 | Rossi C. Uncertainty assessment of single-pass TanDEM-X DEMs in selected applications: Diss. … Dr.-Ing. / Deutsches Zentrum für Luft- und Raumfahrt, Institut für Methodik der Fernerkundung, Oberpfaffenhofen. - Köln: DLR, 2016. - xvii, 180,[12] p.: ill., tab. - (Forschungsbericht; 2016-19). - Res. also Germ. - Bibliogr.: p.117-126. - ISSN 1434-8454
Шифр: (Pr 1120/2016-19) 02
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Abstract ...................................................... iii
Acknowledgements ............................................... ix
Outline of the Thesis .......................................... xv
I. Introduction and Theory .................................... 1
1 Introduction ............................................... 3
1.1 Scientific motivation ...................................... 4
1.2 Problem statement and thesis structure ..................... 5
2 Accuracy evaluation of InSAR DEMs — fundamentals and
state-of-the-art ........................................... 9
2.1 Digital Elevation Models fundamentals ...................... 9
2.1.1 Definition .......................................... 9
2.1.2 InSAR processing ................................... 10
2.1.3 Sampling and resolution ............................ 18
2.2 InSAR DEM error sources ................................... 24
2.2.1 Material property .................................. 24
2.2.2 Geometrical distortions ............................ 26
2.2.3 Processing: phase unwrapping ....................... 28
2.2.4 Processing: phase offset ........................... 29
2.2.5 Processing: atmosphere ............................. 30
2.2.6 Processing: synchronization ........................ 31
2.2.7 Baseline error ..................................... 31
2.2.8 Coherence decomposition ............................ 32
2.3 DEM uncertainty investigation ............................. 36
2.3.1 Difference with reference ......................... 36
2.3.2 Phase unwrapping control map ....................... 39
2.3.3 Slope and aspect 2-D PDF plot ...................... 44
2.3.4 Geometrical distortions map ....................... 46
2.3.5 Temporal analysis ................................. 47
2.4 Discussion and conclusions ................................ 48
II. Investigations ............................................. 51
3 TanDEM-X uncertainty investigation over smooth terrains:
the Lake Gala case study .................................. 53
3.1 Inspection placement in the thesis framework and
relevance ................................................. 53
3.2 Dataset description ....................................... 54
3.2.1 Rice growth cycle .................................. 54
3.2.2 TanDEM-X dataset ................................... 54
3.2.3 Reference dataset .................................. 57
3.3 Uncertainty assessment strategy and results ............... 58
3.3.1 Field segmentation ................................. 58
3.3.2 Temporal analysis ................................. 60
3.4 Polarization impact ....................................... 65
3.5 Discussion and conclusions ................................ 68
4 TanDEM-X uncertainty investigations over moderate
terrains: the Bardarbunga and Serra de Collcardus case
studies ................................................... 71
4.1 Inspection placement in the thesis framework and
relevance ................................................. 71
4.2 The Bardarbunga test case ................................. 72
4.2.1 Snow impact in DEM uncertainty ..................... 73
4.2.2 Dataset description ................................ 76
4.2.3 Uncertainty assessment and results ................. 76
4.3 The Serra de Collcardus test case ......................... 86
4.3.1 Dataset description ................................ 86
4.3.2 Uncertainty assessment strategy and results ........ 86
4.4 Discussion and conclusions ................................ 93
5 Uncertainty investigation over complex terrains:
the Berlin case study ..................................... 95
5.1 Inspection placement in the thesis framework and
relevance ................................................. 95
5.2 High-resolution urban DEM generation ...................... 96
5.2.1 Processing issues .................................. 96
5.2.2 Building shape in the DEM .......................... 97
5.3 Dataset description ...................................... 100
5.4 Uncertainty assessment strategy and results .............. 103
5.4.1 Difference with reference ........................ 104
5.4.2 Layover map generation ............................ 106
5.4.3 Layover analysis .................................. 108
5.5 Discussion and conclusions ............................... 112
6 Summary .................................................. 115
Appendix ...................................................... 129
A Relevant publication as part of the thesis ............... 129
A.l. TanDEM-X calibrated raw DEM generation ................... 129
A.2. Paddy-rice monitoring using TanDEM-X .................... 139
A.3. Polarization Impact in TanDEM-X Data Over Vertical-
Oriented Vegetation: The Paddy-Rice Case Study ........... 151
A.4. Quality assessment of TanDEM-X raw DEMs oriented to
a fusion with CartoSAT-1 DEMs ............................ 157
A.5. Urban DEM generation, analysis and enhancements using
TanDEM-X ................................................. 167
A.6. High-resolution InSAR building layovers detection and
exploitation ............................................. 180
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