Mobile version

Mesoscale Eddy Trajectories Atlas Product

Several versions of the Mesoscale Eddy Trajectories Atlas are available to users. The main characteristics of each version are described below, the details are on each product page:

  META 3.2exp NRT META3.1exp DT META 2.0 DT
Constellation All satellites All satellites Two satellites Two satellites
DOI - 10.24400/527896/a01-2021.001 10.24400/527896/a01-2021.002 -
Timeliness Near-Real-Time Delayed-time Delayed-time
Period 01/01/2018 - ongoing (with 15 days delay) 1993/01/01 - 2020/03/07 1993/01/01  - 2020/03/07
Geographical coverage Global
Delivery format 2 files (1 for cyclonic and 1 for anticyclonic) 3 files for each anticyclonic and cyclonic eddies :
            long, short and untracked,
1 file for all the period
Update Every day April 2021 December 2020
Product Page with handbook META3.2exp NRT META3.1exp DT META2.0 DT
Constellation All satellites All satellites Two satellites Two satellites
Origin of upstream products CMEMS Near-Real-Time CMEMS Delayed-Time C3S Delayed-Time C3S Delayed-Time
Input variable ADT (Absolute Dynamic Topography) SLA (Sea Level Anomaly)
Preprocessing Lanczos filter with a Bessel window 2D
            (cutoff 700 km, order 1)
Lanczos filter 2D
(1000 km)
Identification Py Eddy Tracker algorithm (collaboration with E. Mason)
Provide Eddy position, Speed and Effective Radius, Amplitude, associated contours, speed profile
Oregon State University algorithm (collaboration with D. Chelton) 
Provide Eddy position, Speed Radius, Amplitude
Number of extrema in one eddy Only one At least one
Shape error 70% -
Amplitude threshold 0.4 cm 1 – 45 cm
Tracking Py Eddy Tracker : association of eddies within a trajectory by contours’ overlap, virtual observations, subsetting Py Eddy Tracker : Management of short missing detection, land control, subsetting available for wanted areas or trajectory duration, research of candidates in a restricted area
Method Overlap between eddies Research for candidates in a restricted area
Land control - yes
Virtual observations Max of 4 consecutive virtual eddies Max of 3 consecutive virtual eddies
Minimum Lifetime 10 days 28 days
Rss feedsContactPartnersFAQLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!