A high time resolution 2 m² tracking detector, based on timing Resistive Plate Chamber (tRPC) cells, has been installed at the Faculty of Physics of the University of Santiago de Compostela (Spain) in order to improve our understanding of the cosmic rays arriving at the Earth's surface. Following a short commissioning of the detector, a study of the atmospheric temperature effect of the secondary cosmic ray component was carried out. To take into account this effect, temperature coefficients, W_T(h), were obtained from cosmic ray data using a method based on Principal Component Analysis (PCA). The results obtained show good agreement with the theoretical expectation. The method successfully removes the correlation present between the different atmospheric layers, which would be dominant otherwise. We briefly describe the initial calibration and pressure correction procedures, essential to isolate the temperature effect. Overall, the measured cosmic ray rate displays the expected anticorrelation with the effective atmospheric temperature, through the coefficient α_T=−0.279±0.051%/K. Rates follow the seasonal variations, and unusual short‐term events are clearly identified too.

中文翻译：

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用2 m2地面tRPC探测器观测到的二次宇宙射线中的大气温度效应

基于定时电阻板腔（tRPC）电池的高分辨率2 m ²跟踪探测器已安装在圣地亚哥德孔波斯特拉大学（西班牙）的物理学院，以增进我们对到达的宇宙射线的理解在地球表面。在探测器短暂调试后，对次级宇宙射线分量的大气温度影响进行了研究。考虑到这种影响，温度系数W _T（h）是使用基于主成分分析（PCA）的方法从宇宙射线数据中获得的。所得结果与理论预期吻合良好。该方法成功地消除了不同大气层之间存在的相关性，否则该相关性将占主导地位。我们简要介绍了初始校准和压力校正程序，这对于隔离温度影响至关重要。总体而言，测得的宇宙射线率显示预期反相关与有效大气温度，通过系数α _Ť = -0.279±0.051％/ K。价格随季节变化而变化，并且也清楚地识别了异常的短期事件。