wsacrcrraster (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.大气辐射测量（ARM）的扫描云雷达为全相干双频双偏振多普勒雷达，搭载于统一扫描基座之上。每个扫描基座均配备一部Ka波段雷达（峰值功率2kW），部署位置将决定第二部雷达为W波段（WSACR；峰值功率1.7kW）或X波段（XSACR；峰值功率20kW）。Ka波段与W波段的波束宽度大致匹配，均约为0.3度。由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。其并未侧重平面位置显示器（Plan Position Indicator, PPI）扫描模式，而是令Ka波段扫描云雷达（Ka-SACR）在多个方位角下开展距离高度显示器（Range Height Indicator, RHI）扫描，以获取云体三维体积数据。W波段扫描云雷达（W-SACR）采集的测量参数包括同极化与交叉极化雷达反射率、多普勒速度、谱宽、非扫描时段的频谱，以及线性退极化比。

搜集汇总

背景与挑战

背景概述

该数据集涉及ARM的扫描云雷达系统，这是一个双频、双极化、多普勒雷达系统，包括Ka波段和W波段雷达，具有匹配的0.3度波束宽度。其扫描策略独特，主要使用RHI扫描而非典型PPI扫描，以获取云体积数据，并测量雷达反射率、多普勒速度等关键参数。