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The Ka-Band Scanning ARM Cloud Radar (KASACR) records cloud properties. ARM's scanning cloud radars are 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 (1.7 kW peak power) or an X-band (20 kW peak power). Beamwidths for Ka-bands paired with W-bands are roughly matched at 0.3 degrees. The X-band beamwidth is approximately 1 degree. Due to the narrow antenna beamwidth, ARM’s scanning cloud radars use scanning strategies unlike typical weather radars. Rather than focusing on plan position indicator, or PPI, scans, the KASACR uses range height indicator, or RHI, scans at numerous azimuths to obtain cloud volume data. Measurements collected with the KASACR are copolar and cross-polar radar reflectivity, Doppler velocity, spectra width and spectra when not scanning, and linear depolarization ratio. KASACR data from the 2018–2019 Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign in Argentina are now available as b1-level products. Building on the original CACTI operational data, the b1-level products feature improved data quality resulting from extensive analyses and corrections. The data are cross-calibrated to a common point, datastreams are corrected for operational issues that occurred during the campaign, and several data quality masks and basic derived products are incorporated. For more information, read the CACTI radar b1-level processing report.

Ka波段扫描ARM云雷达（KASACR）用于记录云的特性。ARM的扫描云雷达是双频、双极化多普勒雷达，安装在共用的扫描基座上。每个基座包含一台Ka波段雷达（峰值功率2千瓦），而部署位置决定了第二台雷达是W波段（峰值功率1.7千瓦）还是X波段（峰值功率20千瓦）。与W波段配对的Ka波段波束宽度大致匹配，为0.3度；X波段的波束宽度约为1度。由于天线波束宽度较窄，ARM扫描云雷达采用的扫描策略与典型气象雷达不同。KASACR不采用平面位置指示器（PPI）扫描，而是通过在多个方位角上进行距离高度指示器（RHI）扫描来获取云体积数据。KASACR采集的测量数据包括同极化和交叉极化雷达反射率、多普勒速度、非扫描状态下的谱宽与频谱，以及线性退极化比。2018-2019年在阿根廷开展的云、气溶胶与复杂地形相互作用（CACTI）野外试验中获取的KASACR数据现已作为b1级产品发布。基于原始CACTI业务数据，b1级产品通过广泛分析与校正，数据质量得到提升。这些数据经过交叉校准至统一基准，数据流针对试验期间出现的业务问题进行了修正，并纳入了多个数据质量掩码和基础衍生产品。如需更多信息，请参阅CACTI雷达b1级处理报告。