X-track, a new processing tool for altimetry in coastal areas L. ROBLOU, G. JAN, J. LAMOUROUX Introduction of X-track processor and products Validation of x-track SSH 1Hz product for CalVal applications SSH absolute bias at M3 tide gauge, Jason-1 pass 085 Mean=0.1046m Std dev= 0,0252m Jason-1 pass 222 Jason-1 pass 085 M3 tide gauge (Senetosa) Applied to : GOCEAN Project * ALTICORE Project (Poster at Hobart OSTST) Le Hénaff studies (Gulf of Bisay)* Maraldi studies (Kerguelen) (Poster at Hobart OSTST)

Nothing new. But, the exercise could give a common framework for ssh bias computing with conditions as homogeneous as possible. This exchange plan would be made with the participant CalVal teams. It would be proposed to be applied before OSTST future meetings. Suggestion of a common exercise for in situ CalVal and data consistency G.Jan (1), Y. Ménard (2), P. Bonnefond (3), O. Laurain (3), L. Roblou (1) (1) NOVELTIS (2) CNES (3) OCA Proposal to compare and synthesize sea surface height (ssh) bias results from in situ CalVal methods. To analyse the results from CalVal sites on a computing basis as comparable as possible Jas-1 ascending passes n°47, 149, 225 Ja-1 descending passes n° 12,88,164 Source figure: Xscan software (F. Lyard et al.) : global bathymetry from POC-LEGOS database Ja-1 passes n°43, 206 Jas-1 ascending passes n°9, 85,187 Ja-1 descending passes n° 44, 70, 222 Ja-1 passes N° 19, 109

Proposal of exercise to compare and synthesize sea surface height (ssh) bias results from in situ CalVal methods. To analyse the results from CalVal sites on a computing basis as comparable as possible Suggestion of a common exercise for in situ CalVal and data consistency G.Jan (1), Y. Ménard (2), P. Bonnefond (3), O. Laurain (3), L. Roblou (1) (1) NOVELTIS (2) CNES (3) OCA It requires: from the different works on in situ CalVal missions. The definition of a common protocol to compute ssh bias (epoch, corrections choices) The implementation and realization of the CalVal exercise for participant teams. Results analyses