With the decision to release the Geophysical Data Record (GDR), the Jason-3 partner agencies CNES, NOAA, NASA/JPL and EUMETSAT ensure the availability of the full suite of Jason-3 products and confirm Jason-3 as the operational reference mission for ocean altimetry. This also enlarges the portfolio of ocean products offered by the Copernicus Programme of the European Commission.
Thursday, 24 November 2016
The GDR, available within 60 days, is the most accurate and complete among the Jason-3 products. It offers fully validated sea surface height data for the international science community. In the context of operational oceanography, for example, it is used primarily for ocean reanalysis.
The product also delivers data for climate monitoring, here in particular climate model verification, sea level monitoring and climate change assessment. The International Panel for Climate Change – IPCC – relies on the GDR for its reports.
With sea-level rise threatening coastlines and low-lying areas, the “(...) continuation of highly accurate sea level measurements from Jason will allow us to quantify sea level rise quickly, gaining precious time to respond.” (Gerrit Burgers, Senior advisor for Rijkswaterstaat Water, Transport and Environment)
The Near-Real-Time Operational Physical Data Records (OGDR) products, disseminated to the EUMETSAT Users via EUMETCast and the Global Telecommunications System (GTS), and the Interim Geophysical Data Records (IGDR), distributed by CNES, have been available since 1 July.
OGDRs include estimates of significant wave height, wind speed, and a first estimate of sea surface height based on orbit data and atmospheric corrections available in real time. They are disseminated to users within three hours of observation. IGDRs are distributed within one and a half days of observation and provide more accurate estimates of sea surface height thanks to improved orbit determination.
The Jason-3 satellite was successfully launched on 17 January 2016, ensuring the continuation of the success story that started with Topex Poseidon 20 years ago. The extension of this service in the long term is also secured by the two Jason-CS satellites planned to be launched in 2020 and 2025 as part of the Sentinel-6 mission.
Sea Level Rise Measurements 1993 - 2016
Jason-3 is the result of an international partnership between EUMETSAT, the French Space Agency (CNES), the US National Oceanic and Atmospheric Administration (NOAA), the US National Aeronautics and Space Administration (NASA), and the European Union, which funds the European contribution to Jason-3 mission operations as part of the European Commission's Copernicus Programme.
Within Copernicus, Jason-3 is the reference mission for cross-calibrating Sentinel-3 observations of sea surface height and the precursor to the future cooperative Sentinel-6/Jason-CS mission also implemented in partnership between Europe and the United States.
Further processed Jason-3 data form part of the Copernicus Marine Environment Monitoring Service portfolio of products and services.