Multiyear Arctic Sea Ice Parameters Derived from ASCAT Data Using Volume Scattering Model

The article considers the calculation of the parameters of the volume scattering model using a nonlinear optimization algorithm which allows determining the properties of multiyear ice: the real and imaginary parts of the dielectric constant and numerical density of air inclusions. This approach is justified by the fact that the volume scattering model contains two independent parameters - the volume fraction of air inclusions and their radiuses, therefore, there are many solutions for calculating the volume scattering parameters. The coefficients of the model are selected according to the RMSE criterion of scatterometric measurements from the values of the calculated function under angles of incidence greater than 55 degrees. The proposed calculation algorithm has certain sensitivity to the analyzed data, which expands the range of known parameters of sea ice for task of its differentiation.