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| Titel |
Soil moisture monitoring with GPS reflected signals. |
| VerfasserIn |
Joël Van Baelen, Benoît Presset, Emilien Arnaudet, Laurent Morel |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250153784
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| Publikation (Nr.) |
 EGU/EGU2017-18804.pdf |
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| Zusammenfassung |
| In the context of necessary reductions of inputs in agricultural practices (fertilizers, sanitary
treatments, irrigation), monitoring of low level atmospheric water vapor and soil moisture has
become a major issue.
Nowadays, it is well known that GPS positioning with a network of receivers can also
yield estimates of tropospheric parameters which in turn provide reliable estimates of
atmospheric water vapor. Furthermore, when a dense network of GPS stations exists, GPS
signals can be used to perform tomography in order to retrieve the three dimensional
distribution of water vapour density. A more recent aspect of the GPS applications is also to
investigate the technique of reflectivity (i.e., the monitoring of ground reflected rays) to
monitor and retrieve the soil moisture variations.
In this work, we will present preliminary results of a dedicated campaign to study low
level water vapour retrieval and, more particularily, soil moisture variation identification and
estimation as demonstrated in the figure below. A strong correlation exists between soil
humidity and GPS reflected signal phase variations, while we also pursue ways
to investigate the most influential factors which help determine the most suited
satellite passage to potentially provide ways to estimate the soil moisture content
fluctuations.
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