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为了比较SeaWiFS计划中使用的K09光谱优化算法和S03通用算法在不同海域的反演情况,利用不同海域(尤其是东亚海域)现场观测的遥感反射率、叶绿素浓度等数据进行对比印证研究。结果显示,在悬浮泥沙和黄色物质影响大的水域,K09算法反演结果较S03好,平均相对偏差为26%~48.5%,随波长减小而增加;在较清澈水域,S03算法在较短波段(490~412nm:25.9%~45.1%)总体反演结果好于K09算法,但K09算法在长波段反演结果较好(510nm:29.2%,555nm:26%)。进一步分析发现,可见光波段遥感反射率反演结果偏低主要与悬浮泥沙含量和吸收性气溶胶的存在有关,反演结果偏高则主要与黄色物质含量有关。最后,叶绿素a反演结果显示S03算法总体较K09算法要好,显示了叶绿素波段比算法的鲁棒性。
In order to compare the K09 spectral optimization algorithm used in the SeaWiFS program with the S03 general algorithm in different sea areas, comparative studies were carried out using the data of remote sensing reflectance and chlorophyll concentration observed in different sea areas (especially in the East China Sea). The results show that the inversion results of K09 algorithm are better than S03 and the average relative deviations are 26% -48.5%, which increase with the decrease of wavelength. In more clear waters, S03 algorithm is better than S03 The overall inversion results of the short wavelength band (490-412 nm: 25.9% -45.1%) are better than those of the K09 algorithm, but the K09 algorithm performs well in the long wavelength band (510 nm: 29.2%, 555 nm: 26%). Further analysis showed that the low reflectance of remote sensing reflectance in the visible band was mainly related to the suspended sediment content and the presence of absorbing aerosols. The high inversion results were mainly related to the content of yellow matter. Finally, the results of chlorophyll a inversion show that the overall S03 algorithm is better than the K09 algorithm, which shows the robustness of the chlorophyll band algorithm.