Atmospheric structures in the troposphere as revealed by high-resolution backscatter images from MU radar operating in range-imaging mode
Atmospheric structures in the troposphere as revealed by high-resolution backscatter images from MU radar operating in range-imaging mode
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在距离成像模式下运行的 MU 雷达的高分辨率反向散射图像揭示了对流层的大气结构
DOI：
10.1186/s40645-019-0274-1
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发表时间：
2019
影响因子：
3.9
通讯作者：
Abhiram Doddi
中科院分区：
文献类型：
--
作者：
L. Kantha;H. Luce;H. Hashiguchi;Abhiram Doddi
摘要全球甚高频平流层/对流层（ST）雷达很少采用距离成像模式。因此，它们的后向散射图像的典型距离分辨率约为150米。唯一的例外是日本京都大学的中高层大气（MU）雷达。使用频率分集的距离成像于2005年在那里实施，从那时起就经常使用。在2015年、2016年和2017年春/夏的Shigaraki无人机雷达实验（ShUREX）活动期间，MU雷达在距离成像模式下运行，通常提供20米的距离分辨率，具有良好的信噪比（SNR）。由此产生的Capon背向散射图像非常详细地揭示了潮湿对流层中的各种大气结构。它们在无人机（uav）上部署原位传感器以接近实时的图像引导探测此类结构方面也非常有用。本文的目的是提出和讨论一些对大气动力学感兴趣的结构，以提供一个总体的观点。它们包括由切变不稳定产生的开尔文-亥姆霍兹（KH）湍流、潮湿对流层中由对流不稳定产生的中层云底湍流（MCT）层、对流边界层（CBL）以及稳定分层大气柱中的片层结构。2015年和2016年活动期间收集的雷达图像视频作为附加文件1包括在内，以展示MU雷达上迷人的，不断变化的大气结构演变。
AbstractVHF band stratosphere/troposphere (ST) radars around the globe are seldom operated in range-imaging mode. As such, the typical range resolution of their backscatter images is about 150 m. The only exception is the Kyoto University’s Middle and Upper Atmosphere (MU) radar in Shigaraki, Japan. Range imaging using frequency diversity was implemented there in 2005 and has often been used since then. During the Shigaraki UAV Radar Experiment (ShUREX) campaigns in the spring/summers of 2015, 2016, and 2017, the MU radar was operated in range-imaging mode to provide a range resolution of typically 20 m, for good signal to noise (SNR) ratios. The resulting Capon backscatter images revealed a variety of atmospheric structures in the moist troposphere in great detail. They were also quite useful in deploying in situ sensors on board unmanned aerial vehicles (UAVs) to probe such structures in near real time guided by the images. The goal of this paper is to present and discuss some such structures of interest to atmospheric dynamics collectively, to provide an overarching view. They include Kelvin-Helmholtz (KH) billows generated by shear instability, mid-level cloud-base turbulence (MCT) layers generated by convective instability in a moist troposphere, convective boundary layer (CBL), and sheet and layer (S&L) structures in a stably stratified atmospheric column. Videos of radar images collected during the 2015 and 2016 campaigns are included as Additional file 1 to demonstrate the fascinating, ever-changing evolution of atmospheric structures over the MU radar.
ShuUREX 2015 期间通过 MU 雷达、无人机和气球测量得出的对流层低层垂直结构
影响因子：
3.9
作者：
Luce, Hubert;Kantha, Lakshmi;Hashiguchi, Hiroyuki;Lawrence, Dale;Mixa, Tyler;Yabuki, Masanori;Tsuda, Toshitaka
通讯作者：
Tsuda, Toshitaka
信乐无人机雷达实验（ShUREX）：活动概述及一些初步结果
影响因子：
3.9
作者：
Kantha, Lakshmi;Lawrence, Dale;Luce, Hubert;Hashiguchi, Hiroyuki;Tsuda, Toshitaka;Wilson, Richard;Mixa, Tyler;Yabuki, Masanori
通讯作者：
Yabuki, Masanori
关于 ShuUREX 2015 活动期间使用无人机估计的距离成像技术的性能
影响因子：
8.2
作者：
Luce, Hubert;Hashiguchi, Hiroyuki;Kantha, Lakshmi;Lawrence, Dale A.;Tsuda, Toshitaka;Mixa, Tyler;Yabuki, Masanori
通讯作者：
Yabuki, Masanori