Seite - 20 - in Ice Basement Mapping of Eisriesenwelt Cave with Ground Penetrating Radar

Inhaltsverzeichnis

1. Statement of Authorship 2
2. Acknowledgement 3
3. Content 1
4. Figures 3
5. Tables 5
6. INTRODUCTION 6
   1. Geographic Environment Of The Eisriesenwelt Cave 7
   2. Surveying Methods of Ground Penetrating Radar 9
      1. Introduction of Ground penetrating radar 9
      2. Surveying Methods 10
   3. Structure of the Thesis 11
   4. Research Aims and Objects 12
      1. Aims 12
      2. Objectives 12
7. STUDY AREA AND DATA PREPARATION 12
   1. Study Area 12
      1. The discovery and early explorations of the Eisriesenwelt cave 12
      2. The classification of ice caves 14
      3. Laser scanning and previous ice thickness measurements in ERW 16
      4. The digitalization of study area in ERW 17
   2. BASIC PRINCIPLES OF GPR DATA 20
      1. GPR systems 20
      2. GPR datasets 23
   3. GPR Data Pre-Processing 23
      1. Dewow Filtering 24
      2. Time-zero correction 25
      3. Gain functions 26
      4. Trace editing 30
   4. Time-Depth Conversion of GPR Data 30
      1. Propagation velocity analysis 31
      2. Data Migration 32
      3. Layer analysis 34
   5. Elevation Extraction From Laser Scanned Dataset 35
8. METHODOLOGY 35
   1. Electromagnetic Features of Subject and Radar Wave 37
   2. Accuracy Assessment 39
   3. Feature Points Extraction 42
   4. Methodology of Depth Interpolation 44
   5. Methodology of Map producing 45
9. RESULTS 47
10. CONCLUSION AND OUTLOOK 53
    1. Conclusion 54
    2. Outlook 55
11. References 56