Cloud Radar System (CRS) IMPACTS

The Cloud Radar System (CRS) IMPACTS dataset consists of calibrated radar reflectivity, Doppler velocity, linear depolarization ratio, and normalized radar cross-section estimates collected by the Cloud Radar System (CRS) onboard the NASA ER-2 high-altitude research aircraft. These data were gathered during the Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) field campaign. IMPACTS was a three-year sequence of winter season deployments conducted to study snowstorms over the U.S. Atlantic Coast (2020-2023). The campaign aimed to (1) Provide observations critical to understanding the mechanisms of snowband formation, organization, and evolution; (2) Examine how the microphysical characteristics and likely growth mechanisms of snow particles vary across snowbands; and (3) Improve snowfall remote sensing interpretation and modeling to significantly advance prediction capabilities. The CRS IMPACTS dataset files are available from January 25, 2020, through February 28, 2023, in HDF-5 format.

NASA ER-2高空研究机搭载的云雷达系统（CRS）所采集的校准雷达反射率、多普勒速度、线性去极化比以及归一化雷达截面积估算数据构成了云雷达系统（CRS）IMPACTS数据集。该数据集的收集是在针对大西洋沿岸威胁性暴风雪的微物理和降水调查（IMPACTS）现场活动中进行的。IMPACTS是一项为期三年的冬季部署序列（2020-2023），旨在研究美国大西洋沿岸的暴风雪。该活动旨在（1）提供对雪带形成、组织及演变机制至关重要的观测；（2）探讨雪粒的微物理特性和可能的增长机制在雪带之间的变化；（3）提升降雪的遥感解释和模型构建，以显著推进预测能力。CRS IMPACTS数据集文件自2020年1月25日起至2023年2月28日止，以HDF-5格式提供。