Premium
Sentinel‐3A Views Ocean Variability More Accurately at Finer Resolution
Author(s) -
Heslop E. E.,
SánchezRomán A.,
Pascual A.,
Rodríguez D.,
Reeve K. A.,
Faugère Y.,
Raynal M.
Publication year - 2017
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 - 10.1002/2017gl076244
Subject(s) - altimeter , glider , synthetic aperture radar , remote sensing , geology , radar , mode (computer interface) , scale (ratio) , meteorology , environmental science , computer science , geography , telecommunications , cartography , programming language , operating system
This is the first multiplatform evaluation involving data from the new Sentinel‐3A altimeter. An experiment was undertaken in the Algerian Basin, employing an ocean glider and a ship mission, along the same track and synchronous with an overpass of the Sentinel‐3A mission. This provided three independent views of the ocean velocity field, along a section that encompassed three different oceanographic regimes. The results demonstrate the capacity of Sentinel‐3A to retrieve fine‐scale oceanographic features (~20 km). The intercomparison with in situ platforms showed a significant improvement, order 30% in resolution and 42% in velocity accuracy using a synthetic aperture radar mode with respect to lower‐resolution mode of conventional altimetry. In addition, the three‐platform view provided valuable insight into the variability of evolving oceanographic features, in an area of the Mediterranean that remains chronically under sampled.