TY JOUR TI Numerical Simulation of Radar Signal Reflected by Sea Surface with Different Sea Ice Concentration KW sea ice KW sea waves KW backscattering cross section KW small incidence angles KW quasi-specular reflection KW sea ice concentration JO Russian Journal of Earth Sciences AU Titchenko, Y.A. AU Karaev, V.Y. AU Panfilova, M.A. AU Ponur, K.A. AU Kuznetsov, Y.A. AU Meshkov, E.M. PY 2025 IS 25 PB Geophysical Center of the Russian Academy of Sciences