Temporal variations of the pressure corrected daily mean count rates recorded by NMs and MDs. From top to bottom, each panel displays the percent deviation from the average of daily mean count rates in Nagoya MD vertical channel (NGY_MD_V), Syowa MD vertical channel (SYO_MD_V), Syowa NM (SYO_NM), Polar Bare NM (SOPB), and South Pole NM (SOPO), during a period between February, 2018 and October, 2019. Representative error of each data point is less than 0.1%. MD data in top two panels show clear seasonal variations due to the atmospheric temperature effect. Minor tick marks on the horizontal axis are indicated every 27 days.