Experimental study for GNSS-R polarimetry

GNSS reflectometry (GNSS-R) is a remote sensing methodology in which the GNSS satellites are applied for signal transmitters. In GNSS-R studies, an interference strategy is popular. The interference method uses interactions between direct signals from the GNSS satellites and reflected signals by sensing targets. This paper explains for principles and advantages in using the interference method. "The soil" is focused on as a main sensing object in this study. Features of soil consist of many parameters such as soil moisture, vegetation, surface roughness, etc. This study discusses sensing these soil parameters. Then, it is reported about the experiments by the interference method for verifying feasibility of this method. Based on the results of the experiments, future works are indicated for improving the measurement by the interference method and realizing another method which can be implemented without signal interference.