Structural evolution of long-duration meteor trail irregularities driven by neutral wind

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Title:	Structural evolution of long-duration meteor trail irregularities driven by neutral wind
Authors:	朱延祥;Li, Guozhu;Ning, Baiqi;Chu, Yen-Hsyang;Reid, I. M.;Hu, L.;Dolman, B. K.;Xiong, J.;Jiang, G.;Yang, G.;Yan, C.
Contributors:	太空科學與科技研究中心
Keywords:	Altitude;Astrophysics;Boresights;Coherent radar;Echoes;Evolution;Geomagnetic field;Interferometry;Irregularities;meteor trail irregularity;Meteor trails;Meteors;Meteors & meteorites;neutral wind;Radar;Radar beams;radar interferometry;range spread trail echo;Spatial analysis;Velocity distribution;Wind measurement
Date:	2014-01-01
Issue Date:	2026-04-23 11:03:44 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
Abstract:	摘要： An experiment on spatial domain interferometry observations of meteor trail irregularities at a low‐latitude location in China was conducted during August 2013 using the Sanya VHF coherent radar (18.4°N, 109.6°E). More than 3 thousand range‐spread meteor trail echoes (RSTEs) were observed. Among the trail echoes, the spatial structure of meteor trail irregularities responsible for a single long‐duration RSTE event persisting for ~4 min was reconstructed. This RSTE was found to be initially generated at 90–115 km altitudes and aligned along the radar beam boresight. After about the first minute of the trail lifetime, the trail echo appeared only in a narrow altitude range of 94–98 km. An analysis on the spatial pattern of the long‐duration RSTE showed that the trail irregularities at lower range gates moved away from the region perpendicular to the geomagnetic field. The eastward drifts of the RSTE irregularities were found to decrease with increasing altitude, e.g., from 80 ms−1 at ~94 km to 20 ms−1 at ~100 km. Simultaneous horizontal neutral wind measurements made with the Fuke all‐sky meteor radar (located north of Sanya) recorded a similar velocity profile. We suggest that the neutral wind could drive the spatial structural evolution of the RSTE irregularities, and help to determine the altitudes where the longest portion of the RSTE was located. Key Points The Sanya radar interferometry observation of a long‐duration meteor trail The trail structural evolution from strip type to layer type is detected Factors responsible for the characteristics of long‐duration trail are studied 其他題名： J. Geophys. Res. Space Physics 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2014-12 出處： Journal of geophysical research : Space physics (2013 - Present), 2014-12, Vol.119 (12), p.10,348-10,357 資源來源： Wiley Online Library - AutoHoldings Journals 版權： 2014. American Geophysical Union. All Rights Reserved. 版權： 2015. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-9380 識別號： ISSN: 2169-9402 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/2014JA020116
Appears in Collections:	[CENTER FOR ASTRONAUTICAL PHYSICS AND ENGINEERING (CAPE)] journal & Dissertation

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