wsacrcrcal (b1)

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。每座基座均配备一台Ka波段雷达（峰值功率2kW），根据部署位置的不同，第二台雷达可为W波段雷达（WSACR；峰值功率1.7kW）或X波段雷达（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。由于天线波束极窄，ARM扫描云雷达采用的扫描策略与常规天气雷达存在显著差异。相较于侧重平面位置显示器（plan position indicator, PPI）扫描，Ka波段扫描云雷达（Ka-SACR）会在多个方位角下采用距离高度显示器（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）所采集的测量参数包括同偏振与交叉偏振雷达反射率、多普勒速度、非扫描时段的谱宽与频谱，以及线性退偏振比。

搜集汇总

背景与挑战

背景概述

该数据集是W波段扫描ARM云雷达（W-SACR）的角反射器校准数据，数据级别为b1（基础质量控制原始数据）。数据采集于美国马萨诸塞州科德角的移动设施，作为'双柱气溶胶项目（TCAP）'的一部分，主要用于云观测相关的校准目的。