Investigation of the Martian thermal parameters with radiowave active-passive approach

The use of radiowave methods for the investigation of the Earth group planets allows one to derive data about the subsurface characteristics. One of the main goals of the current Russian Martian project is the investigation, by means of radar equipment placed on a space platform, of new data about the Martian surfaxe. Cryosphere data is particularly required. The derivation of these data is based on the measurements of the reflection characteristics of the surface that depend on its dielectric permittivity. However, these measurements do not allow thermal characteristics of the Martian surface to be derived. In the present paper a radiowave passive approach is proposed to be used in conjunction with radar for the investigation of the subsurface characteristics. Determination of the temperature profile and estimation of thermal flux are considered. Radar gives the possibility of deriving permittivity and reduces the surface characteristics influence on the accuracy of temperature profile estimation. Results of quantitative estimations of wavelength choice are presented. Regions with low ice content in upper surface layers must be selected for measuring of thermal heat flux. For other Martian regions with high ice content the active-passive measurements should allow derivation of the the radiophysical data map of Martian surface concerned with subsurface content of water, salinity, diurnal cycle parameters.