Jason-3 mission performance towards GDR-F

Hélène Roinard (CLS, France)

CoAuthors

Laure MICHAUD (CLS, FRANCE); Marine LIEVIN (CLS, FRANCE); François BIGNALET-CAZALET (CNES, FRANCE); Nicolas PICOT (CNES, FRANCE)

Event: 2019 Ocean Surface Topography Science Team Meeting

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

Presentation type: Type Poster

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 in few years by Jason-CS/Sentinel-6.
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. As Jason-3 is the reference mission used in operational applications or for delayed time studies and especially for monitoring of the Global Mean Sea Level, the assessment of Jason-3 data quality is particularly important and we pay special attention to the long-term stability of Jason Global Mean Sea Level (GMSL). 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 the mission performances for oceanic applications such as mesoscale or climate studies.
The monitoring of all altimeter and radiometer parameters is also routinely performed in order to detect jumps or drifts. After three years in orbit as a precise altimeter mission, two successive Jason-3 Safe Hold Modes occurred at the beginning of 2019. In this presentation we will give an 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/OSDR) at mono-mission crossovers and along-track.
Finally, in order to prepare Jason-CS/Sentinel-6 launch, reprocessing of Jason-3 GDR in standard F will begin in few months. We aim at presenting the overall performance of Jason-3 through different metrics highlighting the high-level accuracy of this mission and we will also focus on the way the future reprocessing would impact Jason-3 dataset.

 

Poster show times:

Room Start Date End Date
The Gallery Tue, Oct 22 2019,16:15 Tue, Oct 22 2019,18:00
The Gallery Thu, Oct 24 2019,14:00 Thu, Oct 24 2019,15:45
Hélène Roinard
CLS
France
hroinard@groupcls.com