement
35 * @author Luc Maisonobe
36 * @since 9.3
37 */
38 public class ContinuousScheduler<T extends ObservedMeasurement<T>> extends AbstractScheduler<T> {
39
40 /** Simple constructor.
41 * <p>
42 * BEWARE! Dates selectors often store internally the last selected dates, so they are not
43 * reusable across several {@link EventBasedScheduler instances}. A separate selector
44 * should be used for each scheduler.
45 * </p>
46 * <p>
47 * This constructor calls {@link #ContinuousScheduler(MeasurementBuilder, DatesSelector, Predicate)}
48 * whith the predicate set to accept all generated measurements.
49 * </p>
50 * @param builder builder for individual measurements
51 * @param selector selector for dates (beware that selectors are generally not
52 * reusable across several {@link EventBasedScheduler instances}, each selector should
53 * be dedicated to one scheduler
54 */
55 public ContinuousScheduler(final MeasurementBuilder<T> builder, final DatesSelector selector) {
56 super(builder, selector, e -> true);
57 }
58
59 /** Simple constructor.
60 * <p>
61 * BEWARE! Dates selectors often store internally the last selected dates, so they are not
62 * reusable across several {@link EventBasedScheduler instances}. A separate selector
63 * should be used for each scheduler.
64 * </p>
65 * @param builder builder for individual measurements
66 * @param selector selector for dates (beware that selectors are generally not
67 * reusable across several {@link EventBasedScheduler instances}, each selector should
68 * be dedicated to one scheduler
69 * @param filter predicate for a posteriori filtering of generated measurements
70 * (measurements are accepted if the predicates evaluates to {@code true})
71 * @since 13.0
72 */
73 public ContinuousScheduler(final MeasurementBuilder<T> builder, final DatesSelector selector,
74 final Predicate<EstimatedMeasurementBase<T>> filter) {
75 super(builder, selector, filter);
76 }
77
78 /** {@inheritDoc} */
79 @Override
80 public boolean measurementIsFeasible(final AbsoluteDate date) {
81 return true;
82 }
83
84
85 }