Ka-Band ARM Zenith RADAR (KAZR); moderate sensitivity mode - kazrcfrmd

The Ka-band ARM Zenith Radar (KAZR) remotely probes the extent and composition of clouds at millimeter wavelengths. The KAZR is a zenith-pointing Doppler radar that operates at a frequency of approximately 35 GHz. The main purpose of this radar is to determine the first three Doppler moments (reflectivity, vertical velocity, and spectral width) at a range resolution of approximately 30 meters from near-ground to nearly 20 kilometers in altitude. \n \nThe KAZR replaces the millimeter-wavelength cloud radar (MMCR) and uses a new digital receiver that provides higher spatial and temporal resolution than the MMCR. In addition, spectral artifacts in the data are significantly reduced in the KAZR, allowing researchers to study cloud dynamics much more closely than with the MMCR. \n \nKAZR 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ARM天顶雷达（Ka-band ARM Zenith Radar，KAZR）以毫米波频段对云的分布范围与组成进行遥感探测。该设备为天顶指向型多普勒雷达，工作频率约为35 GHz。其核心功能为在约30米的距离分辨率下，获取从近地面至近20千米高度范围内的前三个多普勒矩量（反射率、垂直速度与谱宽）。 KAZR替代了毫米波云雷达（millimeter-wavelength cloud radar，MMCR），采用新型数字接收机，相比MMCR具备更优异的空间与时间分辨率。此外，KAZR可显著降低数据中的频谱伪影，使研究人员能够比使用MMCR时更深入细致地开展云动力学研究。 目前已公开2018至2019年阿根廷地区云、气溶胶与复杂地形相互作用（Cloud, Aerosol, and Complex Terrain Interactions，CACTI）野外试验的KAZR数据，其格式为b1级产品。该b1级产品基于原始CACTI运行数据构建，通过大量分析与校正流程实现了数据质量的提升。数据已完成跨基准点校准，针对试验期间出现的运行问题对数据流进行了校正，并集成了多组数据质量掩码与基础衍生产品。如需了解更多细节，请参阅《CACTI雷达b1级处理报告》。