Neutron monitor counting rates and solar wind velocity, interplanetary magnetic field, sunspot number and total solar irradiance measurements from 2013 to 2018 corresponding to the end of solar maximum and the decreasing phase of the Solar Cycle 24 have been used. The main objective is to check whether the periodicities observed in the cosmic rays are affected by the magnetic rigidity or the height at which the neutron monitors are placed. A Global Neutron Monitor (GNM) has been defined as representative of the neutron monitor global network. This GNM is constructed by averaging the counting rates of a set of selected neutron monitors. The selection process is based on the combination of three new data quality criteria, which are applied to neutron monitors in the Neutron Monitor Data Base giving a final pool of 22 selected neutron monitors. Morlet wavelet analysis is applied to the GNM and the selected solar activity parameters to find the common periodicities. Short-term periodicities of 13.5, 27, 48, 92, 132 and 298 days have been observed in cosmic ray intensity. A clear inverse relationship between rigidity and spectral power has been obtained for the 13.5-, 48-, 92-, 132-day periods. A not so clear but still observed direct relationship between the height of the neutron monitors and the spectral power for the 48-, 92-, 132-day periods has been also found. The periodicity of 92 days is the one which shows the highest dependence with rigidity cutoff and height. As far as we know, this is the first time that these dependencies are reported. We think that these observations could be explained by assuming some cosmic ray intensity energy dependence in such periodicities and a competitive effect between rigidity and height.

中文翻译：

---

在中子监测计数率中观察到的短期周期性

中子监测器计数率和太阳风速、行星际磁场、太阳黑子数和 2013 年至 2018 年的总太阳辐照度测量值对应于太阳活动极大值的结束和太阳活动周期 24 的下降阶段。主要目的是检查在宇宙射线中观察到的周期性是否受到磁刚度或中子监测器放置高度的影响。全球中子监测器 (GNM) 已被定义为中子监测器全球网络的代表。该 GNM 是通过对一组选定的中子监测器的计数率求平均值来构建的。选择过程基于三个新数据质量标准的组合，这些标准应用于中子监测器数据库中的中子监测器，最终形成了 22 个选定的中子监测器。Morlet 小波分析应用于 GNM 和选定的太阳活动参数，以找到共同的周期性。已在宇宙射线强度中观察到 13.5、27、48、92、132 和 298 天的短期周期性。对于 13.5 天、48 天、92 天、132 天的周期，已经获得了刚性和光谱功率之间的明显反比关系。还发现了中子监测器的高度与 48、92、132 天周期的光谱功率之间不那么清楚但仍然观察到的直接关系。92 天的周期是显示与刚性截止和高度相关性最高的周期。据我们所知，这是第一次报告这些依赖关系。