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| 題 名 | 衛載光達於測高應用之技術發展=The Development of Spaceborne Laser Altimetry |
|---|---|
| 作 者 | 曾國欣; | 書刊名 | 前瞻科技與管理 |
| 卷 期 | 14:1 2025.11[民114.11] |
| 頁 次 | 頁35-49 |
| 分類號 | 440.984 |
| 關鍵詞 | 主動式遙測; 衛星測高; 衛星水深測量; 數值高程模型; 環境變遷; Active remote sensing; Satellite altimetry; Satellite derived bathymetry; Digital elevation model; Environmental change; |
| 語 文 | 中文(Chinese) |
| DOI | 10.6193/JATM.202511_14(1).0003 |
| 中文摘要 | 運用衛星量測地表高度,除了傳統的微波、合成孔徑雷達或光學鏡頭多視取像等成熟技 術,近年亦有多個以光達為主的任務進行對地觀測,利用其光子脈衝來回傳遞的延時計算, 進一步推求衛星與目標物的距離。相較於傳統光學衛星需要拍攝多視立體像對交會出目標物 的高程,或是合成孔徑雷達利用相位干涉與解纏技術量測地表相對距離,光達衛星能更直接 計算距離並解析不同反射面之分層細節。雖然光達與其他光學儀器皆有雲遮或氣膠干擾的限 制,但其主動式遙測特性不受限於日照角度與拍攝時間,因此在應用上更為彈性,在製作數 值高程模型、環境變遷偵測,以及林地生物量與碳量估算等延伸應用,具有極高的發展潛 力。 |
| 英文摘要 | In addition to traditional altimetry technologies such as microwave sensing, Synthetic Aperture Radar (SAR), and stereopairs of optical sensors, recent years have witnessed the emergence of several Earth observation missions that utilize Light Detection and Ranging (LiDAR) as the primary sensing tool. By calculating the time delay of photon pulses emitted and received by the sensor, these missions are able to accurately determine the distance between the satellite and target objects on the Earth’s surface. Compared to conventional optical satellites that require multi-view stereo imagery to derive surface elevation, or SAR systems that rely on phase interferometry and phase unwrapping to measure relative displacement of surface scatterers, LiDAR satellites offer a more direct and intuitive method for calculating object distance. Furthermore, they are capable of resolving layered details of various reflecting surfaces. Although both LiDAR and other optical instruments are susceptible to interference from cloud cover and aerosols, the active nature of LiDAR remote sensing allows it to operate independently of solar illumination angles and acquisition time, thereby offering greater flexibility in application. LiDAR has demonstrated signifi cant potential in a wide range of applications, including the generation of digital elevation models, environmental change detection, and estimation of forest biomass and carbon stocks. |
本系統中英文摘要資訊取自各篇刊載內容。