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Cross-correlation waveform analysis for conventional and interferometric GNSS-R approaches
Martín Alemany, Francisco; Camps Carmona, Adriano José; Hyuk, Park; d'Addio, Salvatore; Martín Neira, Manuel; Pascual Biosca, Daniel
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
Reflectometry using Global Navigation Satellite System (GNSS-R) signals has become an attractive tool for Earth remote sensing. Back to 1993, it was proposed as an alternative to the conventional spaceborne ocean altimetry to estimate the sea surface height over a large field-of-view. After Doppler compensation, the cross-correlation of the received scattered signal with either a locally generated replica [conventional GNSS-R (cGNSS-R)] or either the direct signal (interferometric GNSS-R (iGNSS-R)] is called the waveform. This paper provides a critical review of the cross-correlation waveform model, addressing issues such as the correlation characteristics, the bandwidth, the observation geometry, and the thermal and speckle noises. It provides a comprehensive and systematic overview of the impact of all these effects on the GNSS-R observables, which is important to properly define future GNSS-R instrument and mission concepts.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia
Global Positioning System
Oceans and seas
Altitudes--Measurement
Global Navigation Satellite System reflectometry (GNSS-R)
Ocean altimetry
Speckle noise
Thermal noise
Woodward ambiguity function (WAF)
GPS Signals
Ocean
Altimetry
GNSS (Sistema de navegació)
Oceanografia
Altituds -- Mesurament
info:eu-repo/semantics/publishedVersion
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