Retrieving method of multi ocean wave parameters based on GNSS-R technique

Aiming at the limitation that GNSS-R technique only estimates significant wave height using Global Navigation Satellite System (GNSS) reflections, a mapping model of ocean surface coherence time and significant wave height and mean wave period is established in this paper, which is based on interferometric complex field (ICF) defined by direct and reflected signals. The processing flow and method of reflection signals assisted with Doppler shift, C/A code and navigation data bits of direct signals are also given in detail. The model and algorithms of retrieving wave direction and wave period using reflections is researched, and then the multi-parameter retrieving model and algorithm is established. Finally, an experiment campaign is carried out to validate the results, the location of which is Xiaomaidao ocean observation station, Qingdao. The experiment results prove that the root-mean-square errors of significant wave height and mean wave period are 0.1 m and 0.61 s, respectively. The research results of this project would have significant academic value and important strategic significance for new technology research and new equipment manufacture of ocean monitoring, the applications to Beidou Navigation Satellite System and other application fields.