Download the data



The data are hosted and can be accessed on the MEOM server opendap here. The disk space needed to locally download the full dataset (for the reconstruction experiment, the independant evaluation and the comparison) is approximately 33Go. The comparison data is by far the heaviest with approximately 26Go.

Data information

The dataset is presented with the following directory structure:

1) Data for experiment

Nadir alongtrack data (L3 products) for SSH map reconstruction

.
|-- alongtrack

2) Data for evaluation

Independant nadir alongtrack data (L3 products) for SSH evaluation

.
|-- independant_alongtrack
|   |-- alg		% DT Altika Drifting Phase Global Ocean Along track SSALTO/DUACS Sea Surface Height L3 product
|   |   |-- 2019
|   |   |   |-- dt_global_alg_phy_l3_2019*.nc

Independant drifters for currents evaluation

.
|-- independent_drifters
|   |-- uv_drifters_*.nc           % Drifter data
|   |-- index_history.txt          % Preprocessing drifter data information
|   |-- reformate_drifters.ipynb   % Preprocessing notebook (for informational purposes, not needed for experiments)

Auxiliary data for diagnostics

.
|-- sad
|   |-- distance_to_nearest_coastline_60.nc
|   |-- land_water_mask_60.nc
|   |-- variance_cmems_dt_allsat.nc

3) Data for comparison

Reconstruction maps for comparison

.
|-- maps
|   |-- DUACS_global_allsat-alg			% DUACS reconstruction			
|   |-- MIOST_geos_global_allsat-alg		% MIOST reconstruction
|   |-- MIOST_geos_barotrop_eqwaves_global_allsat-alg	% MIOST reconstruction with barotropic and equatorial waves processing

Download and read the data

The data can be downloaded locally using the wget command. We recommand that the data be stored in the data/ repository. For example, to download and unzip the experiment alongtrack data:

cd data/
wget https://ige-meom-opendap.univ-grenoble-alpes.fr/thredds/fileServer/meomopendap/extract/ocean-data-challenges/dc_Map_global_OSE/alongtrack.tar.gz 
tar -xvf alongtrack.tar.gz  
rm -f alongtrack.tar.gz

Example notebooks