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Polarimetric observations by a phase-tilt weather radar in the DFW network

机译：DFW网络中的相位倾斜天气雷达的极化观测

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During the Spring of 2014 a Phase-Tilt Weather Radar (PTWR) developed by the University of Massachusetts was deployed within the Dallas-Fort Worth Urban Testbed operated by the CASA Engineering Research Center. During an eight-week period it observed several weather events including severe thunderstorms and stratiform rain. Observations by the phased-array radar were compared to a nearby mechanically-scanned dual-polarized radar employing a parabolic dish with the objective of assessing the relative severity of biases in polarimetric observations by the PTWR. Such biases are due to polarization-basis rotation due to scanning along a tilted axis. It is expected these would be negligible except possibly at large (> 10°) elevation angles. At lower elevation angles where near-direct comparisons were possible, differences in observations were not uniquely attributable to this souce of error.
机译：在2014年春季，由麻省大学开发的相倾斜气象雷达（PTWR）被部署在由CASA工程研究中心运营的达拉斯-沃思堡城市试验台中。在八周的时间内，它观测到了几起天气事件，包括严重的雷暴和层状降雨。相控阵雷达的观测结果与附近使用抛物线形天线的机械扫描双极化雷达进行了比较，目的是评估PTWR极化观测中偏倚的相对严重性。这样的偏差是由于沿倾斜轴进行扫描而导致的基于偏振的旋转。预计这些角度可以忽略不计，除非可能有较大的（> 10°）仰角。在可能进行直接比较的较低仰角下，观测值的差异并非唯一地归因于这种误差源。

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