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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Polarimetric Bias Correction of Practical Planar Scanned Antennas for Meteorological Applications
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Polarimetric Bias Correction of Practical Planar Scanned Antennas for Meteorological Applications

机译：气象应用中实用平面扫描天线的极化偏置校正

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摘要

This paper proposes two bias correction methods for the practical planar polarimetric phased array weather radar, namely, the boresight correction and the array pattern-based correction. As an extension of the projection matrix method developed in previous research, the performance of the boresight correction considering the measurement errors of element patterns and the impacts of entire array patterns on polarimetric variables is theoretically evaluated. It is shown that the measurement errors of element patterns are crucial for the polarimetric bias correction. Furthermore, for a planar electronically scanned antenna, the measurement performance of the linear depolarization ratio varies in the beam direction, while the measurement performance of the differential reflectivity remains almost the same within the beam scan area. In order to compensate the impacts of entire array patterns on polarimetric variables, the array pattern-based correction method is formulated, and its performance is theoretically analyzed. Assessments of the analysis and future research are discussed.
机译：针对实际的平面极化相控阵天气雷达，提出了两种视差校正方法，即视轴校正和基于阵列方向图的校正。作为先前研究中开发的投影矩阵方法的扩展，从理论上评估了考虑到元件图样的测量误差以及整个阵列图样对极化变量的影响的视轴校正性能。结果表明，元件图案的测量误差对于偏振偏置校正至关重要。此外，对于平面电子扫描天线，线性去极化比的测量性能在波束方向上变化，而差分反射率的测量性能在波束扫描区域内保持几乎相同。为了补偿整个阵列图形对偏振变量的影响，提出了基于阵列图形的校正方法，并对其性能进行了理论分析。讨论了分析评估和未来研究。

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