Pierre Prandi
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View article: Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altimeter Combination System (DUACS)
Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altimeter Combination System (DUACS) Open
The Surface Water and Ocean Topography (SWOT) mission delivers unprecedented swath-altimetry products. Despite SWOT's 2D coverage and precision, its Level-2 ocean products suffer from the same limitations as their counterparts from nadir a…
View article: Data-Driven Calibration of SWOT’s Systematic Errors: First In-Flight Assessment
Data-Driven Calibration of SWOT’s Systematic Errors: First In-Flight Assessment Open
The SWOT satellite, carrying the KaRIN first wide-swath onboard altimeter, was launched in December 2022, and has now delivered more than a year of surface water elevation data over the ocean and inland lakes/rivers. These data are affecte…
View article: Blending 2D topography images from SWOT into the altimeter constellation with the Level-3 multi-mission DUACS system
Blending 2D topography images from SWOT into the altimeter constellation with the Level-3 multi-mission DUACS system Open
The Surface Water and Ocean Topography (SWOT) mission delivers unprecedented swath altimetry products. Despite SWOT’s 2D coverage and precision, its Level-2 products suffer from the same limitations as their counterparts from nadir altimet…
View article: Improvement of global and regional mean sea level estimation from satellite altimetry
Improvement of global and regional mean sea level estimation from satellite altimetry Open
The accurate measurement of the global mean sea level (GMSL) record and of the estimation of GMSL’s trend and acceleration are key goals of high precision satellite altimetry. These measurements are indeed crucial to tackle important…
View article: Overview of SWOT ocean surface topography performance 
Overview of SWOT ocean surface topography performance  Open
The SWOT mission was launched in December 2022. Its first of a kind KaRIn instruments provides two dimensionnal images of ocean surface topography over a 120 km wide swath. Ocean surface topography data quality and mission performance have…
View article:  Reconstructing the 2003-2022 Sea Level Anomalies field in ice-covered regions of the Southern Ocean
 Reconstructing the 2003-2022 Sea Level Anomalies field in ice-covered regions of the Southern Ocean Open
Despite its pivotal role in the climate system, subpolar circulation in the Southern Ocean remains poorly observed, primarily owing to the physical limitations of conventional satellite altimetry in ice-covered regions. However, recent pro…
View article: SWOT Level-3 Overview algorithms and examples
SWOT Level-3 Overview algorithms and examples Open
The Surface Water Ocean Topography (SWOT) mission was launched in December 2023.It is the result of cooperation between CNES, NASA and their partners from the Canadian and UK Space Agencies. SWOT carries a unique altimetric payload, includ…
View article: How accurate is accurate enough for measuring sea-level rise and variability
How accurate is accurate enough for measuring sea-level rise and variability Open
View article: Current observed global mean sea level rise and acceleration estimated from satellite altimetry and the associated measurement uncertainty
Current observed global mean sea level rise and acceleration estimated from satellite altimetry and the associated measurement uncertainty Open
We present the latest release of the global mean sea level (GMSL) record produced by the French space agency Centre National d’Etudes Spatiales (CNES) and distributed on the AVISO+ website. This dataset is based on reprocessed along-track …
View article: Southern Ocean Ice‐Covered Eddy Properties From Satellite Altimetry
Southern Ocean Ice‐Covered Eddy Properties From Satellite Altimetry Open
We investigate statistical properties of surface currents as well as coherent mesoscale eddies in the seasonally ice‐covered Southern Ocean. Based on a recent regional Sea Level Anomaly satellite altimetry data set, we compute Eddy Kinetic…
View article: Ocean Circulation from Space
Ocean Circulation from Space Open
View article: Sea level maps of the Arctic (and southern) ocean from satellite altimetry from 2011 to 202
Sea level maps of the Arctic (and southern) ocean from satellite altimetry from 2011 to 202 Open
In the polar regions satellite sea level observations are limited by the sea ice. Thanks to a dedicated processing, sea level can however be estimated within fractures in the ice (leads) enabling to produce continuous sea level maps includ…
View article: Refining the Resolution of DUACS Along-Track Level-3 Sea Level Altimetry Products
Refining the Resolution of DUACS Along-Track Level-3 Sea Level Altimetry Products Open
This paper describes the demonstration of a regional high-resolution level-3 (L3) altimeter data unification and altimeter combination system (DUACS) developed with support from the French space agency (CNES). Deduced from full-rate (20 Hz…
View article: Improved global sea surface height and current maps from remote sensing and in situ observations
Improved global sea surface height and current maps from remote sensing and in situ observations Open
We present a new gridded sea surface height and current dataset produced by combining observations from nadir altimeters and drifting buoys. This product is based on a multiscale and multivariate mapping approach that offers the possibilit…
View article: Comment on essd-2022-181
Comment on essd-2022-181 Open
Abstract. We present a new gridded sea surface height and current dataset produced by combining observations from nadir altimeters and drifting buoys. This product is based on a multiscale & multivariate mapping approach t…
View article: Comment on essd-2022-181
Comment on essd-2022-181 Open
Abstract. We present a new gridded sea surface height and current dataset produced by combining observations from nadir altimeters and drifting buoys. This product is based on a multiscale and multivariate mapping approach…
View article: Refining the resolution of DUACS along track (level 3) altimeter Sea Level products
Refining the resolution of DUACS along track (level 3) altimeter Sea Level products Open
This paper describes a high-resolution Level-3 (L3) altimeter Data Unification and Altimeter Combination System (DUACS) experimental regional product developed with support from the French space agency (CNES). Deduced from full rate (20 Hz…
View article: Improved global sea surface height and currents maps from remote sensing and in situ observations
Improved global sea surface height and currents maps from remote sensing and in situ observations Open
We present a new gridded sea surface height and current dataset produced by combining observations from nadir altimeters and drifting buoys. This product is based on a multiscale & multivariate mapping approach that offers the possibil…
View article: Current observed global mean sea level rise and acceleration estimated from satellite altimetry and the associated uncertainty
Current observed global mean sea level rise and acceleration estimated from satellite altimetry and the associated uncertainty Open
We present the latest released of the Global Mean Sea Level (GMSL) record produced by the French space agency CNES and distributed on the AVISO+ website. This dataset is based on reprocessed along-track data, so-called L2P 21, of the refer…
View article: Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi‐Mission Satellite Altimetry
Subpolar Southern Ocean Seasonal Variability of the Geostrophic Circulation From Multi‐Mission Satellite Altimetry Open
A novel multi‐satellite product is used to shed light on the sea surface height seasonal cycle and associated geostrophic circulation in the subpolar Southern Ocean. We find three main modes of variability governing the Sea Level Anomaly s…
View article: Southern ocean sea level anomaly in the sea ice-covered sector from multimission satellite observations
Southern ocean sea level anomaly in the sea ice-covered sector from multimission satellite observations Open
View article: Arctic sea surface height maps from multi-altimeter combination
Arctic sea surface height maps from multi-altimeter combination Open
We present a new Arctic sea level anomaly dataset based on the combination of three altimeter missions using an optimal interpolation scheme. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended together, providing an unpr…
View article: Comment on essd-2021-123
Comment on essd-2021-123 Open
Abstract. We present a new Arctic sea level anomaly dataset based on the combination of three altimeter missions using an optimal interpolation scheme. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended …
View article: Comment on essd-2021-123
Comment on essd-2021-123 Open
Abstract. We present a new Arctic sea level anomaly dataset based on the combination of three altimeter missions using an optimal interpolation scheme. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended …
View article: Comment on essd-2021-123
Comment on essd-2021-123 Open
Abstract. We present a new Arctic sea level anomaly dataset, based on the combination of three altimeter missions using an optimal interpolation scheme. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended…
View article: Arctic sea surface height maps from multi-altimeter combination
Arctic sea surface height maps from multi-altimeter combination Open
We present a new Arctic sea level anomaly dataset, based on the combination of three altimeter missions using an optimal interpolation scheme. Measurements from SARAL/AltiKa, CryoSat-2 and Sentinel-3A are blended together providing an unpr…
View article: Changes in Atlantic Water circulation patterns and volume transports North of Svalbard over the last 12 years (2008-2020) 
Changes in Atlantic Water circulation patterns and volume transports North of Svalbard over the last 12 years (2008-2020)  Open
<p>Atlantic Water (AW) enters the Arctic through Fram Strait as the West Spitsbergen Current (WSC). When reaching the south of Yermak Plateau, the WSC splits into the Svalbard, Yermak Pass and Yermak Branches. Downstream of Yermak Pl…
View article: New insights into the ice-covered Southern Ocean circulation from multi-altimeter combination.
New insights into the ice-covered Southern Ocean circulation from multi-altimeter combination. Open
<p>Subtle changes in the Southern Ocean subpolar ocean circulation patterns can lead to major changes in the global overturning circulation, as well as for floating ice-shelves with critical implications for global sea-level. It is t…
View article: Local sea level trends, accelerations and uncertainties over 1993-2019
Local sea level trends, accelerations and uncertainties over 1993-2019 Open
<p>Satellite altimetry missions provide a quasi-global synoptic view of sea level variations over more than 25 years and provide regional sea level (SL) indicators such as trends and accelerations. Estimating realistic uncertainties …
View article: Local sea level trends, accelerations and uncertainties over 1993–2019
Local sea level trends, accelerations and uncertainties over 1993–2019 Open