BBAuthors: Caldwell, T.G.; Advisor: -; Participants: Bongiovanni, T.; Cosh, M.H.; Jackson, T.J.; Colliander, A.; Abolt, C.J.; Casteel, R.; Larson, T.; Scanlon, B.R.; Young, M.H. (2019)
The spatiotemporal variability of soil water content (SWC) at the remote sensing scale requires dense monitoring for calibration and validation. Here, we present an overview of the Texas Soil Observation Network (TxSON), an intensively monitored area in the semiarid rangelands of the central Texas Hill Country. TxSON is a dense network consisting of 40 in situ locations nested at 36, 9, and 3 km within the Equal‐Area Scalable Earth Grid and serves as a Core Calibration and Validation Site for NASA's Soil Moisture Active Passive mission. The 4‐yr dataset consists of hourly SWC measured at 5, 10, 20, and 50 cm. The SWC data are upscaled using arithmetic, Voronoi, and inverse distance we... 
