Articles | Volume 18, issue 21
https://doi.org/10.5194/amt-18-5985-2025
https://doi.org/10.5194/amt-18-5985-2025
Research article
 | 
03 Nov 2025
Research article |  | 03 Nov 2025

Development and validation of a ground-based Asymmetric Spatial Heterodyne Spectroscopy (ASHS) system for sounding neutral wind in the mesopause

Guangyi Zhu, Yajun Zhu, Martin Kaufmann, Tiancai Wang, Weijun Liu, Wei Yuan, Siyin Liu, Guotao Yang, and Jiyao Xu

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Short summary
Winds in the mesopause region (85–100  km altitude) drive upper-atmospheric dynamics and energy transfer. We present the Asymmetric Spatial Heterodyne Spectrometer, a ground-based instrument, to measure winds by observing the green airglow of atomic oxygen. Lab tests demonstrated the instrument achieves better than 2 m/s accuracy. Field measurements at a high-latitude site in China showed strong agreement with independent LiDAR data, confirming that the system delivers reliable wind retrievals.
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