Spacecraft Recovery & Remote Sensing, Volume. 45, Issue 5, 123(2024)
Research on Area Correction for Monitoring Cyanobacterial Bloom with Medium and Low Resolution Satellites: Taking GOCI-2 as an Example
Figures & Tables(12)
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Table 1. The time and wind speed of Sentinel-2 and GOCI-2 image
View tableView in ArticleTable 1. The time and wind speed of Sentinel-2 and GOCI-2 image
日期 Sentinel-2过境时刻 GOCI-2过境时刻 时间差/min 风速/(m/s) 用途 2021-12-04 10:41 10:15 26 1.80 建模样本数据源 2022-03-04 10:36 10:15 21 0.56 建模样本数据源 2022-05-03 10:35 10:15 20 2.90 建模样本数据源 2022-07-07 10:35 10:15 20 3.64 验证数据 2022-09-10 10:35 10:15 20 2.53 验证数据 2022-10-15 10:36 10:15 21 2.91 建模样本数据源 2022-12-19 10:41 10:15 26 1.97 验证数据 2023-08-11 10:35 10:15 20 0.42 验证数据
Table 2. Precision of fitting NDVI to cyanobacterial bloom area ratio
View tableView in ArticleTable 2. Precision of fitting NDVI to cyanobacterial bloom area ratio
回归模型 表达式 模型参数 决定系数 均方根误差 注：x为GOCI-2像元NDVI值。 一次多项式 $ r = {k_0} + {k_1}x $ $ {k}_{0} $ $ {k}_{1} $ 0.668 74 0.115 二次多项式 $ r = {k_0} + {k_1}x + {k_2}x_{}^2 $ $ {k}_{0} $ $ {k}_{1} $ $ {k}_{2} $ 0.854 20 0.077 三次多项式 $ r = {k_0} + {k_1}x + {k_2}x_{}^2 + {k_3}x_{}^3 $ $ {k}_{0} $ $ {k}_{1} $ $ {k}_{2} $ $ {k}_{3} $ 0.886 79 0.068 四次多项式 $ r = {k_0} + {k_1}x + {k_2}x_{}^2 + {k_3}x_{}^3 + {k_4}x_{}^4 $ $ {k}_{0} $ $ {k}_{1} $ $ {k}_{2} $ $ {k}_{3} $ $ {k}_{4} $ 0.895 45 0.065 Logistic模型 $ r = \dfrac{{{k_1}}}{{{\text{1}} + {\text{e}}_{}^{ - {k_2}{\text{(}}x - {k_3}{\text{)}}}}} $ $ {k}_{1} $ $ {k}_{2} $ $ {k}_{3} $ 0.881 01 0.069
Table 3. Comparison and validation of GOCI-2 cyanobacterial bloom area extraction results based on Sentinel-2
View tableView in ArticleTable 3. Comparison and validation of GOCI-2 cyanobacterial bloom area extraction results based on Sentinel-2
日期 Sentinel-2水华面积/m2 GOCI-2水华面积/m2 GOCI-2提取精度/% 校正前 校正后 校正前 校正后 2022-07-07 557.37 688.87 621.70 76.4 88.5 2022-09-10 463.61 595.33 480.73 71.6 96.3 2022-12-19 149.21 210.77 168.02 58.7 87.4 2023-08-11 271.61 367.78 303.88 64.6 88.1
Table 4. NDVI band combination methods
View tableView in ArticleTable 4. NDVI band combination methods
波段组合方式 红光波段 近红外波段 注：本文2.2节采用的NDVI波段组合方式为NDVI_1。 NDVI_1 B8（660 nm） B12（865 nm） NDVI_2 B8（660 nm） B11（745 nm） NDVI_3 B7（620 nm） B11（745 nm） NDVI_4 B7（620 nm） B12（865 nm）
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Yaping WANG, Xifei XU, Jiaguo LI, Xingfeng CHEN, Ning ZHANG, Huajie CHEN, Limin ZHAO, Jun LIU. Research on Area Correction for Monitoring Cyanobacterial Bloom with Medium and Low Resolution Satellites: Taking GOCI-2 as an Example[J]. Spacecraft Recovery & Remote Sensing, 2024, 45(5): 123
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Received: Jan. 11, 2024
Accepted: --
Published Online: Nov. 13, 2024
The Author Email: LI Jiaguo (lijg@aircas.ac.cn)
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