Di Biase Valeria, Kuschnerus Mieke, Lindenbergh Roderik C
Department of Geoscience and Remote Sensing, Delft University of Technology, 2628 CN Delft, The Netherlands.
Sensors (Basel). 2022 Mar 16;22(6):2311. doi: 10.3390/s22062311.
In recent years, our knowledge of coastal environments has been enriched by remotely sensed data. In this research, we co-analyse two sensor systems: Terrestrial Laser Scanning (TLS) and satellite-based Synthetic Aperture Radar (SAR). To successfully extract information from a combination of different sensors systems, it should be understood how these interact with the common environment. TLS provides high-spatiotemporal-resolution information, but it has high economic costs and limited field of view. SAR systems, despite their lower resolution, provide complete, repeated, and frequent coverage. Moreover, Sentinel-1 SAR images are freely available. In the present work, Permanent terrestrial Laser Scanning (PLS) data, collected in Noordwijk (The Netherlands), are compared with simultaneous Sentinel-1 SAR images to investigate their combined use on coastal environments: knowing the relationship between SAR and PLS data, the SAR dataset could be correlated to beach characteristics. Meteorological and surface roughness have also been taken into consideration in the evaluation of the correlation between PLS and SAR data. A generally positive linear correlation factor up to 0.5 exists between PLS and SAR data. This correlation occurs for low- or moderate-wind-speed conditions, whilst no particular correlation has been highlighted for high wind intensity. Furthermore, a dependence of the linear correlation on the wind direction has been detected.
近年来，遥感数据丰富了我们对沿海环境的认识。在本研究中，我们共同分析了两种传感器系统：地面激光扫描（TLS）和星载合成孔径雷达（SAR）。为了成功地从不同传感器系统的组合中提取信息，应该了解它们如何与共同环境相互作用。TLS提供高时空分辨率信息，但经济成本高且视野有限。SAR系统尽管分辨率较低，但能提供完整、重复且频繁的覆盖范围。此外，哨兵-1 SAR图像是免费可得的。在本工作中，将在荷兰诺德韦克收集的永久地面激光扫描（PLS）数据与同期的哨兵-1 SAR图像进行比较，以研究它们在沿海环境中的联合应用：了解SAR和PLS数据之间的关系后，SAR数据集可与海滩特征相关联。在评估PLS和SAR数据之间的相关性时，还考虑了气象和表面粗糙度。PLS和SAR数据之间通常存在高达0.5的正线性相关因子。这种相关性出现在低风速或中风速条件下，而在高风强度下未发现特别的相关性。此外，还检测到线性相关性对风向的依赖性。
