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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Calibration of passive microwave polarimeters that use hybrid coupler-based correlators
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Calibration of passive microwave polarimeters that use hybrid coupler-based correlators

机译：使用基于混合耦合器的相关器对无源微波偏振仪进行校准

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摘要

Four calibration algorithms are studied for microwave polarimeters that use hybrid coupler-based correlators: (1) conventional two-look of hot and cold sources; (2) three looks of hot and cold source combinations; (3) two-look with correlated source; and (4) four-look combining methods (2) and (3). The systematic errors are found to depend on the polarimeter component parameters and accuracy of calibration noise temperatures. A case study radiometer in four different remote sensing scenarios was considered in light of these results. Applications for ocean surface salinity, ocean surface winds, and soil moisture were found to be sensitive to different systematic errors. Finally, a standard uncertainty analysis was performed on the four-look calibration algorithm, which was found to be most sensitive to the correlated calibration source.
机译：对于使用基于混合耦合器的相关器的微波偏振计，研究了四种校准算法：（1）传统的热源和冷源两种外观； （2）冷热源组合的三种外观； （3）具有相关来源的两眼； （4）四眼组合方法（2）和（3）。发现系统误差取决于旋光仪组件参数和校准噪声温度的准确性。根据这些结果，考虑了在四种不同遥感情况下的案例辐射计。发现海面盐度，海面风和土壤湿度的应用对不同的系统误差敏感。最后，对四视校准算法进行了标准不确定度分析，发现该算法对相关的校准源最为敏感。

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