Comparison between v_z, halo and v_z, kSZ under different weather conditions (pwv = 0.5 mm, 1.0 mm, 1.5 mm, and 2.0 mm) with given bounds for kT for a 30-meter radio telescope. The results in these four figures are based on measurements with an aperture size of R₂₀₀. The solid lines represent v_z, kSZ = v_z, halo, and the gray regions represent the rms scatters of the v_z, kSZ = v_z, halo lines at a given x-axis for all galaxy clusters in our sample. The dashed lines are the best-fit lines of the data points excluding |v_z, kSZ|> 500 km s⁻¹, and ‘m’ in the legends are the slopes of the best-fit lines.