Microwave X-Band Radiometric Characterization of Brazilian Soils by Measurement of the Complex Permittivity

摘要

The main activities and strategies in microwave radiometry are described for applications in agriculture in Brazil. Some relevant results regarding measurements of the complex permittivity (epsilon*) and estimates of emissivity for soils from tropical areas in function of soil moisture, at 10.62 GHz, are presented. Difficulties related to the measurement of epsilon* and mu* of important Brazilian soils (dielectric/ferromagnetic mixture) are highlighted.