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首页> 外文期刊>Estuarine Coastal and Shelf Science >Retrieval of nearshore bathymetry from Sentinel-2A and 2B satellites in South Florida coastal waters
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Retrieval of nearshore bathymetry from Sentinel-2A and 2B satellites in South Florida coastal waters

机译：南佛罗里达州沿海水域的Sentinel-2A和2B卫星的近岸沐浴浴检索

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This study examines the relatively high-resolution MultiSpectral Instrument (MSI) onboard Sentinel-2A and 2B for generating bathymetric maps through a ratio transform model in South Florida (United States). Atmospheric correction of imagery is implemented though ACOLITE software, providing accurate performance and consistency over different Sentinel-2A/B scenes and three different study sites. Vertical calibration uses 5-10 points collected from digital charts, independent of lidar surveys, which are used for validation and error analysis. Satellite-Derived Bathymetry (SDB) has Median Absolute Error (MedAE) of 0.5 m in West Palm Beach (at depths ranging between 0 and 18 m, limit of lidar survey for validation), 0.4 m in Key West (0-5 m), and 0.22 m in Dry Tortugas (0-6 m), in conditions with low turbidity. Accurate bathymetry mapping can be accomplished with both sensors over environments with varying water transparency conditions, with the advantage of a fast, flexible, and economical solution. The 10-m MSI can capture small-scale features, such as tidal channels, straits relevant to navigation or steep slopes. While the least error is achieved by calibrating each image separately, a generic calibration produces only a moderately greater error with MedAE still similar to 1m, indicating the robustness of the approach. The research highlights the great potential of the 5-day revisit, suggesting that the twin Sentinel-2 mission of the Copernicus programme may enhance SDB to leverage its use for several operational purposes, particularly in remote and inaccessible regions of the world.
机译：本研究检查了相对高分辨率的多光谱仪器（MSI）船上哨声-2a和2b，用于通过南佛罗里达州（美国）的比率变换模型产生碱基图。在Acolite软件中实现了图像的大气校正，在不同的Sentinel-2a / b场景和三个不同的研究站点上提供准确的性能和一致性。垂直校准使用从数字图表收集的5-10分，与LIDAR调查无关，用于验证和错误分析。卫星衍生的沐浴（SDB）在西棕榈滩的中位绝对误差（MEDAE）为0.5米（在0到18米之间的深度，LIDAR验证的限制），基韦斯特0.4米（0-5米）在浊度低的条件下，干燥玉米饼（0-6米）的0.22米。可以通过不同水透明度条件的环境通过两个传感器来完成精确的沐浴般映射，具有快速，灵活和经济的解决方案的优势。 10 M MSI可以捕获小规模的功能，例如与导航或陡坡相关的海峡频道。虽然通过单独校准每个图像来实现最小误差，但通用校准仅产生中等更大的误差，Medae仍然类似于1米，表示该方法的稳健性。该研究突出了5天重新审视的巨大潜力，这表明哥白尼计划的双手塞内尔 - 2个使命可以增强SDB，以利用其使用目的，特别是在世界的偏远和无法进入地区。

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