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The Eddy Experiment: GNSS‐R speculometry for directional sea‐roughness retrieval from low altitude aircraft
Author(s) -
Germain O.,
Ruffini G.,
Soulat F.,
Caparrini M.,
Chapron B.,
Silvestrin P.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020991
Subject(s) - gnss applications , remote sensing , altitude (triangle) , satellite , satellite system , geodesy , doppler effect , geology , surface roughness , meteorology , surface finish , environmental science , sea surface height , altimeter , aerospace engineering , physics , geometry , mathematics , quantum mechanics , astronomy , engineering , materials science , composite material
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.