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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >A Practical Method for On-Orbit Estimation of Polarization Response of Satellite Ocean Color Sensor
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A Practical Method for On-Orbit Estimation of Polarization Response of Satellite Ocean Color Sensor

机译：卫星海洋色彩传感器极化响应在轨估计的实用方法

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摘要

Polarization response is an important factor influencing the accuracy of radiance measurement for satellite ocean color sensors, which would change with on-orbit time. In this paper, a practical method is proposed for on-orbit estimation of polarization response. First, the linear polarization components of the Stokes vector entering the sensor are estimated by a vector radiative transfer model of the coupled ocean–atmosphere system. Second, the real radiance entering the sensor is estimated by another high-accuracy ocean color sensor using the cross-calibration method. Finally, based on the estimated linear polarization components and real radiance, the polarization response coefficients are derived by the least squares method. The proposed method is tested by applying it to the Moderate Resolution Imaging Spectroradiometer on board the Aqua satellite, and the derived polarization factors are consistent with the prelaunch values, indicating the reliability of the proposed method. In addition, our results reveal that the contribution of aerosol scattering should be included in the estimation of the linear polarization components of the Stokes vector at the top of atmosphere, particularly for long wavelengths.
机译：极化响应是影响卫星海洋颜色传感器辐射测量精度的重要因素，它会随着在轨时间而变化。本文提出了一种实用的极化响应在轨估计方法。首先，通过耦合的海洋-大气系统的矢量辐射传输模型估算进入传感器的斯托克斯矢量的线性极化分量。其次，另一个高精度海洋颜色传感器使用交叉校准方法估算进入传感器的实际辐射率。最后，基于估计的线性极化分量和实际辐射率，通过最小二乘法得出极化响应系数。通过将该方法应用于Aqua卫星上的中等分辨率成像光谱仪进行测试，得出的偏振因子与发射前的值一致，表明了该方法的可靠性。此外，我们的结果表明，气溶胶散射的贡献应包括在大气顶部的斯托克斯矢量的线性偏振分量的估计中，特别是对于长波长。

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