- data decimation (altimetry-decimate)
- decimation from error wavelength
- editing from GLORYS-v2
- along-track outliers detection
- detidor (tide gauges)
We aim to automatically process the proper data density for data assimilation from an appropriate criterion, such as model error length scales. The error wave length can be estimated from the difference between the prior solutions and FES2004 or GOT4.8.
M2 tide - FES2012 prior versus GOT48
We aim to eliminate data that can be contaminated by non-tidal SSH signal. Error estimates coming from the harmonic analysis is a first guess of the level contamination. We wish to double the editing criterion by examining non-tidal SSH signal energy at aliased tidal frequencies from GLORYS products. The next two plots is an illustration for the M2 tide.
~60 days filtering
~60 days harmonic analysis
Ocean circulation ssh signal at M2 TP/J1/J2 aliased frequency
GLORYS-v2 ~60 days harmonic analysis
300 km smoothing
TP/J1/J2 M2 error estimates
Data error estimate, contamination part
Similarly to data editing, final error estimates will be based on both harmonic analysis diagnostics and GLORYS estimates
Data error estimate, data depletetion/processing part
In some areas (such as coastal areas), loss of data or data processing limitations can seriously degrade the quality of the harmonic constants. The smoothness of along-track data will be examined to detect outliers.