HURRICANE AND SEVERE STORM SENTINEL (HS3) HIGH-ALTITUDE IMAGING WIND AND RAIN AIRBORNE PROFILER (HIWRAP) V1

The Hurricane and Severe Storm Sentinel (HS3) High-Altitude Imaging Wind and Rain dataset was collected from the High-altitude Imaging Wind and Rain Airborne Profiler (HIWRAP), which is a dual-frequency (Ku- and Ka-band, or approximately 14 and 35 GHz), dual-beam (30 degree and 40 degree incidence angle), conically scanning radar that has been designed for the Global Hawk aircraft during the HS3 campaign. Goals for HS3 included: assessing the relative roles of large-scale environment and storm-scale internal processes; and addressing the controversial role of the Saharan Air Layer (SAL) in tropical storm formation and intensification as well as the role of deep convection in the inner-core region of storms. HIWRAP uses solid state transmitters along with a novel pulse compression scheme that results in a system that is considerably more compact and requires less power than typical radars used for precipitation and wind measurements. By conically scanning at 10-20 rpm, its beams sweeped below the Global Hawk collecting Doppler velocity/reflectivity profiles. The unique HIWRAP sampling and phase correction strategy implemented (frequency diversity Doppler processing technique). HIWRAP's dual-wavelength operation enables it to map full tropospheric winds from cloud and precipitation volume backscatter measurements, derive information about precipitation drop-size distributions, and estimate the ocean surface winds using scatterometry techniques. Winds will be retrieved using a gridding approach similar to well-established ground-based multi-Doppler radar wind analyses. More information can be found at http://har.gsfc.nasa.gov/index.php?section

《飓风与强烈风暴哨兵》（HS3）高空成像风与雨数据集，由高空成像风与雨机载剖面雷达（HIWRAP）收集而成。HIWRAP为一款双频段（Ku波段与Ka波段，或约14GHz与35GHz）、双波束（30度与40度入射角）锥形扫描雷达，专为HS3任务中的全球鹰无人机设计。HS3项目旨在评估大规模环境与风暴尺度内部过程之间的相对作用；探讨撒哈拉空气层（SAL）在热带风暴形成与增强中的争议性作用，以及深对流在风暴核心区域的作用。HIWRAP采用固态发射器及创新的脉冲压缩方案，使系统体积更加紧凑，功率消耗低于常规的降水与风速测量雷达。通过以每分钟10-20转的速度锥形扫描，其波束扫描至全球鹰下方，收集多普勒速度/反射率剖面。HIWRAP独特的采样与相位校正策略（频率多样性多普勒处理技术）得以实施。HIWRAP的双波长操作使其能够通过云和降水体积后向散射测量绘制整个对流层的风场图，从降水粒子大小分布中提取信息，并利用散射计技术估算海面风速。风速的提取将通过类似已建立的地面多多普勒雷达风场分析的方法进行。更多详细信息请访问http://har.gsfc.nasa.gov/index.php?section