Statistics – Applications
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3524405l&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 24, CiteID L24405
Statistics
Applications
15
Hydrology: Soil Moisture, Hydrology: Instruments And Techniques: Monitoring, Geodesy And Gravity: Instruments And Techniques, Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240)
Scientific paper
Measurements of soil moisture, both its global distribution and temporal variations, are required to study the water and carbon cycles. A global network of in situ soil moisture stations is needed to supplement datasets from satellite sensors. We demonstrate that signals routinely recorded by Global Positioning System (GPS) receivers for precise positioning applications can also be related to surface soil moisture variations. Over a three month interval, GPS-derived estimates from a 300 m2 area closely match soil moisture fluctuations in the top 5 cm of soil measured with conventional sensors, including the rate and amount of drying following six precipitation events. Thousands of GPS receivers that exist worldwide could be used to estimate soil moisture in near real-time, with L-band signals that complement future satellite missions.
Bilich Andria L.
Braun John J.
Gutmann Ethan D.
Larson Kristine M.
Small Emma E.
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