Transmission spectra of Na I, Mg I, Hα, and Hβ for each night. Left (T1), middle (T2), and right (T3). The grey line represents the raw transmission spectra in the PRF which has been corrected for CLV+RM effects, The black dotted line represents the binned spectra of 0.1 Å and the Gaussian fitting is shown in red line. The dashed green vertical line represent the static position of atom individual line at vacuum wavelength.