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Identification and Suppression of Nonmeteorological Echoes Using Spectral Polarimetric Processing

机译:光谱极化处理识别和抑制非气象回声

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摘要

The presence of nonmeteorological radar signals, such as sea clutter, birds, and chaff, is a continuous challenge for meteorological services in different regions. In this paper, we assign membership functions to these signals using spectral decompositions of copolar correlation coefficient, differential reflectivity, and differential phase. Additionally, we apply the dual-polarization spectral decomposition technique to identify and suppress nonmeteorological echoes present in radar observations. The performance of the polarimetric spectral filter is illustrated in observations from the C-band Helsinki University Kumpula radar. The results show that the spectral polarimetric filter may be a suitable solution for the mitigation of these nonmeteorological signals.
机译:诸如海杂波,鸟类和谷壳之类的非气象雷达信号的存在,一直是不同地区气象服务的持续挑战。在本文中,我们使用同相相关系数,差分反射率和差分相位的频谱分解为这些信号分配隶属函数。此外,我们应用双极化频谱分解技术来识别和抑制雷达观测中存在的非气象回波。 C赫尔辛基大学Kumpula雷达的观测结果说明了偏振光谱滤波器的性能。结果表明,光谱偏振滤波器可能是减轻这些非气象信号的合适解决方案。

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