Occurrence of raw counts per energy channel. Top left: Distribution of counts as a function of energy for the observations obtained from 14:50:19UT to 17:35:19UT on 15-06-2020, by EAS 1 and (top right) by EAS 2. Each bin of the histogram shows the sum of the counts within the time interval, elevation bins and azimuth sectors. The black data-points show the median value of counts in each energy bin. Bottom left: Median value of counts in each energy bin as measured by EAS 1. Bottom right: Median value of counts in each energy bin as measured by EAS2. The red and magenta dashed lines show models of the photo-electrons and thermal electrons respectively. Photo-electrons and thermal electrons are well separated 10 eV.