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Title: Shigaraki UAV-Radar Experiment (ShUREX): overview of the campaign with some preliminary results
Authors: Kantha, Lakshmi
Lawrence, Dale
Luce, Hubert
Hashiguchi, Hiroyuki  kyouindb  KAKEN_id  orcid (unconfirmed)
Tsuda, Toshitaka
Wilson, Richard
Mixa, Tyler
Yabuki, Masanori  kyouindb  KAKEN_id
Author's alias: 矢吹, 正教
Keywords: VHF radar
MU radar
MST radar
Unmanned aerial vehicles
Turbulent mixing
Sheets and layers
High humidity gradient sheets
Mid-level cloud-base turbulence
Convective boundary layer
Kelvin-Helmholtz instability
Moist troposphere
Issue Date: 17-Jul-2017
Publisher: Springer Nature
Journal title: Progress in Earth and Planetary Science
Volume: 4
Thesis number: 19
Abstract: The Shigaraki unmanned aerial vehicle (UAV)-Radar Experiment (ShUREX) is an international (USA-Japan-France) observational campaign, whose overarching goal is to demonstrate the utility of small, lightweight, inexpensive, autonomous UAVs in probing and monitoring the lower troposphere and to promote synergistic use of UAVs and very high frequency (VHF) radars. The 2-week campaign lasting from June 1 to June 14, 2015, was carried out at the Middle and Upper Atmosphere (MU) Observatory in Shigaraki, Japan. During the campaign, the DataHawk UAV, developed at the University of Colorado, Boulder, and equipped with high-frequency response cold wire and pitot tube sensors (as well as an iMET radiosonde), was flown near and over the VHF-band MU radar. Measurements in the atmospheric column in the immediate vicinity of the radar were obtained. Simultaneous and continuous operation of the radar in range imaging mode enabled fine-scale structures in the atmosphere to be visualized by the radar. It also permitted the UAV to be commanded to sample interesting structures, guided in near real time by the radar images. This overview provides a description of the ShUREX campaign and some interesting but preliminary results of the very first simultaneous and intensive probing of turbulent structures by UAVs and the MU radar. The campaign demonstrated the validity and utility of the radar range imaging technique in obtaining very high vertical resolution (~20 m) images of echo power in the atmospheric column, which display evolving fine-scale atmospheric structures in unprecedented detail. The campaign also permitted for the very first time the evaluation of the consistency of turbulent kinetic energy dissipation rates in turbulent structures inferred from the spectral broadening of the backscattered radar signal and direct, in situ measurements by the high-frequency response velocity sensor on the UAV. The data also enabled other turbulence parameters such as the temperature structure function parameter CT2 and refractive index structure function parameter Cn2 to be measured by sensors on the UAV, along with radar-inferred refractive index structure function parameter Cn, radar2. The comprehensive dataset collected during the campaign (from the radar, the UAV, the boundary layer lidar, the ceilometer, and radiosondes) is expected to help obtain a better understanding of turbulent atmospheric structures, as well as arrive at a better interpretation of the radar data.
Description: The Correction to this article has been published in Progress in Earth and Planetary Science 2018 5:48
Rights: © The Author(s). 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
DOI(Published Version): 10.1186/s40645-017-0133-x
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