Abstract's details

Jason-3 GDR-F mission performances over ocean

Hélène Roinard (CLS, France)


François Bignalet-Cazalet (CNES, France); Nicolas Picot (CNES, France); Fanny Piras (CLS, France); Jerome Coquelin (ALTEN for CLS, France)

Event: 2022 Ocean Surface Topography Science Team Meeting

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

Presentation type: Type Oral

Contribution: PDF file


TOPEX/Poseidon, Jason-1, Jason-2, and then Jason-3 have allowed to build a high-precision ocean altimetry data record on historical ground track and will be followed by Sentinel-6-MF as the reference mission.
Long-term monitoring of the Jason altimetric system is routinely performed at CLS, as part of the CNES SALP (Système d'Altimétrie et Localisation Précise) project. The main objective of this activity is to provide an estimation of these missions’ performances for oceanic applications such as mesoscale or climate studies. As TOPEX/Jason/Sentinel-6 are the reference missions used in operational applications or for delayed time studies and especially for monitoring of the Global Mean Sea Level, we pay special attention to the long-term stability of their Global Mean Sea Level (GMSL). The Jason-3 GDR-F data have been provided to users since cycle 171 (2020, September), and data reprocessing in standard “F” was performed during 2021 over the past. This reprocessing campaign has a twofold objective: improve the quality of the products and share common standards with Sentinel-6/Jason-CS, as Sentinel-6 datasets have followed standard “F” from its launch (in 2020, November) onwards.
A precise knowledge of Jason-3 data quality and errors is a key activity to ensure a reliable service to scientists involved in climate change studies as well as operational oceanography. The monitoring of all altimeter and radiometer parameters is routinely performed to detect jumps or drifts. After six years in orbit as a precise altimeter mission, we will give in this presentation an updated with standard “F” overview of Jason-3 data coverage and data quality concerning altimeter and radiometer parameters, but also the performance of delayed and real time products (GDR, IGDR, OGDR) at mono-mission crossovers and along-track. We will also focus on the way the reprocessing impacts Jason-3 dataset and these performances.

Oral presentation show times:

Room Start Date End Date
Sala Grande Wed, Nov 02 2022,11:15 Wed, Nov 02 2022,11:30
Hélène Roinard