Comparison of Three in Situ Surface Soil Moisture Measurements and Application to C Band Scatterometer Calibration

摘要

Surface gamma neutron probe, tensiometer and dielectric constant probe surface moisture measurements were compared to gravimetric sampling and C band scatterometer measurements, in order to find a system for ground truths during air or satellite-borne soil moisture experiments. Results for the three techniques are similar, but the dielectric probe is entirely automatic. Radar data calibrated with gravimetric sampling are comparable with dielectric measurements.