GAMMA RAY DATA: PECK (FIFE)Entry ID: FIFE_PECK_GAM
Abstract: Airborne soil moisture measurement is based on the difference between natural terrestrial gamma radiation flux measured for comparatively wet and dry soils. The presence of moisture in the soil causes an effective increase in the soil density resulting in an increased attenuation of the gamma flux for relatively wet soil and a correspondingly lower flux at the ground surface. As part of the FIFE ... experiment, natural terrestrial gamma radiation data over a network of 24 flight lines were collected. The data acquisition procedure was designed to accumulate and store spectral radiation data along a flight line from which estimates of soil moisture could be computed. Ground-based soil moisture measurements were used to make a one-time calibration of the natural terrestrial radioisotope signal over the flight line network. A time-series of airborne soil moisture measurements (to a depth of 20 cm) was compared to an extensive, independent data set of ground-based soil moisture measurements. Estimates for flight line segments were found to have an average RMS error of approximately 2.5 % soil moisture (Peck et al., 1990).
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Data Set Citation
Dataset Originator/Creator: CARROLL, T.R.PECK, E.L.
Dataset Title: GAMMA RAY DATA: PECK (FIFE)
Dataset Release Date: 1994
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/37Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=37&term2attribute...
Start Date: 1987-06-03Stop Date: 1989-08-10
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Creation and Review Dates
Last DIF Revision Date: 2013-01-24