SEASTARex: Technical Assistance to Earth Explorer 11 SEASTAR Phase 0 campaign. Final Report.

McCann, David L. ORCID: https://orcid.org/0000-0003-4428-700X; Martin, Adrien C.H.; Macedo, Karlus; Alvarez, Ruben Carrasco; Horstmann, Jochen; Marié, Louis; Márquez-Martinez, José; Portabella, Marcos; Lin, Wenming; Grieco, Guiseppe; Duarte, Rui; Filipot, Jean Francois; Meta, Adriano; Gommenginger, Christine ORCID: https://orcid.org/0000-0002-6941-1671; Martin-Iglesias, Petronilo; Casal, Tania. 2024 SEASTARex: Technical Assistance to Earth Explorer 11 SEASTAR Phase 0 campaign. Final Report. National Oceanography Centre.

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Abstract/Summary

SEASTARex is an airborne and ground truth scientific campaign to support the SeaSTAR phase 0 candidature for ESA’s Earth Explorer 11. Deploying the Ocean Surface Current Airborne Radar (OSCAR) airborne SAR instrument, this scientific campaign represents the first of a SAR instrument of its configuration and the first simultaneous retrieval of total surface current vectors (TSCV) and ocean surface vector winds (OSVW) from interferometric SAR data. A first campaign was conducted in the Iroise Sea with a wide range of ground truth measurements deployed (HF radar, mooring, X-band marine radar, stereo camera), tasked SAR images, in addition to high-resolution and mature numerical models to simulate ocean waves and current. This campaign consists of three sites: a site over the Ouessant island characterized by strong tidal current gradients, a homogeneous site South of the island where the mooring was deployed and a third area offshore in the Bay of Biscay parallel to an ASCAT pass. The campaign acquired data over four days (17, 22, 25, 26 May 2022). Comparison between OSCAR derived Total Surface Current Vectors and ground truth measurements give correlation and RMSE of 0.08m/s and 8.5° in velocity and direction respectively. These first results have been added to the EE11 SeaSTAR Report for Assessement (ESA, 2023) and a paper was submitted (McCann et al., 2023). Based on this success and on the unique opportunity to fly simultaneously with NASA/CNES SWOT (Surface Water and Ocean Topography) satellite mission during its daily CalVal repeat phase and a wide range of in situ measurements (e.g. BioSWOT-Med) all relevant to OSCAR and SeaSTAR, a second OSCAR airborne campaign was then planned. This campaign was executed in May 2023 and consisted of three acquisition days (5, 7, 8 May 2023) with a rose pattern centered over the left SWOT sub-swath at (41.09°N, 4.29°W) generating a disk of about 40km diameter. Acquired data during this Med Sea campaign are not analyzed in the frame of this project, but the analysis was supported through a CNES contract and preliminary results are integrated in the EE11 SeaSTAR Assessment Report (ESA, 2023)

Item Type:	Publication - Report (Project Report)
Digital Object Identifier (DOI):	10.57780/esa-633ce94
Additional Keywords:	Doppler oceanography, scatterometry, ocean surface current, ocean surface wind
Related URLs:	Project Website
Date made live:	11 Mar 2025 15:15 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/539071

Item Type:

Publication - Report (Project Report)

Digital Object Identifier (DOI):

10.57780/esa-633ce94

Additional Keywords:

Doppler oceanography, scatterometry, ocean surface current, ocean surface wind

Related URLs: