Empirical Ocean Tide Model (EOT)
Empirical Ocean Tide Model (EOT)DGFI-TUM's empirical ocean tide models are global solutions providing amplitudes and phases of the most dominant ocean tide constituents based on an empirical analysis of multi-mission satellite altimetry data. The models were obtained by means of residual harmonic analysis of multi-mission altimeter data with respect to FES2014 (Lyard et al, 2021) or FES2004 (Lyard et al, 2006). The most recent model is EOT20.
Ocean tide corrections and ocean load tide corrections from EOT11a/EOT20 are provided along-track for all available satellite altimeter missions. The EOT20 model itself (grids for different tide constituents) is available via SEANOE (https://www.seanoe.org/data/00683/79489/). The EOT11a model itself (grids for different tide constituents) is available via PANGAEA (http://doi.pangaea.de/10.1594/PANGAEA.834232).
Available Dataset(s)
Available version(s) of the product "Empirical Ocean Tide Model (EOT)" in OpenADB.
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Empirical Ocean Tide Model (EOT) (Recommended)
EOT20
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Empirical Ocean Tide Model (EOT)
EOT11a
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The EOT models are distributed in the hope that they will be useful, but DGFI-TUM provides EOT models "as is" without warranty, expressed or implied, as to the use or appropriateness of the EOT ocean tide models, and there are no warranties of merchantability or fitness for a particular purpose or use.
Data Format
The product "Empirical Ocean Tides (EOT)" includes the following parameters.
| Parameter | Description |
|---|---|
| glon | Longitude of Satellite Footprint |
| glat | Latitude of Satellite Footprint |
| jday | Julian Day 2000 |
| otide | Ocean Tide Correction |
| ltide | Ocean Load Tide Correction |
| oflags | Orbit Status and Quality Flags |
The data will be provided in NetCDF. More details on the data are available here.
OpenADB provides EOT11a/EOT20 models as ocean tide correction (otide) and loading tide correction (ltide) along-track per mission. In addition, gridded files for each constituent of EOT11a (where the tidal constants were stored in complex form, e.g. as cos- and sin-terms) as well as spherical harmonics are provided via FTP.
How to cite this product?
When using EOT20 please cite: "The EOT20 model was produced by DGFI-TUM based on multi-mission altimeter data and distributed via OpenADB (http://openadb.dgfi.tum.de). More details on the product are available in (Hart-Davis M.G., et al., 2021)."
When using EOT11a please cite: "The EOT11a model was produced by DGFI-TUM based on multi-mission altimeter data and distributed via OpenADB (http://openadb.dgfi.tum.de). More details on the product are available in (Savcenko and Bosch, 2012)."
Please also give credit to the respective institution(s) in charge of mission operation and maintenance (see bottom of this page).
References
All products are computed based on altimetry missions operated by NASA/CNES (TOPEX, Jason-1), ESA (ERS-1/2, Envisat, Cryosat-2), USNavy (Geosat,GFO), CNES/NASA/EUMETSAT/NOAA (Jason-2, Jason-3), ISRO/CNES (SARAL), EUMETSAT (Sentinel-3A/-3B), and NASA/EUMETSAT (Sentinel-6A). The original datasets are disseminated by AVISO, ESA, EUMETSAT, NOAA, and PO.DAAC.
FES2004 and FES2014 was produced by Legos and CLS Space Oceanography Division and distributed by Aviso, with support from Cnes (http://www.aviso.oceanobs.com/)".