DUAL FREQUENCY MICROWAVE RADIOMETER MEASUREMENT OF SOIL MOISTURE FOR AND VEGETATED ROUGH SURFACES

摘要

A series of controlled ground-based passive microwave radiometric measurements on soil moisture were conducted to determine the effects of terrain surface roughness and vegetation on microwave emission. A review was given to some apparent temperature models for bare and vegetated rough surfaces and theoretical predictions were made using Sibley's apparent temperature models for bare and vegetated smooth surfaces. The theoretical predictions were compared with the experimental results and with some recent airborne radiometric measurements on soil moisture. The relationship of soil moisture to the permittivity for the soil of this experiment was obtained in the laboratory.