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Open Altimeter Database (OpenADB) Deutsches Geodätisches Forschungsinstitut
Technische Universität München

Empirical Ocean Tide Model (EOT)

Empirical Ocean Tide Model (EOT)
Empirical Ocean Tide Model (EOT11a)

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 FES2004 (Lyard et al, 2006). The most recent model is EOT11a.

Ocean tide corrections and ocean load tide corrections from EOT11a are provided along-track for all available satellite altimeter missions. 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.

Empirical Ocean Tide Model (EOT) (Recommended)

EOT20

Empirical Ocean Tide Model (EOT)

EOT11a
  • Mission Dataset Freq. Cycles Dates
    Envisat SGDR v2.1 1 Hz 006 - 094 2002-05-14 18:33:08 -
    2010-10-22 00:10:40
    Envisat (Extended Mission) SGDR v2.1 1 Hz 095 - 113 2010-10-26 07:56:16 -
    2012-04-08 10:54:23
    ERS-1 (Phase A) SGDR/REAPER 1 Hz 002 - 046 1991-08-03 21:18:17 -
    1991-12-14 21:31:01
    ERS-1 (Phase B) SGDR/REAPER 1 Hz 047 - 081 1991-12-14 21:41:09 -
    1992-03-25 23:16:17
    ERS-1 (Phase C) SGDR/REAPER 1 Hz 082 - 101 1992-03-25 23:26:57 -
    1993-12-23 19:43:02
    ERS-1 (Phase D) SGDR/REAPER 1 Hz 103 - 138 1993-12-24 22:32:23 -
    1994-04-10 16:23:58
    ERS-1 (Phase E) SGDR/REAPER 1 Hz 139 - 140 1994-04-11 07:02:02 -
    1994-09-28 02:56:28
    ERS-1 (Phase F) SGDR/REAPER 1 Hz 141 - 143 1994-09-28 02:56:30 -
    1995-03-24 00:08:48
    ERS-1 (Phase G) SGDR/REAPER 1 Hz 144 - 156 1995-03-24 00:24:24 -
    1996-06-02 21:59:27
    ERS-2 SGDR/REAPER 1 Hz 000 - 085 1995-05-14 01:34:00 -
    2003-07-02 07:10:05
    Geosat GDR 1 Hz 001 - 068 1986-11-08 00:46:56 -
    1989-12-29 15:28:24
    Geosat (Geodetic Mission) GDR 1 Hz 001 - 025 1985-03-31 00:00:00 -
    1986-09-30 23:55:59
    Geosat Follow-On GDR 1 Hz 037 - 222 2000-01-07 17:30:36 -
    2008-09-07 22:52:00
    Jason-1 SGDR-E 1 Hz 001 - 259 2002-01-15 06:08:06 -
    2009-01-26 08:49:42
    Jason-1 (Extended Mission) SGDR-E 1 Hz 262 - 374 2009-02-10 18:01:37 -
    2012-03-03 12:59:11
    Jason-1 (Geodetic Mission) SGDR-E 1 Hz 500 - 537 2012-05-07 16:04:16 -
    2013-06-21 00:51:55
    Jason-2 SGDR-D 1 Hz 000 - 303 2008-07-04 12:19:19 -
    2016-10-02 11:53:32
    Jason-2 (Extended Mission) SGDR-D 1 Hz 305 - 320 2016-10-13 20:00:22 -
    2017-03-15 02:34:09
    Jason-3 SGDR-T 1 Hz 000 - 055 2016-02-12 01:11:09 -
    2017-08-15 19:07:45
    Poseidon GDR 1 Hz 001 - 361 1992-10-01 16:45:02 -
    2002-07-12 14:28:19
    SARAL SGDR-T 1 Hz 001 - 035 2013-03-14 05:44:35 -
    2016-07-04 11:06:30
    SARAL (Drifting Phase) SGDR-T 1 Hz 100 - 111 2016-07-04 12:54:01 -
    2017-08-28 14:36:27
    Topex GDR 1 Hz 001 - 365 1992-09-25 05:19:37 -
    2002-08-15 17:44:37
    Topex (Extended Mission) GDR 1 Hz 368 - 481 2002-09-16 20:55:12 -
    2005-10-08 23:49:38

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 EOT models as ocean tide correction (otide) and loading tide correction (ltide) along-track per mission. In addition, gridded files for each constituent (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 this data 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

Acknowledgment

All products are computed based on altimetry missions operated by NASA/CNES (TOPEX, Jason-1), ESA (ERS-1/2, Envisat, Cryosat-2), USNavy/NOAA (GFO), CNES/NASA/Eumetsat/NOAA (Jason-2, Jason-3), ISRO/CNES (Saral), and EUMETSAT (Sentinel-3). The original data sets are disseminated by AVISO, ESA, NOAA, and PODAAC.

FES2004 was produced by Legos and CLS Space Oceanography Division and distributed by Aviso, with support from Cnes (http://www.aviso.oceanobs.com/)".

The development of EOT models was funded by the Deutsche Forschungsgemeinschaft (DFG) under grant BO1228/5. EOT08a/EOT10a/EOT11a are public models and may be freely redistributed if appropriate reference is made to the report, mentioned above.

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