https://scholars.lib.ntu.edu.tw/handle/123456789/636980
標題: | High-Resolution L-Band TomoSAR Imaging on Forest Canopies with UAV Swarm to Detect Dielectric Constant Anomaly | 作者: | Chuang, Hsu Yueh JEAN-FU KIANG |
關鍵字: | dielectric constant | focusing function | forest model | high resolution | L-band | reflectivity function | TomoSAR | unmanned aerial vehicle | wildfire prediction | 公開日期: | 1-十月-2023 | 卷: | 23 | 期: | 19 | 來源出版物: | Sensors | 摘要: | A rigorous TomoSAR imaging procedure is proposed to acquire high-resolution L-band images of a forest in a local area of interest. A focusing function is derived to relate the backscattered signals to the reflectivity function of the forest canopies without resorting to calibration. A forest voxel model is compiled to simulate different tree species, with the dielectric constant modeled with the Maxwell-Garnett mixing formula. Five different inverse methods are applied on two forest scenarios under three signal-to-noise ratios in the simulations to validate the efficacy of the proposed procedure. The dielectric-constant profile of trees can be used to monitor the moisture content of the forest. The use of a swarm of unmanned aerial vehicles (UAVs) is feasible to carry out TomoSAR imaging over a specific area to pinpoint potential spots of wildfire hazards. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/636980 | ISSN: | 14248220 | DOI: | 10.3390/s23198335 |
顯示於: | 電機工程學系 |
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