Quantitative Error Analysis on Polarimetric Phased Array Radar Weather Measurements to Reveal Radar Performance and Configuration Potential

IF 3.2 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmospheric Measurement Techniques Pub Date : 2024-08-02 DOI:10.5194/amt-2024-118

Junho Ho, Zhe Li, Guifu Zhang

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引用次数: 0

Abstract

Abstract. The initial weather measurements from two polarimetric phased array radars (PPAR) with cylindrical and planar configurations, both developed by the Advanced Radar Research Center (ARRC) at the University of Oklahoma (OU), were compared with those from the dish-antenna systems, the operational KTLX Weather Surveillance Radar-1988 Doppler (WSR-88D) located in Oklahoma City, Oklahoma (~23 km northeast of OU). Both the cylindrical PPAR (CPPAR) and the planar PPAR (PPPAR) in Horus are S-band two-dimensional (2D) electronic scan PPAR. This comparison investigates the error statistics of the polarimetric measurements in one-dimensional (1D) electronic scan from each radar during two convective rain events. The first event occurred on 30 August 2019, when the CPPAR performed a 3.3° elevation plan-position indicator (PPI) scan at 25 azimuth angles. The second event took place on 4 October 2023, when Horus conducted range-height indicator (RHI) scans at 64 elevations. For both events, KTLX provided volumetric polarimetric radar data and served as the reference. To ensure temporal and spatial alignment between the radars, reconstructed RHI scans and PPI sectors from KTLX were matched to the corresponding Horus rays and CPPAR domain, respectively. The standard deviations and mean biases of the PPAR weather measurements were calculated and analyzed. The standard deviations of the two PPARs were similar and met the Radar Functional Requirements set by the National Oceanic and Atmospheric Administration/National Weather Service. However, as noted in previous studies, the standard deviation, and biases of polarimetric variables from Horus exhibited varying error characteristics depending on the electronic steering angle from broadside. The present results suggest that PPPARs may have difficulties in producing high-quality polarimetric data at large steering angles and further investigation on both CPPAR and 2D PPPAR is required to find the optimal design for future weather applications.

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对极坐标相控阵雷达气象测量进行定量误差分析，以揭示雷达性能和配置潜力

摘要。由俄克拉荷马大学（OU）先进雷达研究中心（ARRC）开发的两台圆柱形和平面配置的偏振相控阵雷达（PPAR）与碟形天线系统（位于俄克拉荷马州俄克拉荷马城（OU 东北约 23 公里处）的 KTLX 气象监视雷达-1988 多普勒（WSR-88D））的初始气象测量结果进行了比较。Horus 的圆柱形 PPAR（CPPAR）和平面 PPAR（PPPAR）都是 S 波段二维（2D）电子扫描 PPAR。本次比较研究了在两次对流雨事件中，两部雷达以一维（1D）电子扫描方式进行的偏振测量误差统计。第一次事件发生在 2019 年 8 月 30 日，当时 CPPAR 在 25 个方位角执行了 3.3° 仰角平面位置指示器 (PPI) 扫描。第二次事件发生在 2023 年 10 月 4 日，当时 Horus 在 64 个仰角进行了测距高度指示器（RHI）扫描。在这两次活动中，KTLX 都提供了体积偏振雷达数据，并作为参照物。为确保雷达之间的时空一致性，KTLX 重建的 RHI 扫描和 PPI 扇区分别与相应的 Horus 射线和 CPPAR 域相匹配。对 PPAR 气象测量的标准偏差和平均偏差进行了计算和分析。两个 PPAR 的标准偏差相似，符合国家海洋和大气管理局/国家气象局规定的雷达功能要求。不过，正如以前的研究指出的那样，Horus 偏振变量的标准偏差和偏差表现出不同的误差特征，这取决于从宽边开始的电子转向角。目前的结果表明，PPPAR 在大转向角时可能难以生成高质量的偏振数据，因此需要对 CPPAR 和二维 PPPAR 进行进一步研究，以找到未来气象应用的最佳设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Atmospheric Measurement Techniques METEOROLOGY & ATMOSPHERIC SCIENCES-

CiteScore

7.10

自引率

18.40%

发文量

331

审稿时长

3 months

期刊介绍： Atmospheric Measurement Techniques (AMT) is an international scientific journal dedicated to the publication and discussion of advances in remote sensing, in-situ and laboratory measurement techniques for the constituents and properties of the Earth’s atmosphere. The main subject areas comprise the development, intercomparison and validation of measurement instruments and techniques of data processing and information retrieval for gases, aerosols, and clouds. The manuscript types considered for peer-reviewed publication are research articles, review articles, and commentaries.