Title :
A simulator for GNSS-R polarimetric observations over the ocean
Author :
Schiavulli, Domenico ; Ghavidel, Ali ; Camps, Adriano ; Migliaccio, Maurizio
Author_Institution :
Dipt. di Sci. e Tecnol., Univ. of Napoli Parthenope, Naples, Italy
Abstract :
Global Navigation Satellite Systems - Reflectometry (GNSS-R) represents an innovative tool for remote sensing. In this paper a facet-based simulator is presented to investigate the polarimetric characteristics of GNSS L-band signals reflected off sea surface. The aim of the proposed technique is to improve the classical simulation technique based on the Zavorotny-Voronovich (Z-V) approach. Therefore, the scattered power and the Delay-Doppler Map are obtained using a time-evolving random 3D sea surface and the Kirchhoff Approximation (KA) of the Physical Optics (PO) to describe the scattering mechanisms. Finally the polarization ratio (PR) between co- and cross-polar scattered signal is fully investigated against different sea surface conditions, i.e. wind speed.
Keywords :
Doppler radar; oceanographic techniques; radar polarimetry; remote sensing by radar; wind; GNSS L-band signals; GNSS-R polarimetric observations; Kirchhoff approximation; Zavorotny-Voronovich approach; cross-polar scattered signal; delay-Doppler map; facet-based simulator; global navigation satellite systems-reflectometry; physical optics; polarization ratio; remote sensing; scattering mechanisms; sea surface conditions; time-evolving random 3-D sea surface; wind speed; Global Positioning System; Remote sensing; Scattering; Sea surface; Surface waves; Wind speed; Bistatic Radar; Facet Approach; GNSS-R; Polarization; Remote Sensing;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6947312
