TY - GEN
T1 - GNSS Reflectometry Systems for soil permittivity determination
AU - Savi, Patrizia
AU - Bertoldo, Silvano
AU - Milani, Albert
N1 - Publisher Copyright:
© 2019 European Association on Antennas and Propagation.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019/3
Y1 - 2019/3
N2 - Global Navigation Satellite System Reflectometry (GNSS-R) can be successfully used to obtain information about the composition or the properties of ground surfaces, by analyzing GPS signals reflected by the ground. The received power of these signals is proportional to the moduli of the perpendicular and parallel polarization Fresnel coefficients, which in turn depend on the incidence angle and the ground's permittivity, a parameter related to the ground surface's physical properties. The goal is then to obtain the value of permittivity from the known value of the angle of incidence and the values of the Fresnel reflection coefficients, as measured by an automatic GNSS-R system. In general, the permittivity is a complex number: in some cases (e.g. for non-dispersive soils), its imaginary part can be neglected, and the permittivity can be assumed to be a real number. In this case, it is possible to solve the Fresnel reflection coefficients explicitly in terms of the permittivity. The corresponding solution formulas can then be used also to verify the validity of other empirical methods of determination of the permittivity. In this work, we present these formulas, and present a set of their verification, against know values of the permittivity obtained by independent measurements.
AB - Global Navigation Satellite System Reflectometry (GNSS-R) can be successfully used to obtain information about the composition or the properties of ground surfaces, by analyzing GPS signals reflected by the ground. The received power of these signals is proportional to the moduli of the perpendicular and parallel polarization Fresnel coefficients, which in turn depend on the incidence angle and the ground's permittivity, a parameter related to the ground surface's physical properties. The goal is then to obtain the value of permittivity from the known value of the angle of incidence and the values of the Fresnel reflection coefficients, as measured by an automatic GNSS-R system. In general, the permittivity is a complex number: in some cases (e.g. for non-dispersive soils), its imaginary part can be neglected, and the permittivity can be assumed to be a real number. In this case, it is possible to solve the Fresnel reflection coefficients explicitly in terms of the permittivity. The corresponding solution formulas can then be used also to verify the validity of other empirical methods of determination of the permittivity. In this work, we present these formulas, and present a set of their verification, against know values of the permittivity obtained by independent measurements.
UR - http://www.scopus.com/inward/record.url?scp=85068485492&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068485492&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85068485492
T3 - 13th European Conference on Antennas and Propagation, EuCAP 2019
BT - 13th European Conference on Antennas and Propagation, EuCAP 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th European Conference on Antennas and Propagation, EuCAP 2019
Y2 - 31 March 2019 through 5 April 2019
ER -