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首页> 外文会议>International Workshop on Marine Remote Sensing in Northwest Pacific Region; 20041011-12; Beijing(CN) >Estimation of Chlorophyll-a Concentration with Satellite Remote Sensing
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Estimation of Chlorophyll-a Concentration with Satellite Remote Sensing

机译：卫星遥感估算叶绿素a浓度

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This study investigates the statistical model for estimating chlorophyll-a concentration from satellite data. Satellite detected radiance over ocean carries information on atmosphere as well as water quality, therefore, the model should include both of water quality parameters and atmospheric parameters. In this study we assume very simple multiple linear regression model to estimate chlorophyll-a concentration which describes remotely sensed radiance with chlorophyll-a concentration as a water quality parameter and atmospheric SPM as an atmospheric parameter; Ri = aiLog(chl-a) + bi SPM + ci --------(1) where Ri denotes remotely sensed radiance in band i, chl-a and SPM denotes chlorophyll-a concentration and SPM respectively. From eq.(1), the model to estimate chlorophyll-a concentration and to estimate SPM can be got as ; Log(chl-a) = a' * Ri + b' * Rj + c' --------(2) SPM = a" * Ri + b" * Rj + c" --------(3) Where Rj denotes remotely sensed radiance in band j. By applying this model to the different sensors and different areas, stability of the model is investigated. Satellite sensors include LANDSAT TM and ETM, and TERRA/MODIS. Ground observation experiments have been carried out at Tokyo Bay area and Mikawa Bay area in different seasons. The proposed multi regression model with chlorophyll-a and SPM gives shows good correlation with remotely sensed radiance, and indicates the possibility of chlorophyll-a estimation from satellite data.
机译：本研究调查了根据卫星数据估算叶绿素a浓度的统计模型。卫星检测到的海洋上的辐射携带着有关大气以及水质的信息，因此，该模型应同时包括水质参数和大气参数。在这项研究中，我们假设一个非常简单的多元线性回归模型来估计叶绿素a的浓度，该模型描述了以叶绿素a浓度作为水质参数和大气SPM作为大气参数的遥感辐射。 Ri = aiLog（chl-a）+ bi SPM + ci --------（1）其中，Ri表示i波段的遥感辐射，hl-a和SPM分别表示叶绿素a浓度和SPM。由式（1）可得估算叶绿素a浓度和估算SPM的模型为： Log（chl-a）= a'* Ri + b'* Rj + c'--------（2）SPM = a“ * Ri + b” * Rj + c“ ------ -（3）其中Rj表示j波段的遥感辐射，通过将该模型应用于不同的传感器和不同的区域，研究了模型的稳定性，卫星传感器包括LANDSAT TM和ETM，以及TERRA / MODIS。分别在东京湾和三川湾地区进行了不同季节的观测，所提出的叶绿素-a和SPM的多元回归模型与遥感辐射度显示出良好的相关性，并表明了根据卫星数据估算叶绿素-a的可能性。

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