This paper presents for the first time results on winds, tides, gradients of horizontal winds, and momentum fluxes at mesosphere and lower thermosphere altitudes over southern Patagonia, one of the most dynamically active regions in the world. For this purpose, measurements provided by SIMONe Argentina are investigated. SIMONe Argentina is a novel multistatic specular meteor radar system that implements a Spread‐spectrum Interferometric Multistatic meteor radar Observing Network (SIMONe) approach, and that has been operating since the end of September 2019. Average counts of more than 30,000 meteor detections per day result in tidal estimates with statistical uncertainties of less than 1 m/s. Thanks to the multistatic configuration, horizontal and vertical gradients of the horizontal winds are obtained, as well as vertical winds free from horizontal divergence contamination. The vertical gradients of both zonal and meridional winds exhibit strong tidal signatures. Mean momentum fluxes are estimated after removing the effects of mean winds using a 4‐h, 8‐km window in time and altitude, respectively. Reasonable statistical uncertainties of the momentum fluxes are obtained after applying a 28‐day averaging. Therefore, the momentum flux estimates presented in this paper represent monthly mean values of waves with periods of 4 h or less, vertical wavelengths shorter than 8 km, and horizontal scales less than 400 km.

中文翻译：

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在南巴塔哥尼亚使用多静态镜面流星雷达网络对中层和低层热层动力学的初步研究

本文首次介绍了巴塔哥尼亚南部（世界上最活跃的地区之一）的中层和较低热层高度的风，潮汐，水平风梯度和动量通量的结果。为此，对SIMONe Argentina提供的测量进行了研究。SIMONe Argentina是一种新颖的多静态镜面流星雷达系统，该系统实现了扩频干涉多静态流星雷达观测网络（SIMONe）方法，自2019年9月以来一直在运行。每天平均检测到30,000多个流星统计上的不确定性小于1 m / s的潮汐估计值。得益于多静态配置，可以获得水平风的水平和垂直梯度，以及垂直风不受水平发散污染。纬向和经向风的垂直梯度都表现出强烈的潮汐特征。在分别使用4小时，8公里的时间和高度窗口消除平均风的影响后，估算平均动量通量。应用28天平均后，可获得动量通量的合理统计不确定性。因此，本文提出的动量通量估计值表示周期为4 h或更短，垂直波长小于8 km，水平尺度小于400 km的波浪的月平均值。时间和高度分别为8公里的窗口。应用28天平均后，可获得动量通量的合理统计不确定性。因此，本文提出的动量通量估计值表示周期为4 h或更短，垂直波长小于8 km，水平尺度小于400 km的波浪的月平均值。时间和高度分别为8公里的窗口。应用28天平均后，可获得动量通量的合理统计不确定性。因此，本文提出的动量通量估计值表示周期为4 h或更短，垂直波长小于8 km，水平尺度小于400 km的波浪的月平均值。