TY JOUR TI Bistatic Doppler spectrum of radiation reflected by a water surface KW scattering cross-section KW Doppler spectrum KW statistically rough wave KW scattering surface KW antenna radiation pattern KW kirchhoff approximation KW quasi-specular scattering KW bistatic remote sensing of the sea surface KW slope variance KW the variance of the vertical component of the orbital velocity KW reflected signal of satellite navigation systems JO Russian Journal of Earth Sciences AU Titchenko, Y.A. PY 2020 IS 20 PB Geophysical Center of the Russian Academy of Sciences