Abstract
We report the retrieval of sea surface directional mean square slope from Global Navigation Satellite System Reflections (GNSS‐R) Delay‐Doppler‐Map (DDM) data collected during an experimental flight at 1 km altitude. We emphasize the utilization of the entire DDM to more precisely infer ocean roughness directional parameters, and argue that the DDM exhibits the impact of both roughness and scatterer velocity. Obtained estimates are analyzed and compared with Jason‐1 measurements, ECMWF numerical weather model outputs and optical data.
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