Value added Sentinel-3A sea level products by the Marine Altimetry L2P-L3 Service available since June 2017

Sabine Philipps (CLS, France)


Isabelino Denis (CNES, FRANCE); Marine Lievin (CLS, FRANCE); Marie-Isabelle Pujol (CLS, France); Michael Ablain (CLS, France); Carolina Nogueira Loddo (EUMETSAT, Germany)

Event: 2018 Ocean Surface Topography Science Team Meeting

Session: Application development for Operations

Presentation type: Type Poster

The Sentinel-3A satellite, which carries among other instruments a dual-frequency SAR altimeter (SRAL) was launched on 2016, February 16th (Sentinel-3B was successfully launched on 2018, April 25th). The Marine Payload Data Ground Segment (PDGS) in EUMETSAT provides Marine Level 2 SRAL products (along-track mono-mission product containing sea surface height anomaly as well as its components (orbit, altimeter range, geophysical corrections and models, etc.)).

In the frame of the Copernicus Programme funded by the European Union, under an EUMETSAT Contract, CNES with its subcontractor CLS have developed and are operating the Sentinel-3 Marine Altimetry L2P-L3 Service. The value-added sea level anomaly L2P products are along-track mono-mission products, providing as much as possible the same updated corrections and models for several altimeter missions, in order to facilitate inter-mission comparisons. The sea level anomaly is provided with a validity flag, enabling users to discard data with spurious measurements. The L3 products contain the valid and low-pass filtered sea level anomaly and absolute dynamic topography after inter-calibration with a reference mission. This is a major contribution to the Copernicus Marine Environment and Monitoring Service which distributes the data from all the altimetry satellites.

The Service was pre-operational since mid December 2016 and is fully operational since the 27th of June 2017. The following Sentinel-3A value added products are distributed to the users:
- Marine L2P products in near-real-time (NRT), short-time-critical (STC) and non-time-critical (NTC) timelinesses on AVISO+ ftp; NRT and STC products are also distributed via EUMETCast, EUMETSAT’S multi-service dissemination system.
- Global L3 products in near-real-time (NRT, based on short-time-critical L2P data completed with near-real-time L2P data) and delayed time (DT) timeliness via CMEMS

At the end of 2018 is foreseen to include Sentinel-3B in this service.

This L2P-L3 Service for Sentinel-3 is based on the existing operational system in place for Jason-2, CryoSat-2, SARAL, etc. It takes benefits of the well-proven organization and experience on past and existing activities. This service and its products will be presented in detail.

Poster show times:

Room Start Date End Date
Foyer, Salao Nobre & tent Thu, Sep 27 2018,18:00 Thu, Sep 27 2018,20:00
Foyer, Salao Nobre & tent Fri, Sep 28 2018,14:00 Fri, Sep 28 2018,15:00
Sabine Philipps