Multitemporal RADARSAT Synthetic Aperture Radar (SAR) imagery was evaluated for monitoring soil moisture during the Southern Great Plains 1997 Hydrology Experiment (SGP97). Over the 1-month experiment a total of 10 RADARSAT (C-band; 5.3GHz; HH polarized) acquisitions were obtained. After co-registration of the images, the dependence of the backscattering coeYcient (σ°) on incidence angle (θ) was evaluated. An angular correction scheme was applied to the data and the correlation of σ° values with volumetric soil moisture measurements was determined. A high positive correlation between the two was observed for wheat stubble fields, whereas no correlation could be observed for pasture ? elds. A change detection approach yielded a correlation of soil moisture changes to s� changes for wheat stubble ? elds, indicating the potential of this method for soil moisture monitoring.
All Science Journal Classification (ASJC) codes
- Earth and Planetary Sciences(all)