Fitted Doppler velocity as a function of line depth of Fe I lines for various μ positions. The weighted mean (“wm”) of these μ positions is also displayed. Velocities obtained from the integrated IAG atlas (“int”) are presented for comparison. For μ = 1.0 and μ = 0.2, we show binned data points of line depth of chunks of 0.06. The shaded areas represent the standard deviation of the bins for those μs.