CryoRad consists of a single satellite equipped with a broadband low-frequency microwave radiometer operating in the range 0.4 to 2 GHz with continuous frequency scanning. The CryoRad mission aims to produce key scientific data for advancing cryosphere studies. It will provide temperature profiles of Antarctic and Greenland ice sheets, extending from surface to base, a dataset previously available only through limited borehole observations. The mission will also address uncertainties in sea surface salinity (SSS) measurements in cold waters, overcoming limitations of current L-band radiometers. Furthermore, CryoRad will enhance estimates of sea ice thickness and deliver the first spaceborne observations of sea ice salinity. In this presentation, we will discuss the potential impact of CryoRad measurements in determining sea ice properties and their benefits for ocean and climate modeling. Moreover we will provide information on uncertainties in determining sea ice parameters, focusing on simulations due to the limited availability of suitable measurements. Models of varying complexity, from one-dimensional thermodynamic sea-ice models to coupled ocean-sea-ice systems, will be used. The analysis will utilize new data from ECMWF’s ORAS6 ocean reanalysis, which includes a multicategory sea-ice model with prognostic salinity, as input for brightness temperature simulations. ORAS6 will also serve as a baseline to examine the spatio-temporal co-variability of key geophysical parameters (e.g., sea ice concentration, thickness, and salinity) and their relationship to simulated brightness temperature observations. Special attention will be given to the new sea ice salinity forecast parameter in both hemispheres.