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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 江簡富 | zh_TW |
| dc.contributor.advisor | Jean-Fu Kiang | en |
| dc.contributor.author | 王通晟 | zh_TW |
| dc.contributor.author | Tung-Cheng Wang | en |
| dc.date.accessioned | 2025-07-09T16:08:56Z | - |
| dc.date.available | 2025-07-10 | - |
| dc.date.copyright | 2025-07-09 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2025-06-30 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/97630 | - |
| dc.description.abstract | 內波易對水下行動產生威脅，但由於其在水面上的足跡易被風浪掩埋，即時偵測很困難。本論文使用多衛星跨軌干涉合成孔徑雷達成像(multi-satellite cross-track interferometric synthetic aperture radar) 技術，獲取內波在水面上的足跡。多組衛星以不同方向、海拔飛行，將獲取的海面高度影像作平均，以消除周遭風浪的影響，但水平方向的解析度因此變差。本論文參照三起內波事件進行模擬，輔以適當參數與運作情境，可在風速每秒六公尺內達到水平方向解析度 14 公尺，海面高度誤差則在公分等級。 | zh_TW |
| dc.description.abstract | Internal waves, which can wreak havoc on underwater activities, are difficult to detect because their signatures on the sea surface are easily obscured by wind waves. In this work, a cross-track interferometric synthetic aperture radar (XTI-SAR) imaging technique based on multiple satellite-pairs is proposed to detect the surface signatures of internal wave, with higher height accuracy and finer horizontal resolution that can be achieved by using conventional satellite pair. By superposing the XTI-SAR images acquired from multiple satellite pairs, random features of wind waves are filtered out to reveal the surface signatures of internal wave, without compromising the horizontal resolution. Three internal-wave events are simulated to demonstrate the efficacy of the proposed approach, with height accuracy of centimeters and spatial resolution of 14 m, under wind speed of U₁₀ ≦ 6 m/s. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2025-07-09T16:08:56Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2025-07-09T16:08:56Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 論文口試審定書 i
Acknowledgment ii 中文摘要 iii Abstract iv Table of Contents v List of Figures viii List of Tables xiv 1 Introduction 1 2 Features of Internal Waves 8 2.1 Radar Cross Section 10 2.2 Wind-Wave Model 15 3 Implementation of XTI SAR Imaging 17 3.1 Co-registration 18 3.2 Removal of Flat-Earth Phase 20 3.3 Multi-Satellite Constellation and Pair Averaging 21 3.4 Phase Unwrapping and Mean Filter 23 3.5 Elevation Mapping and Geometric Correction 25 3.6 Internal-Wave Signature Detection Constraints 27 3.6.1 Blind-Spot in SAR Images 28 3.6.2 Baseline Decorrelation and Center Frequency Shift 28 3.6.3 Trade-off between Horizontal Resolution and Vertical Accuracy 30 4 Simulations and Discussion 32 4.1 Velocity Bunching Effect 37 4.2 Effect of Baseline 43 4.3 Effect of Mean Filter Size 44 4.4 Selection of Baseline, Mean-Filter Size and Satellite Pair Number 46 4.5 Effect of Wind Speed 49 4.6 Detection of Subtle Internal-Wave Signatures 52 5 Conclusions 57 Bibliography 59 Appendix: Registration Error Induced by Target Motion 71 | - |
| dc.language.iso | en | - |
| dc.subject | 多組衛星 | zh_TW |
| dc.subject | 水面足跡 | zh_TW |
| dc.subject | 內波 | zh_TW |
| dc.subject | 跨軌干涉合成孔徑雷達 | zh_TW |
| dc.subject | multiple satellite pairs | en |
| dc.subject | cross-track interferometric synthetic aperture radar (XTI-SAR) | en |
| dc.subject | internal wave | en |
| dc.subject | surface signature | en |
| dc.title | 採用多衛星跨軌干涉合成孔徑雷達偵測內波 | zh_TW |
| dc.title | Internal Wave Detection with Multi-Satellite Cross-Track InSAR Imaging | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 李翔傑;丁建均 | zh_TW |
| dc.contributor.oralexamcommittee | Hsiang-Chieh Lee;Jian-Jiun Ding | en |
| dc.subject.keyword | 跨軌干涉合成孔徑雷達,內波,水面足跡,多組衛星, | zh_TW |
| dc.subject.keyword | cross-track interferometric synthetic aperture radar (XTI-SAR),internal wave,surface signature,multiple satellite pairs, | en |
| dc.relation.page | 73 | - |
| dc.identifier.doi | 10.6342/NTU202501333 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2025-07-01 | - |
| dc.contributor.author-college | 電機資訊學院 | - |
| dc.contributor.author-dept | 電信工程學研究所 | - |
| dc.date.embargo-lift | 2025-07-10 | - |
| 顯示於系所單位： | 電信工程學研究所 | |
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