For the analysis of sea surface using Global Navigation Satellite System-Reflectometry (GNSS-R), Geometrical Optics (GO) is typically adopted for modeling scattering around the specular reflection direction, where conventional GNSS-R receivers operate. However, the exploitation of GNSS-R for maritime surveillance applications, e.g., ship detection, is feasible in far-from-specular acquisition geometries, where the validity of GO is questionable. In this paper, we present the results of a link budget analysis for the sea surface return in arbitrary viewing geometries. The study is aimed at comparing GO with a more accurate closed-form bistatic two-scale model, named BA-PTSM, for the simulation of GNSS-R signals in acquisition geometries other than the conventional forward-scattering one. Numerical results show that a reliable simulation of airborne GNSS-R signals in far-from-specular acquisition geometries requires sea surface scattering models more accurate than GO, e.g., BA-PTSM.

Link Budget Analysis for the Modeling of GNSS-R Sea Surface Returns in Far-from-Specular Acquisition Geometries / DI Martino, G.; DI Simone, A.; Franceschetti, G.; Iodice, A.; Riccio, D.; Ruello, G.. - (2021), pp. 1-4. (Intervento presentato al convegno 34th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2021 tenutosi a ita nel 2021) [10.23919/URSIGASS51995.2021.9560646].

Link Budget Analysis for the Modeling of GNSS-R Sea Surface Returns in Far-from-Specular Acquisition Geometries

DI Martino G.;DI Simone A.;Franceschetti G.;Iodice A.;Riccio D.;Ruello G.
2021

Abstract

For the analysis of sea surface using Global Navigation Satellite System-Reflectometry (GNSS-R), Geometrical Optics (GO) is typically adopted for modeling scattering around the specular reflection direction, where conventional GNSS-R receivers operate. However, the exploitation of GNSS-R for maritime surveillance applications, e.g., ship detection, is feasible in far-from-specular acquisition geometries, where the validity of GO is questionable. In this paper, we present the results of a link budget analysis for the sea surface return in arbitrary viewing geometries. The study is aimed at comparing GO with a more accurate closed-form bistatic two-scale model, named BA-PTSM, for the simulation of GNSS-R signals in acquisition geometries other than the conventional forward-scattering one. Numerical results show that a reliable simulation of airborne GNSS-R signals in far-from-specular acquisition geometries requires sea surface scattering models more accurate than GO, e.g., BA-PTSM.
2021
Link Budget Analysis for the Modeling of GNSS-R Sea Surface Returns in Far-from-Specular Acquisition Geometries / DI Martino, G.; DI Simone, A.; Franceschetti, G.; Iodice, A.; Riccio, D.; Ruello, G.. - (2021), pp. 1-4. (Intervento presentato al convegno 34th General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2021 tenutosi a ita nel 2021) [10.23919/URSIGASS51995.2021.9560646].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/915121
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