Design and experiments of GNSS-R receiver system for remote sensing

Earth-Reflected GNSS (Global Navigation Satellite Systems) signals have become an attractive tool for remote sensing. This brings out the need of signal receiver systems to process this kind of signals. This paper describes the architecture and signal processing issues of a new GNSS-R receiver system (GRrSv.2) that features enhanced capabilities for remote sensing based on reflected Global Positioning System (GPS) signals. The GRrSv.2 can process both GPS L1-C/A direct signals and reflections. Aircraft and land based verification experiments for both ocean and land reflections have been performed and some primary results are presented in this paper.