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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The error between actual (using the ultrasonic sensor) and calculated (using the VWC data from the MCP processed using the tangent model) water depth from 3 additional independent MCPs. Probes 1 and 2 are 12-sensor probes, and probe 3 is an 8-sensor probe.