| OVERVIEW |
General information :DUACS (Data Unification and Altimeter Combination System) is part of the CNES multi-mission ground segment (SSALTO). It processes data from all altimeter missions: Jason-1, T/P, ENVISAT, GFO, ERS1/2 and even GEOSAT. DUACS provides a consistent and homogeneous catalogue of products for varied applications, both for near real time applications and offline studies.
Processing information: To produce (M)SLA and (M)ADT in near-real time, the SSALTO/DUACS system uses the latest high-quality altimeter data produced in Near-Real-Time (IGDR).
SALTO/DUACS system acquires then synchronize altimeter data and auxiliary data; each mission is homogenized using the same models and corrections.
The Input Data Quality Control check that the system uses the best altimeter data. The multi-mission cross-calibration process removes any residual orbit error, or long wavelength error (LWE), as well as large scale biases and discrepancies between various data flows; all altimeter fields are interpolated at crossover locations and dates.
After a repeat-track analysis, a mean profile is substracted to compute sea level anomaly. Data are then cross validated, filtered from residual noise and small scale signals, and finally sub-sampled (Sea level Anomaly product, SLA).
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| PARAMETERS GROUP |
| (from BODC) |
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| PARAMETERS
(parameter, unit, convention)
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- sea_surface_height_above_sea_level,m,CF
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