NAMMA SECOND GENERATION AIRBORNE PRECIPITATION RADAR (APR-2) V1

The NAMMA Second Generation Airborne Precipitation Radar (APR-2) dataset was collected by using the Second Generation Airborne Precipitation Radar (APR-2), which is a dual-frequency (14 GHz and 35 GHz), Doppler, dual-polarization radar system that includes digital, real-time pulse compression, extremely compact RF electronics, and a large deployable dual-frequency cylindrical parabolic antenna subsystem. This system measures radar reflectivity and doppler velocity at both the Ku- and Ka-band. These data files were generated during support of the NASA African Monsoon Multidisciplinary Analyses (NAMMA) campaign, a field research investigation sponsored by the Science Mission Directorate of the National Aeronautics and Space Administration (NASA). This mission was based in the Cape Verde Islands, 350 miles off the coast of Senegal in west Africa. Commencing in August 2006, NASA scientists employed surface observation networks and aircraft to characterize the evolution and structure of African Easterly Waves (AEWs) and Mesoscale Convective Systems over continental western Africa, and their associated impacts on regional water and energy budgets.

NAMMA第二代机载降水雷达（APR-2）数据集，通过采用第二代机载降水雷达（APR-2）收集而成。该雷达系统为双频段（14 GHz和35 GHz）、多普勒、双极化雷达，集成了数字实时脉冲压缩、极其紧凑的射频电子设备以及一个大型可展开的双频段圆柱形抛物面天线子系统。该系统可测量Ku频段和Ka频段的雷达反射率和多普勒速度。这些数据文件是在支持美国国家航空航天局（NASA）非洲季风多学科分析（NAMMA）行动期间生成的，该行动是一项由NASA科学任务局赞助的现场研究调查。该任务以佛得角群岛为基地，位于西非塞内加尔海岸350英里处。自2006年8月起，NASA科学家利用地表观测网络和飞机，对西非大陆上的非洲东风波（AEWs）和中尺度对流系统（Mesoscale Convective Systems）的演变和结构进行表征，并研究它们对区域水资源和能量收支的影响。