Preprints
https://doi.org/10.5194/amt-2022-254
https://doi.org/10.5194/amt-2022-254
 
07 Dec 2022
07 Dec 2022
Status: this preprint is currently under review for the journal AMT.

Multistatic meteor radar observations of two-dimensional horizontal MLT wind

Wen Yi1,2, Jie Zeng1,2, Xianghui Xue1,2,3, Iain Reid4,5, Wei Zhong1,2, Jianfei Wu1,2, Tingdi Chen1,2, and Xiankang Dou1,6 Wen Yi et al.
  • 1Deep Space Exploration Laboratory / School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
  • 2CAS Key Laboratory of Geospace Environment/CAS Center for Excellence in Comparative Planetology, Anhui Mengcheng Geophysics National Observation and Research Station, University of Science and Technology of China, Hefei 230026, China
  • 3Collaborative Innovation Center of Astronautical Science and Technology, Harbin, China
  • 4ATRAD Pty Ltd., Adelaide, SA 5000, Australia
  • 5School of Physical Sciences, University of Adelaide, Adelaide, SA 5000, Australia
  • 6Electronic Information School, Wuhan University, Wuhan, China

Abstract. All-sky meteor radars have become a reliable and widely used tool to observe horizontal winds in the mesosphere and lower thermosphere (MLT) region. The horizontal winds estimated by conventional single-station radars are obtained after averaging all meteor detections based on the assumption of the homogeneity of the horizontal wind in the meteor detection area (approximately 200–300 km radius). In this study, to improve the horizontal winds, we apply a multistatic meteor radar system consisting of a monostatic meteor radar in Mengcheng (33.36° N, 116.49° E) and a bistatic remote receiver in Changfeng (31.98° N, 117.22° E), separated by approximately 167 km to increase the number of meteors by at least 70 % and provide two different viewing angles of the meteor echoes. The accuracy of the horizontal wind measurement depends on the meteor number in time and altitude intervals. Compared to typical monostatic meteor radar, our approach shows the feasibility of estimating the two-dimensional horizontal wind field. The technique allows us to estimate the mean horizontal wind and the gradient terms of the horizontal wind, moreover, the horizontal divergence, relative vorticity, stretching and shearing deformation of the wind field. We are confident that the improved horizontal wind parameters will contribute to improving the understanding of the dynamics in the MLT region.

Wen Yi et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2022-254', Anonymous Referee #4, 12 Dec 2022
  • RC2: 'Comment on amt-2022-254', Anonymous Referee #2, 19 Dec 2022
  • RC3: 'Comment on amt-2022-254', Anonymous Referee #1, 25 Dec 2022
  • RC4: 'Comment on amt-2022-254', Anonymous Referee #3, 01 Jan 2023

Wen Yi et al.

Wen Yi et al.

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Short summary
In recent years, the concept of multistatic meteor radar systems has attracted the attention of the atmospheric radar community, focusing on the MLT region. In this study, we apply a multistatic meteor radar system consisting of a monostatic meteor radar in Mengcheng (33.36° N, 116.49° E) and a remote receiver in Changfeng (31.98° N, 117.22° E) to estimate the two-dimensional horizontal wind field, and the horizontal divergence and relative vorticity of the wind field.