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

The GRIP Airborne Second Generation Precipitation Radar (APR-2) dataset was collected from the Second Generation Airborne Precipitation Radar (APR-2), which is a dual-frequency (13 GHz and 35 GHz), Doppler, dual-polarization radar system. It has a downward looking antenna that performs cross track scans. Additional features include: simultaneous dual-frequency, matched beam operation at 13.4 and 35.6 GHz (same as GPM Dual-Frequency Precipitation Radar), simultaneous measurement of both like- and cross-polarized signals at both frequencies, Doppler operation, and real-time pulse compression (calibrated reflectivity data can be produced for large areas in the field during flight, if necessary). The APR-2 flew on the NASA DC-8 for the Genesis and Rapid Intensification Processes (GRIP) experiment and collected data between Aug 17, 2010 - Sep 22, 2010 and are in HDF-4 format. The major goal was to better understand how tropical storms form and develop into major hurricanes. NASA used the DC-8 aircraft, the WB-57 aircraft and the Global Hawk Unmanned Airborne System (UAS), configured with a suite of in situ and remote sensing instruments that were used to observe and characterize the lifecycle of hurricanes.

GRIP航空第二代降水雷达（APR-2）数据集由第二代航空降水雷达（APR-2）收集而成，该雷达系统具备双频段（13 GHz和35 GHz）多普勒双极化特性。该系统装备有向下观测的天线，执行交叉轨迹扫描。此外，其特色功能还包括：在13.4 GHz和35.6 GHz（与GPM双频段降水雷达相同）频率上实现同时双频段匹配波束操作，同时在两个频率下对同极化和交叉极化信号进行测量，多普勒操作，以及实时脉冲压缩（在必要时，可在飞行过程中对大面积区域产生校准反射率数据）。APR-2在NASA DC-8飞机上进行Genesis和快速增强过程（GRIP）实验，收集了2010年8月17日至2010年9月22日之间的数据，并以HDF-4格式存储。其主要目标是为了更深入地理解热带风暴如何形成并发展成为重大飓风。NASA利用DC-8飞机、WB-57飞机以及配备有全套现场和遥感仪器的全球鹰无人机系统（UAS）进行配置，以观测和描述飓风的整个生命周期。