Development of ionosphere estimation techniques for the correction of SAR data: 14 Tabellen
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Köln
DLR
2013
|
| Ausgabe: | Als Ms. gedr. |
| Schriftenreihe: | Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt
2014,08 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zsfassung in engl. und dt. Sprache |
| Beschreibung: | XVII, 126 S. Ill., graph. Darst. |
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Datensatz im Suchindex
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|---|---|
| adam_text | CONTENTS
CONTENTS
DEVELOPMENT OF IONOSPHERE ESTIMATION TECHNIQUES FOR THE CORRECTION OF
SAR DATA I
ABSTRACT I
ZUSAMMENFASSUNG IV
ACKNOWLEDGEMENTS
V
CONTENTS VII
LIST OF TABLES
X
I
LIST OF FIGURES - - XIII
LIST OF SYMBOLS AND ACRONYMS XVII
ROMAN SYMBOLS XVII
ROMAN SYMBOL WITH ARIAL FONT FOR GEOMETRIC NOTATION XIX
GREEK SYMBOLS
X
X
PRE-DEFINED FUNCTIONS, OPERATORS AND DISTRIBUTIONS XX
FIELDS XXI
ACRONYMS
XX
1 INTRODUCTION 1
1.1 BACKGROUND AND MOTIVATION 1
1.2 STATE OF ART 2
1.3 OBJECTIVES 3
1.4 SYNOPSIS 4
2 SAR AND INSAR 5
2.1 IMAGING GEOMETRY 5
2.2 RANGE FOCUSING 6
2.2.1 CHIRP SIGNAL 6
2.2.2 CONVOLUTION & RESOLUTION 8
2.2.3 SAMPLING RATE 9
2.3 AZIMUTH FOCUSING 10
2.3.1 DOPPLER EFFECT 10
2.3.2 RESOLUTION AND PRF 10
2.3.3 MODES OF SAR ACQUISITION 11
2.4 SAR INTERFEROMETRY
2.4.1 GEOMETRY OF SAR INTERFEROMETRY 11
2.4.2 INSAR IN THE FREQUENCY DOMAIN 13
2.4.3 DECORRELATION 14
3 POLARIMETRY 17
3.1 TRANSVERSE WAVE 17
3.2 DESCRIPTION OF POLARIMETRY 18
3.2.1 WAVE POLARIMETRY 18
3.2.2 SCATTERING MATRIX 19
3.2.3 BASIS AND TRANSFORMATIONS 20
VII
HTTP://D-NB.INFO/1048624072
CONTENTS
3.2.4 SCATTERING VECTOR 21
3.2.5 COHERENCY/COVARIANCE MATRIX 22
3.3 POLARIMETRIC SAR INTERFEROMETRY 23
4 IONOSPHERE 25
4.1 OVERVIEW 25
4.2 VARIATION OF THE BACKGROUND IONOSPHERE 26
4.2.1 SPATIAL DISTRIBUTION 26
4.2.2 TEMPORAL PATTERN 28
4.3 SCINTILLATION 28
4.4 MAGNETIC FIELD 29
4.5 ORBIT 29
5 IONOSPHERIC EFFECTS ON SAR IMAGES 31
5.1 APPLETON-HARTREE EQUATION 31
5.1.1 EQUATION OF MOTION 31
5.1.2 INDEX OF REFRACTION 34
5.1.3 EIGENPOLARISATIONS 35
5.1.4 CHARACTERISTICS OF AN IONOSPHERIC WAVE 36
5.2 ATTENUATION 37
5.3 DISPERSION 38
5.3.1 PHASE AND GROUP VELOCITIES 38
5.3.2 PHASE ADVANCE 39
5.3.3 GROUP DELAY 39
5.3.4 RANGE DEFOCUSING 40
5.3.5 CROSS-TRACK TEC GRADIENT 40
5.4 BIREFRINGENCE 41
5.4.1 FARADAY ROTATION 41
5.4.2 POWER IMBALANCE 43
5.4.3 POL-INSAR 43
5.5 INHOMOGENEITY 44
5.5.1 AZIMUTH SHIFT 44
5.5.2 SCINTILLATION 45
5.5.3 RAY-BENDING 46
6 DATA-LEVEL CORRECTION APPROACHES 47
6.1 CORRECTION OF FARADAY ROTATION 47
6.1.1 MATHEMATICAL BACKGROUND 47
6.1.2 FARADAY ROTATION ESTIMATORS 48
6.1.3 PERFORMANCE METRICS AND ANALYSIS 49
6.1.4 FARADAY ROTATION ESTIMATION PERFORMANCE 51
6.1.5 CORRECTION RESULTS 56
6.1.6 CONCLUSIONS 58
6.2 CORRECTION OF INTERFEROMETRIC AZIMUTH SHIFT 59
6.2.1 BACKGROUND 59
6.2.2 DATASET 60
6.2.3 SHIFT ESTIMATION 61
6.2.4 RESULTS OF CORRECTION 63
6.2.5 DISCUSSION AND CONCLUSION 65
6.3 INTERFEROMETRIC PHASE CORRECTION USING DIFFERENTIAL FR 66
CONTENTS
6.3.1 FARADAY ROTATION AND INTERFEROMETRIC PHASE 66
6.3.2 NUMBER OF LOOKS 66
6.3.3 CORRECTION OF INTERFEROMETRIC PHASE 69
7 CORRECTION OF SCINTILLATION 73
7.1 SCINTILLATION CORRECTION 73
7.1.1 P-BAND AIRBORNE DATA 73
7.1.2 IONOSPHERIC PHASE SCREEN 74
7.1.3 IONOSPHERIC DISTURBANCES 76
7.2 CORRECTION METHODOLOGY 79
7.2.1 FARADAY ROTATION ESTIMATION 79
7.2.2 NOISE MODELLING 80
7.2.3 TEC AND SCINTILLATION PHASE ESTIMATION 83
7.2.4 COMPENSATION WITH PARTIAL DECOMPRESSION 83
7.2.5 CORRELATION MAP 84
7.2.6 EFFECT OF IONOSPHERIC ALTITUDE 84
7.3 RESULTS & PERFORMANCE ANALYSIS 85
7.3.1 IMPACT OF THE NUMBER OF LOOKS 87
7.3.2 IMPACT OF SNR 88
7.3.3 IMPACT OF THE GEOMAGNETIC LATITUDE 88
7.3.4 STANDARD DEVIATION OF CORRELATIONS 89
7.3.5 CONCLUSION 90
7.4 TEST WITH L-BAND DATA 90
7.5 DISCUSSION 91
7.5.1 ESTIMATION WINDOW 91
7.5.2 CORRECTION CRITERIA 93
8 COMBINED ESTIMATOR 95
8.1 MODEL 95
8.1.1 DIFFERENTIAL FARADAY ROTATION 96
8.1.2 AZIMUTH SHIFT 97
8.1.3 EQUATION FORMATION 97
8.2 DATA & MODEL COVARIANCE MATRICES 98
8.2.1 COVARIANCE OF THE DIFFERENTIAL FARADAY ROTATIONS 98
8.2.2 COVARIANCE OF THE AZIMUTH SHIFT ESTIMATES 100
8.2.3 MODEL COVARIANCE MATRIX 101
8.2.4 BUILDING THE2-D TEC MAP EQUATION 101
8.3 MODEL-LEVEL CORRECTION 102
8.4 RESULTS 103
8.4.1 COHERENCE IMPROVEMENT 104
8.4.2 RESIDUAL INTERFEROMETRIC PHASE 105
8.5 DISCUSSION 107
8.5.1 BALANCING DATA COVARIANCE MATRICES 107
8.5.2 EPSILON PARAMETER 109
8.5.3 IONOSPHERIC ALTITUDE 109
8.6 CONCLUSION HI
9 ALTITUDE ESTIMATION 113
9.1 SIMPLE PARALLAX 113
9.2 ADAPTIVE FOCUSING 114
CONTENTS
10 CONCLUSION 117
10.1 SUMMARY 117
10.2 CONTRIBUTIONS 118
10.3 FUTURE WORK 119
REFERENCE 121
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| spelling | Kim, Jun Su 1982- Verfasser (DE-588)1049266544 aut Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen Jun Su Kim Als Ms. gedr. Köln DLR 2013 XVII, 126 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt 2014,08 Zsfassung in engl. und dt. Sprache Zugl.: Zürich, Eidgenöss. Techn. Hochsch., Diss., 2013 Diss. ETH No. 21500 Radar (DE-588)4176765-2 gnd rswk-swf Synthetische Apertur (DE-588)4195782-9 gnd rswk-swf Polarimetrie (DE-588)4174982-0 gnd rswk-swf Interferometrie (DE-588)4027296-5 gnd rswk-swf Ionosphäre (DE-588)4130409-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Radar (DE-588)4176765-2 s Synthetische Apertur (DE-588)4195782-9 s Ionosphäre (DE-588)4130409-3 s Polarimetrie (DE-588)4174982-0 s Interferometrie (DE-588)4027296-5 s DE-604 Deutsches Zentrum für Luft- und Raumfahrt Forschungsbericht 2014,08 (DE-604)BV011758990 2014,08 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027225313&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Kim, Jun Su 1982- Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen Radar (DE-588)4176765-2 gnd Synthetische Apertur (DE-588)4195782-9 gnd Polarimetrie (DE-588)4174982-0 gnd Interferometrie (DE-588)4027296-5 gnd Ionosphäre (DE-588)4130409-3 gnd |
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| title | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen |
| title_auth | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen |
| title_exact_search | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen |
| title_full | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen Jun Su Kim |
| title_fullStr | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen Jun Su Kim |
| title_full_unstemmed | Development of ionosphere estimation techniques for the correction of SAR data 14 Tabellen Jun Su Kim |
| title_short | Development of ionosphere estimation techniques for the correction of SAR data |
| title_sort | development of ionosphere estimation techniques for the correction of sar data 14 tabellen |
| title_sub | 14 Tabellen |
| topic | Radar (DE-588)4176765-2 gnd Synthetische Apertur (DE-588)4195782-9 gnd Polarimetrie (DE-588)4174982-0 gnd Interferometrie (DE-588)4027296-5 gnd Ionosphäre (DE-588)4130409-3 gnd |
| topic_facet | Radar Synthetische Apertur Polarimetrie Interferometrie Ionosphäre Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027225313&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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