X-track, a new processing tool for altimetry in coastal areasL. ROBLOU, G. JAN, J. LAMOUROUX
Introduction of X-track processor and productsValidation of x-track SSH 1Hz product for CalVal applications
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Cycle
SS
H a
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te b
ias
(m
)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 consistencyG.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° 12,88,164Source 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
Point 5: Statistics on ssh bias results on a common epoch
Validation of the synthesis in order to reach a consensus on SSH bias value
Ssh bias diffusion to the next OSTST
Validation of the synthesis in order to reach a consensus on SSH bias value
Ssh bias diffusion to the next OSTST
Synthesis interpretation of variations
Point 4: Reporting errors estimates and validation phase
Point 3 : Choice of common criteria and unused cycles
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 consistencyG.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