GLOBAL OCEAN ALONG-TRACK L3 SEA SURFACE HEIGHTS REPROCESSED (1993-ONGOING) TAILORED FOR DATA ASSIMILATION

'''Short description:'''

Altimeter satellite along-track sea surface heights anomalies (SLA) computed with respect to a twenty-year [1993, 2012] mean. All the missions are homogenized with respect to a reference mission (see QUID document or http://duacs.cls.fr [http://duacs.cls.fr] pages for processing details). The product gives additional variables (e.g. Absolute Dynamic Topography, ADT) that can be used to change the physical content for specific needs. This product is processed by the DUACS multimission altimeter data processing system. It serves in near-real time the main operational oceanography and climate forecasting centers in Europe and worldwide. It processes data from all altimeter missions: Jason-3, Sentinel-3A/B, HY-2A, Saral/AltiKa, Cryosat-2, Jason-2, Jason-1, T/P, ENVISAT, GFO, ERS1/2. It provides a consistent and homogeneous catalogue of products for varied applications, both for near real time applications and offline studies.

To produce SLA in delayed-time (REPROCESSED), the system uses the Geophysical Data Records which are computed from a Precise Orbit Ephemeris (POE) and are delivered within 3 months depending on the mission. Reanalysis products are more precise than NRT products. The system acquires and then synchronizes altimeter data and auxiliary data; each mission is homogenized using the same models and corrections. The Input Data Quality Control checks 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, which is peculiar to each mission, or a Mean Sea Surface (MSS) (when the orbit is non repetitive) is subtracted to compute sea level anomaly. The MSS is available via the Aviso+ dissemination (http://www.aviso.altimetry.fr/en/data/products/auxiliary-products/mss.html [http://www.aviso.altimetry.fr/en/data/products/auxiliary-products/mss.html]). Data are then cross validated, filtered from residual noise and small scale signals (sla_filtered variable). The ADT (Absolute Dynamic Topography, adt_filtered variable) is then computed as follows: adt_filtered=sla_filtered+MDT where MDT is the Mean Dynamic Topography distributed by Aviso+ (http://www.aviso.altimetry.fr/en/data/products/auxiliary-products/mdt.html [http://www.aviso.altimetry.fr/en/data/products/auxiliary-products/mdt.html]).

'''DOI (product)''':

https://doi.org/10.48670/moi-00146

Citation proposal
Yannice Faugère (SL-CLS-TOULOUSE-FR). GLOBAL OCEAN ALONG-TRACK L3 SEA SURFACE HEIGHTS REPROCESSED (1993-ONGOING) TAILORED FOR DATA ASSIMILATION. https://services.mspdata.eu:/geonetwork/srv/api/records/7336c88a-ddd3-4137-9d18-790a612335ef

Alternate title: SEALEVEL_GLO_PHY_L3_MY_008_062

Date ( Creation ): 2012-08-26

Edition: 2.1

Edition date: 2012-08-28

Identifier: 7336c88a-ddd3-4137-9d18-790a612335ef

Credit: E.U. Copernicus Marine Service Information

Point of contact

SL-CLS-TOULOUSE-FR - servicedesk.cmems@cls.fr

Custodian

SL-CLS-TOULOUSE-FR - Yannice Faugère

Originator

SL-CLS-TOULOUSE-FR - Françoise MERTZ

Distributor

SL-CLS-TOULOUSE-FR - Françoise Mertz

Resource provider

SL-CLS-TOULOUSE-FR - Pascal Mambert

Maintenance and update frequency: Irregular

Other: P0M0D0H/P0M0D0H

Maintenance note: N/A

Maintenance and update frequency: Annually

GEMET - INSPIRE themes, version 1.0 ( Theme )

Oceanographic geographical features

Discipline ( Discipline )

satellite-observation

Climate and Forecast Standard Names ( parameter )

sea_surface_height_above_sea_level , sea_surface_height_above_geoid

Temporal scale ( temporal-scale )

multi-year

Area of benefit ( area-of-benefit )

marine-safety , coastal-marine-environment , marine-resources , weather-climate-and-seasonal-forecasting

Reference Geographical Areas ( reference-geographical-area )

arctic-ocean , global-ocean

Processing level ( processing-level )

Level 3

Model assimilation ( Theme )

Not Applicable

Use limitation: See Copernicus Marine Environment Monitoring Service Data commitments and licence at: http://marine.copernicus.eu/web/27-service-commitments-and-licence.php

Access constraints: Other restrictions

Use constraints: License

Other constraints: No limitations on public access

Aggregate Datasetindentifier: 6be352f9-a484-499e-9bfe-f60100946cad

Association Type: Cross reference

Initiative Type: document

Aggregate Datasetindentifier: 3abb7265-ac70-4ece-a426-c19b83837f4b

Association Type: Cross reference

Initiative Type: document

Metadata language: eng

Topic category

Oceans

Description: bounding box

N

S

E

W

Vertical extent

Vertical CRS

urn:ogc:def:crs:EPSG:5714

Supplemental Information: display priority: 10100

Reference system identifier: EPSG / WGS84 / Simple Mercator (EPSG:41001)

Number of dimensions: 2

Dimension name: Row

Resolution: 7 km

Dimension name: Column

Resolution: 7 km

Cell geometry: Area

Transformation parameter availability: false

Distribution format

NetCDF-4 ( )

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Hierarchy level: Series

Conformance result

Date ( Publication ): 2010-12-08

Explanation: See the referenced specification

Statement: The myOcean products depends on other products for production or validation. The detailed list of dependencies is given in ISO19115's aggregationInfo (ISO19139 Xpath = "gmd:MD_Metadata/gmd:identificationInfo/gmd:aggregationInfo[./gmd:MD_AggregateInformation/gmd:initiativeType/gmd:DS_InitiativeTypeCode/@codeListValue='upstream-validation' or 'upstream-production']")

Metadata

File identifier: 7336c88a-ddd3-4137-9d18-790a612335ef XML

Metadata language: English

Character set: UTF8

Hierarchy level: Series

Hierarchy level name: Copernicus Marine Service product specification

Date stamp: 2021-12-09T18:54:24

Metadata standard name: ISO 19139, MyOcean profile

Metadata standard version: 0.2

Point of contact

CMEMS

Website: http://marine.copernicus.eu/

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