IGRINS spectra of Ca I lines at 1.978 and 1.987 μm and Na I lines at 2.206 and 2.209 μm observed in different epochs (gray and red colors indicate two epochs as presented in the top of the first panel.) and the synthesized spectra for the best-fit Keplerian disk model (cyan line, see Section 3.1.2) for IRAS 03445+3242. The horizontal axis is the velocity relative to the systemic velocity in Table 2. The observed spectra are boxcar smoothed by 15 km s⁻¹ to present the spectral features clearly. The vertical arrows in the second and third panels indicate the wavelength positions of Ca I 1.986 μm and Sc I 2.206 μm, respectively. The dotted lines represent the observation errors (±3σ). Note that the wavelength of atomic lines is adopted from Rayner et al. (2009).