1 /* Copyright 2002-2024 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.modifiers;
18
19 import org.orekit.attitudes.FrameAlignedProvider;
20 import org.orekit.estimation.measurements.EstimatedMeasurement;
21 import org.orekit.estimation.measurements.EstimatedMeasurementBase;
22 import org.orekit.estimation.measurements.EstimationModifier;
23 import org.orekit.estimation.measurements.GroundStation;
24 import org.orekit.estimation.measurements.Range;
25 import org.orekit.models.earth.troposphere.TroposphericModel;
26 import org.orekit.propagation.SpacecraftState;
27
28 /** Class modifying theoretical range measurement with tropospheric delay.
29 * <p>
30 * The effect of tropospheric correction on the range is directly computed
31 * through the computation of the tropospheric delay.
32 * </p>
33 * <p>
34 * In general, for GNSS, VLBI, ... there is hardly any frequency dependence in the delay.
35 * For SLR techniques however, the frequency dependence is sensitive.
36 * </p>
37 *
38 * @author Maxime Journot
39 * @author Joris Olympio
40 * @since 8.0
41 */
42 public class RangeTroposphericDelayModifier extends BaseRangeTroposphericDelayModifier implements EstimationModifier<Range> {
43
44 /** Constructor.
45 *
46 * @param model Tropospheric delay model appropriate for the current range measurement method.
47 * @deprecated as of 12.1, replaced by {@link #RangeTroposphericDelayModifier(TroposphericModel)}
48 */
49 @Deprecated
50 public RangeTroposphericDelayModifier(final org.orekit.models.earth.troposphere.DiscreteTroposphericModel model) {
51 this(new org.orekit.models.earth.troposphere.TroposphericModelAdapter(model));
52 }
53
54 /** Constructor.
55 *
56 * @param model Tropospheric delay model appropriate for the current range measurement method.
57 * @since 12.1
58 */
59 public RangeTroposphericDelayModifier(final TroposphericModel model) {
60 super(model);
61 }
62
63 /** {@inheritDoc} */
64 @Override
65 public void modifyWithoutDerivatives(final EstimatedMeasurementBase<Range> estimated) {
66
67 final Range measurement = estimated.getObservedMeasurement();
68 final GroundStation station = measurement.getStation();
69
70 RangeModifierUtil.modifyWithoutDerivatives(estimated, station,
71 this::rangeErrorTroposphericModel,
72 this);
73
74
75 }
76
77 /** {@inheritDoc} */
78 @Override
79 public void modify(final EstimatedMeasurement<Range> estimated) {
80
81 final Range measurement = estimated.getObservedMeasurement();
82 final GroundStation station = measurement.getStation();
83 final SpacecraftState state = estimated.getStates()[0];
84
85 RangeModifierUtil.modify(estimated, getTropoModel(),
86 new ModifierGradientConverter(state, 6, new FrameAlignedProvider(state.getFrame())),
87 station,
88 this::rangeErrorTroposphericModel,
89 this::rangeErrorTroposphericModel,
90 this);
91
92
93 }
94
95 }