This is Matlab code for modeling the radiance ratios of ShadowCam stereo observations. The modeling work is based on Hapke's radiative transfer models. Detailed model description and parameterization can be found in this paper: "Shuai Li, Mark S. Robinson, Brett W. Denevi, Madeleine R. Manheim, Erwan Mazarico, Robert V. Wagner, Emerson J. Speyerer, and Prasun Mahanti, Searching for surficial water ice in lunar permanently shaded regions (PSRs) with ShadowCam, Science Advances". For any further inquiries, please contact with the corresponding author Dr. Shuai Li at shuaili@hawaii.edu