Ka ARM Zenith Radar (KAZR): general mode - kazrge

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）通过毫米波段遥感探测云的分布范围与组成。该雷达为天顶指向式多普勒雷达，工作频率约35吉赫兹，核心功能是获取从近地面至近20千米高度、距离分辨率约30米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，其空间与时间分辨率均优于MMCR。此外，KAZR的数据中频谱伪影显著减少，使得研究人员可相较使用MMCR时更精准地开展云动力学研究。

2018至2019年在阿根廷开展的云、气溶胶与复杂地形相互作用（Cloud, Aerosol, and Complex Terrain Interactions，CACTI）野外试验所获取的KAZR数据，现已以b1级产品形式公开。相较于原始CACTI业务数据，b1级产品通过全面分析与修正实现了数据质量提升：数据已被交叉校准至统一基准，针对试验期间出现的业务问题完成了数据流校正，并集成了多套数据质量掩码及基础衍生产品。如需获取更多相关信息，请参阅《CACTI雷达b1级处理报告》。