Backscattering Properties of Nonspherical Ice Particles Calculated by Geometrical-Optics-Integral-Equation MethodKazuhiko Masuda, Hiroshi Ishimoto, Tetsu Sakai and Hajime OkamotoEPJ Web of Conferences, 119 (2016) 16001DOI: https://doi.org/10.1051/epjconf/201611916001