wsacrcrcal (a1)

ARM's scanning cloud radars are fully coherent dual-frequency, dual-polarization Doppler radars mounted on a common scanning pedestal. Each pedestal includes a Ka-band radar (2kW peak power) and the deployment location determines whether the second radar is a W-band (WSACR; 1.7 kW peak power) or X-band (XSACR; 20 kW peak power). Beamwidths at Ka and W bands are roughly matched at 0.3 degrees. Due to the narrow antenna beamwidth, ARM’s scanning cloud radars use scanning strategies that are unlike typical weather radars. Rather than focusing on plan position indicator, or PPI, scans, the Ka-SACR uses range height indicator, or RHI, scans at numerous azimuths to obtain cloud volume data. Measurements collected with the W-SACR are copolar and cross-polar radar reflectivity, Doppler velocity, spectra width and spectra when not scanning, and linear depolarization ration.ARM的扫描云雷达为全相干双频双偏振多普勒雷达，搭载于共用扫描基座之上。每座基座均配备一部Ka波段雷达（峰值功率2kW），而部署位置将决定第二部雷达为W波段（WSACR；峰值功率1.7kW）或是X波段（XSACR；峰值功率20kW）。Ka波段与W波段的波束宽度均约为0.3度，二者大致匹配。鉴于天线波束宽度极窄，ARM扫描云雷达采用的扫描策略与常规天气雷达截然不同。Ka波段扫描云雷达（Ka-SACR）并未侧重平面位置显示器（plan position indicator, PPI）扫描，而是通过在多个方位角上实施距离高度显示器（range height indicator, RHI）扫描，以获取云体三维数据。W波段扫描云雷达（W-SACR）采集的测量数据包括同偏振与交叉偏振雷达反射率、多普勒速度、谱宽，以及非扫描时段的频谱与线性退极化比（linear depolarization ratio）。

搜集汇总

背景与挑战

背景概述

该数据集来自ARM扫描云雷达（W-SACR/Ka-SACR），是一种双频、双极化多普勒雷达，采用RHI扫描策略，波束宽度约0.3度。它测量共极化和交叉极化雷达反射率、多普勒速度、谱宽以及线性退极化比等参数，适用于云微观物理和动力过程研究。