Subsurface Soil Moisture Observation Using Software-Defined Radar Mounted on a UAV And Comparison with Numerical EM Simulations

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Abstract
Surface-to-depth profiles of soil moisture are among the most important Earth system variables due to their strong influence on the partitioning of the water cycle [1] . Yet, our directly observed knowledge of these profiles, sometimes also referred to as root-zone soil moisture (RZSM) profiles, is quite limited. Soil moisture often exhibits rapid spatial and temporal dynamics and can change significantly over a short time. For example, during the monsoon season in the US Southwest, there may be significant and sudden precipitation over localized cells.
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  • University of Southern California

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