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\begin{document}

\title{Sentinel-3 SLSTR SST Validation using a Fiducial Reference Measurements
(FRM) Service}



\author[1]{Werenfrid Wimmer}%
\author[2]{Time Nightingale}%
\author[3]{Jacob Hoyer}%
\author[4]{Hugh Kelliher}%
\author[4]{Ruth Wilson}%
\author[5]{Jean-François Piollé}%
\author[6]{Silvia Scifoni}%
\author[6]{Steffen Dransfeld}%
\author[7]{Craig Donlon}%
\affil[1]{National Oceanography Centre}%
\affil[2]{Rutherford Appleton Laboratory}%
\affil[3]{Danish Meteorological Institute}%
\affil[4]{Space Connexion}%
\affil[5]{IFREMER}%
\affil[6]{ESA}%
\affil[7]{European Space Agency}%


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  \date{May 19, 2024}


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\begin{abstract}
ESA is building on almost 15 years of continuous Fiducial Reference
Measurements (FRM) from UK-funded shipborne radiometers by establishing
a service to provide historic and ongoing FRM measurements to the wider
SST community through an International SST FRM Radiometer Network
(ships4sst). The ships4sst is open for partners around the world,
currently compromising of partners from the UK (University of
Southampton, Rutherford Appleton Laboratory, Space ConneXions), Denmark
(Danish Meteorological Institute) and France (Ifremer) and will not only
collect Shipborne radiometer data but also use the data to validate
SLSTR and other satellite SST products with the Felyx MDB tool. Included
in the service is a long term data archive of the FRM datasets at
Ifremer where the data will be stored in the ships4sst netCDF L2R
format. We will show examples of the ships4sst data and demonstrate its
use with the newest SLSTR validation results from the ships4sst network
regions, showing that SLSTR performs at least as well as its predecessor
AATSR. We will also show results of the SLSTR A and B units during the
Sentinel-3 tandem phase in 2018 by using triple collocations on the
ships4sst FRM data and the SLSTR units on Sentinel 3 A and B.%
\end{abstract}%



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