Day 4

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Paper title Towards the provision of operational FRM measurements for Sentinel-3 over inland water: procedures, protocols and roadmap
Authors
  1. Jean-Christophe Poisson vorteX.io Speaker
  2. Nicolas Picot CNES
  3. Hervé Yésou ICUBE-SERTIT
  4. Angelica Tarpanelli CNR-IRPI
  5. Adrien Paris HYDROMATTERS
  6. Nico Sneeuw University of Stuttgart, Institute of Geodesy
  7. Sajedeh Behnia Stuttgart University
  8. Mohammad J. Tourian University of Stuttgart
  9. Rojer Fjortoft CNES
  10. François Boy CNES
  11. Denis Blumstein CNES, LEGOS
  12. Michel Calzas DT-INSU
  13. Mathilde Cancet NOVELTIS
  14. Sylvain Lucas NOVELTIS
  15. Maxime Azzoni CNRS/Université de Strasbourg
  16. Benoit Laignel UNIROUEN
  17. Jean-François Crétaux LEGOS
  18. Stéphane Calmant IRD
  19. Karina Nielsen DTU Space, National Space Institute, Lyngby, Denmark
  20. Ole Baltazar Andersen DTU Space
  21. Lionel Fichen CNRS
  22. Mathias STUDER ICUBE-SERTIT
  23. Jerome Maxant ICUBE-SERTIT
  24. Pascal Bonnefond Observatoire de Paris
  25. Sabrine Amzil ICUBE-SERTIT
  26. Stefania Camici National Research Council (CNR)- Institute for Geo-Hydrological Protection
  27. Thomas Ledauphin ICUBE-SERTIT
  28. Nicolas Taburet CLS
  29. Maxime Vayre CLS Collecte Localisation Satellites
  30. Pierre Féménias ESA/ESRIN
Form of presentation Poster
Topics
  • A7. Hydrology and Water Cycle
    • A7.01 Inland Water Storage and Runoff: Modeling, In Situ Data and Remote Sensing
Abstract text Validation, including the determination of measurement uncertainties, is a key component of a satellite mission. Without adequate validation of the geophysical retrieval methods, processing algorithms and corrections, the computed geophysical parameters derived from satellite measurements cannot be used with confidence and the return on investment for the satellite mission is reduced. In this context, and in anticipation of the operational delivery of dedicated inland water products based on Copernicus Sentinel-3 measurements, the St3TART ESA project (Sentinel-3 Topography mission Assessment through Reference Techniques), is aimed at preparing a roadmap and providing a preliminary proof of concept for the operational provision of Fiducial Reference Measurements (FRM) in support of the validation activities of the Copernicus Sentinel-3 (S3) radar altimeter over land surfaces of interest (inland water bodies, sea ice and land ice).

In the framework of this project, the activities related to hydrology include a review of existing methodologies and associated ground instrumentation for validating and monitoring the performance and stability of the Sentinel-3 altimeter measurement via FRM. Methodologies and procedures are defined considering the errors and uncertainties coming from the point information of in-situ sensors, satellite measurements and the environment of the validation site. Based on these protocols and procedures, a roadmap is prepared in view of the operational provision of FRM to support the validation activities and foster exploitation of the Sentinel-3 SAR altimeter Land data products, over inland waters.
Then field campaign implementation and realization will be performed as a demonstrator based on the procedures and protocols defined and the roadmap.

In this ongoing project, a comprehensive review of altimeter uncertainties over inland water bodies was carried out on the basis of a literature review, leading to the identification of the different sources of error with their associated uncertainty level. A full review of all the sensors that have been used for many years for Cal/Val activities over inland waters has also been performed, combined with an analysis of innovative sensors that can fulfil the needs and potentially be used in the framework of the St3TART project. Cal/Val “super-sites” have been selected as demonstrators of the roadmap for operational FRM provision. We propose here to present the status and first results of these hydrology activities.