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Main Title: First evidence of mesoscale ocean eddies signature in GNSS reflectometry measurements
Author(s): Hoseini, Mostafa
Asgarimehr, Milad
Zavorotny, Valery
Nahavandchi, Hossein
Ruf, Chris
Wickert, Jens
Type: Article
Language Code: en
Abstract: Feasibility of sensing mesoscale ocean eddies using spaceborne Global Navigation Satellite Systems-Reflectometry (GNSS-R) measurements is demonstrated for the first time. Measurements of Cyclone GNSS (CYGNSS) satellite missions over the eddies, documented in the Aviso eddy trajectory atlas, are studied. The investigation reports on the evidence of normalized bistatic radar cross section ( σ0 ) responses over the center or the edges of the eddies. A statistical analysis using profiles over eddies in 2017 is carried out. The potential contributing factors leaving the signature in the measurements are discussed. The analysis of GNSS-R observations collocated with ancillary data from the European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis-5 (ERA-5) shows strong inverse correlations of σ0 with the sensible heat flux and surface stress in certain conditions.
Issue Date: 6-Feb-2020
Date Available: 9-Mar-2020
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
551 Geologie, Hydrologie, Meteorologie
Subject(s): GNSS Reflectometry
Mesoscale ocean eddies
Bistatic Radar Cross Section
Journal Title: Remote Sensing
Publisher: MDPI
Publisher Place: Basel
Volume: 12
Issue: 3
Article Number: 542
Publisher DOI: 10.3390/rs12030542
EISSN: 2072-4292
Appears in Collections:FG GNSS-Fernerkundung, Navigation und Positionierung » Publications

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