Quality Assessment of Altimetry Water Surface Height Measurements for inland waters

Lionel Zawadzki (CLS, France)

CoAuthors

Nicolas Taburet (CLS, France); Adrien Paris (CLS, France); Maxime Vayre (CLS, France); Rémi Jugier (CLS, France); Matthias Raynal (CLS, France); Denis Blumstein (LEGOS/CNES, France); Sophie Le Gac (CNES, France); Jean-François Crétaux (LEGOS/CNES, France); Nicolas Picot (CNES, France)

Event: 2018 Ocean Surface Topography Science Team Meeting

Session: Regional and Global CAL/VAL for Assembling a Climate Data Record

Presentation type: Type Oral

With the increasing demography, inland water is a more and more pressured resource for the population needs as well as a societal risk for local populations. It is also a fundamental element for industry and agriculture, therefore becoming an economic and political stake. Rivers and lakes monitoring is thus indispensable but remains a challenge because of the limited accessibility to upstream regions, the scarce repartition of in situ gauges and the limited dissemination of their measurements.
The altimetry constellation allows a massive live and historical access to a wide network of information over lakes as well as over virtual stations sampling various rivers of hydrological basins. The altimetry missions currently used in the water level monitoring services (THEIA/Hydroweb, DAHITI, G-REALM, Copernicus Global Land, Copernicus Climate Change …etc) are Jason-3, Sentinel-3a and soon Sentinel-3b.
The quality assessment of Jason-3, Sentinel-3a and Sentinel-3b land products from level 2 to level 3 is essential to ensure the reliability of these services. In this study, we propose a set of diagnoses to monitor the quality of altimetry measurements at global and basin scale. These diagnoses are applied to the current altimetry land products, including a specific focus on the Sentinel-3a/Sentinel-3b tandem phase.

 

Oral presentation show times:

Room Start Date End Date
Teatro Auditorium Fri, Sep 28 2018,12:00 Fri, Sep 28 2018,12:15
Lionel Zawadzki
CLS
France
lzawadzki@cls.fr