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From Meters to Kilometers

机译：从米到公里

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There are probably many methods of determining the optimal spatial sampling frequency in the coastal zone. However, when a statistical approach is used, care must be taken to use a method that is applicable to the sample, and to ensure the rigorous assumptions of stationary functions are not violated. Otherwise, unclear results are obtained that may lead to an inefficient scientific design of a remote sensing sensor or experiment, for example, for the data discussed here, the assumptions inherent to using the autocorrelation function were violated, indicating that autocorrelation analysis is the wrong tool for this coastal data set. The results described here suggest that the spatial resolution required for offshore studies may be dependent on the spectral resolution of the data stream. At LEO-15 between 1 and 10 km, a 50- to 200-m GSD appears sufficient for single-band, dual-band, and hyperspectral-band data. Within 1 km of the shore, an even higher resolution sensor might be needed to resolve the wind and tid-ally impacted features. In the optically deep offshore waters of LEO-15, bottom effects do not impact R_(rs). However, in optically shallow areas, the spatial heterogeneity of the bottom may further reduce the GSD required to resolve the optical constituents near the coast (see Philpot et al., this issue). Offshore of 10 km, there is a significant difference in the ability to discriminate optical boundaries using the single or dual band data compared to the hyperspectral data. This suggests that hyperspectral data may be better able to delineate optically distinct regions in offshore coastal waters and that scaling studies may be dependent on the total number of spectral channels used in the analysis.
机译：确定沿海地区最佳空间采样频率的方法可能很多。但是，当使用统计方法时，必须注意使用适用于样本的方法，并确保不违反平稳函数的严格假设。否则，将获得不清楚的结果，可能导致遥感传感器或实验的科学设计效率低下，例如，对于此处讨论的数据，违反了使用自相关函数的固有假设，表明自相关分析是错误的工具该沿海数据集。这里描述的结果表明，海上研究所需的空间分辨率可能取决于数据流的光谱分辨率。在LEO-15的1到10 km之间，一个50到200 m的GSD似乎足以应付单波段，双波段和高光谱波段的数据。在海岸1公里以内，可能需要使用分辨率更高的传感器来解决风和潮汐影响的特征。在LEO-15的光学深海中，底部影响不会影响R_（rs）。但是，在光学较浅的区域，底部的空间异质性可能会进一步降低解析海岸附近的光学成分所需的GSD（请参见Philpot等，本期）。在离岸10公里处，与高光谱数据相比，使用单波段或双波段数据区分光学边界的能力存在显着差异。这表明，高光谱数据可能能够更好地描绘出近海沿海水域中光学上不同的区域，并且定标研究可能取决于分析中使用的光谱通道总数。

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