MERSEA merseaip@ifremer.fr 2007-11-23 AVISOaviso@cls.frhttp://www.jason.oceanobs.comhome web pagehttp://www.mersea.eu.org/images/logos/aviso.gif FTP/netCDF 3.X N/A ftp://ftp.cls.fr/pub/oceano/AVISO/SSH/duacs/global/nrt/sla ftp MERSEA/MIMhttp://www.mersea.eu.org/Information/MerseaInformationSystem.htmlhome web pagehttp://www.mersea.eu.org/images/logos/Mersea_very_small.gif HTTP/image N/A http://bulletin.mersea.eu.org/html/produits/mersea_vs/view.php3?zone=glo-glo http Ssalto / Duacs Near-Real Time Sea Level Anomalies AVISO-GLOBAL-NRTSLA-OBS 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). ]]> AVISO aviso@cls.frhttp://www.jason.oceanobs.comhome web pagehttp://www.mersea.eu.org/images/logos/aviso.gif Remote sensing TEP webmaster-mersea@mersea.eu.orghttp://w3.mersea.eu.org/html/remote_sensing/welcome.htmlhome web page Remote Sensing datasets Along track (observations) ASLV: Sea level sea_surface_height_above_sea_level,m,CF http://www.mersea.eu.org/images/products-quicklooks/AVISO.gif product QuickLook GIF 7 km -180.0 180.0 -80.0 80.0 vertical : Ocean surface, geographical : Global scale, temporal : Near real time, 0 0 meters 2001-08-01 arctic 63,-35 90,-35 70,30 63,7 63,-35 baltic sea 66.20,20 66.20,26 59.5,30.19 53.49,20.55 53.49 9.23 57.44,10.30 59,11 66.20,20 global ocean -90,180 90,180 90,-180 -90,-180 -90,180 mediterranean sea 35.47,-5.54 36.15,-5.54 46,5 46,15 40.25,26.41 38,38 30,35 29,19 35.47,-5.54 north east atlantic 48.27,-35 63,-35 63,7 59,11 57.44,10.30 53.49,9.23 48.27,-1.24 48.27,-35 temporal resolution : quality control procedure ftp://ftp.cls.fr/pub/oceano/DUACS/QualityReports/latest/ user's manual http://www.aviso.oceanobs.com/documents/donnees/duacs/handbook_duacs.pdf 2006-10-09 more information http://www.aviso.oceanobs.com/duacs/ public 4326