Study on the backscattering characteristic of typical earth substances in northwest of Chaina

The S-band and C-band FM-CW land-based radar scatterometers were used to measure the backscattering coefficient of a variety of typical earth substances in northwest of China, including: bare soil, frozen soil, bulrush and maize etc. under the different time and different wave band and different polarized condition. First of all, the measurement principle and performance parameters of scatterometer were introduced, the detailed experimental plans and measurements specifications were developed. Based on them, the various units of measurement were completed successfully. The measurement process of scatterometer was briefly introduced in this work. according to different scattering mechanisms, features are divided into two categories: surface scattering and volume scattering, and analyzed these Scattering Characteristics and the reasons for these differences; combining with the corresponding earth substances scattering model, quantitative studying a function between the backscattering coefficient and surface parameters, getting different surface parameters of features by inversion, and analysis of a variety of influencing factors by comparing the measured datas.