Regional X-TRACK altimeter products for coastal applications: updates and evolutions

Nicolas Fuller (LEGOS/CTOH, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France)

CoAuthors

Florence Birol (LEGOS/CTOH, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France); Fernando Niño (LEGOS/CTOH, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France); Florent Lyard (LEGOS, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France); Sara Fleury (LEGOS/CTOH, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France); Damien Allain (LEGOS, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France, France)

Event: 2015 Ocean Surface Topography Science Team Meeting

Session: Outreach, Education and Altimetric Data Services

Presentation type: Type Poster

The CTOH (Centre of Topography of the Oceans and the Hydrosphere) is an independant research service dedicated to satellite altimetry studies. One of its objectives is to optimize the completness and the accuracy of the sea surface height information derived from satellite altimetry in coastal areas. A dedicated tool, called X-TRACK, has been used since 2008 in order to process up-to-date altimeter products from Topex/Poseidon, Jason-1&2, Geosat Follow On and Envisat satellites. X-TRACK produces 1Hz along-track Sea Level Anomaly (SLA) time series over 23 coastal regions, which are available on our website (http://ctoh.legos.obs-mip.fr/products/coastal-products) and on the new AVISO+ web portal. Along-track tidal constants (including the amplitude, phase lag and error estimates for a number of tidal constituents) are also computed from the harmonic analysis of the SLA long time series.

Recently, X-TRACK code was rewritten to gain consistency and efficiency in the data processing workflow. We also revisited several aspects of the processing, as the altimetry corrections or the data editing strategy which has been significantly improved in order to obtain a better data quality for the points closest to the coast. Finally, the new finite element global tides atlas FES2014 (F. Lyard et al.) is used in place of FES2012 to remove the tidal signal. We present here our first results by comparing the new X-TRACK along track SLA with co-located tide gauges in various regions and discuss the future improvements of our products.

 

Poster show times:

RoomStart DateEnd Date
Grand Ballroom Foyer Thu, Oct 22 2015,11:00 Thu, Oct 22 2015,18:00
Nicolas Fuller
LEGOS/CTOH, UMR5566 CNRS-CNES-IRD-Université de Toulouse III. OMP, 14 Av. E. Belin, 31400 Toulouse, France
France
Nicolas.fuller@legos.obs-mip.fr