NDLI: Detection of soil moisture content changes by using a single geodetic antenna: The case of an agricultural plot

Content Provider	IEEE Xplore Digital Library
Author	Roussel, N. Frappart, F. Ramillien, G. Darrozes, J. Baup, F. Ha, C.
Copyright Year	2015
Description	Author affiliation: GET-OMP, GRGS, Toulouse, France (Ramillien, G.) \|\| Univ. Paul Sabatier, Toulouse, France (Roussel, N.; Frappart, F.; Darrozes, J.; Baup, F.; Ha, C.)
Abstract	As multipaths still represent a major problem for reaching precise GNSS positioning, the mitigation of their influence has been widely investigated. However, previous studies have lately proposed to use these interferences of GNSS electromagnetic waves to estimate parameters related to the reflecting surface (e.g., antenna heights, rugosity,...). Variations of the nature of the surface is likely to modify the properties of the reflected waves, and consequently lead to variations of amplitude / phase of the signal-to-noise ratio (SNR), e.g. recorded at 1 Hz by a GNSS receiver. By analyzing the time variations of SNR measurements linked to the dielectric constant of the surrounding soil, we use a method to recover the local fluctuations of the soil moisture content. It is simply based on the obvious linear correlation between SNR amplitude / phase and retrieved antenna height time series and independent measurements of humidity probe at 2 and 5 cm depths. This method of combination is applied to determine soil moisture in a corn and soya field at Lamasquère, France, for 21 successive days. Results show a good correlation (e.g. 0.96 with GPS PRN-01 satellite) between SNR inversion and humidity probes for most satellites.
Starting Page	2008
Ending Page	2011
File Size	2951819
Page Count	4
File Format	PDF
e-ISBN	9781479979295
DOI	10.1109/IGARSS.2015.7326192
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Global Positioning System Signal to noise ratio Satellites Soil moisture Probes Receivers Correlation SNR GNSS-R soil moisture remote sensing IPT
Content Type	Text
Resource Type	Article

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