Observing Sea Surface Current by Gaofen-3 Satellite Along-Track Interferometric SAR Experimental Mode

Sea surface current is a research hotspot in oceanography. Space-borne along-track interferometric synthetic aperture radar (along-track InSAR, ATI) promising sensor for measuring high-resolution sea field, and there no operational system orbit yet. To support future space-borne ATI systems, based on the experimental mode of Gaofen-3 (GF-3) satellite, first observing experiment was conducted Jiaozhou Gulf China, 2019. Meanwhile, SAR observations situ instrument measurements are obtained experiments. The data preprocessed by processor specially developed GF-3 data. Then, extracted M4S mode. retrieved compared with ground-based high frequency wave results show that root mean square error observed satellite less than 0.2 m/s.