Soil moisture monotorization using GNSS reflected signals
- Autores: Alejandro Egido, Giulio Ruffini, Marco Caparrini, Cristina Martin, Esteba Farrés, Xavier Banqué
- Localización: Revista del Instituto de Navegación de España: publicación técnica cuatrimestral de navegación marítima, aérea, espacial y terrestre, ISSN-e 1578-6064, Nº. 31, 2008, págs. 16-23
- Idioma: español
- Texto completo no disponible (Saber más ...)
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Resumen
The use of GNSS signals as a source of opportunity for remote sensing applications has been a research area of great interest since 1993, when M. Martín Neira (ESA) proposed that GPS signals reflected from the earth's surface could be detected to retrieve ocean altimetry information accounting for the existent delay between the direct and the reflected signals(the PARIS concept PAssive Reflectometry and Interferometry System). Since then, several applications based on a GNSS bistatic radar configuration have been developed taking advantage of the high availability and stability of GNSS signals. This technique is commonly know as GNSS-R (Global Navigation Satellite System-Reflections).
GNSS-R studies and investigations have been mainly focused on sea surface topography. Within this frame, Starlab Barcelona has developed Oceanpal, a fully operational system that can provide GNSS-R data and higher level products, such as real time significant wawe height (SWH) and altimetry data.
The application of GNSS-R to land remote sensing has been largely overlooked. Nevertheless, there is experimental evidenca that GPS reflected signals from the ground can be detected and processed in order obtain soil moisture estimates.
