CATDS-PDC L3OS 2Q - Debiased daily valid ocean salinity values product from SMOS satellite

This product is an intermediate product, that provides, in daily files, SSS corrected from land-sea contamination and latitudinal bias. Ascending and descending orbits are processed separately
 
Citation proposal
CATDS (2019) . CATDS-PDC L3OS 2Q - Debiased daily valid ocean salinity values product from SMOS satellite. CATDS (CNES, IFREMER, LOCEAN, ACRI) https://services.mspdata.eu:/geonetwork/srv/api/records/12dba510-cd71-4d4f-9fc1-9cc027d128b0

Simple

Date ( Publication )
2019-05-17
Date
Identifier
CATDS-PDC_L3OS_2Q
Identifier
DOI:10.12770/12dba510-cd71-4d4f-9fc1-9cc027d128b0
Credit
CATDS (CNES, IFREMER, LOCEAN, ACRI)

  Author

  Principal investigator

  Publisher

  Principal investigator

Thèmes Sextant ( Theme )
  • /Imagery/Satellite Imagery
GEMET - INSPIRE themes, version 1.0 ( Theme )
  • Orthoimagery
Keywords ( Theme )
  • SMOS , CATDS , CPDC , L3OS , Ocean Salinity , 2Q , Ocean Product
Use limitation
Creative Commons license to apply : Attribution (BY) : http://creativecommons.org/licenses/?lang=en
Access constraints
License
Use constraints
License
Other constraints
Spatial representation type
Grid
Denominator
1
Metadata language
English
Character set
UTF8
Topic category
  • Geoscientific information
N
S
E
W


Reference system identifier
EPSG / WGS 84 / NSIDC EASE-Grid 2.0 Global (EPSG:6933) / 8.6
Number of dimensions
3
Dimension name
Column
Dimension size
1388
Dimension name
Vertical
Dimension size
584
Dimension name
Sample
Dimension size
14
Cell geometry
Area
Transformation parameter availability
false
Distribution format
  • NetCDF (netcdf 3 with 64 bit offset option )

OnLine resource
RE06-ASC  

RE06-ASC - Reprocessed products (01/2010 - 04/2019), ascending orbits

OnLine resource
RE06-DESC  

RE06-DESC - Reprocessed products (01/2010 - 04/2019), descending orbits

OnLine resource
OPER-ASC  

OPER-ASC - Operational products (05/2019 - now), ascending orbits

OnLine resource
OPER-DESC  

OPER-DESC - Operational products (05/2019 - now), descending orbits

OnLine resource
ATBD L3OS  

Algorithm Theoretical Basis Document L3OS

OnLine resource
Pros/cons table  
OnLine resource
Reference  

Boutin J., Vergely J.L., Marchand S., D'Amico F., Hasson A., Kolodziejczyk Nicolas, Reul Nicolas, Reverdin G., Vialard J. (2018). New SMOS Sea Surface Salinity with reduced systematic errors and improved variability. Remote Sensing of Environment, 214, 115-134. Publisher's official version : http://doi.org/10.1016/j.rse.2018.05.022 , Open Access version : http://archimer.ifremer.fr/doc/00441/55254/

OnLine resource
CATDS Sipad  

CATDS Sipad - Web-based interactive tool which allows subsettings and temporal agregation.

OnLine resource
CATDS Web portal  

CATDS Web portal

OnLine resource
DOI of the product  

DOI of the product

Hierarchy level
Dataset
Statement

The base products, for all the CATDS-PDC (Centre Aval de Traitement des Données SMOS - Production & Dissemination Center) processing chains, are the SMOS L1B products from ESA (European Space Agency).

From these, brightness temperatures at various incidence angles are reconstructed. The Sea Surface Salinity (SSS) are retrieved from multi-angular brightness temperatures through a maximum likehood Bayesian approach in which measured Tb and Tb simulated using a forward direct model are compared (see Zine et al. 2008 for a general description of the retrieval method, and pro_con table for a summary of the similarities/differences with respect to ESA level 2 ocean salinity processing).

The qualified L3OS 2Q product is an intermediate product, that provides, in daily files, SSS corrected from land-sea contamination and latitudinal bias. Ascending and descending orbits are processed separately.

Products from reprocessing RE06 are available for the period 01/2010 - 04/2019. Products from operational (OPER) processing are available since 05/2019. Reprocessed products and operational products are derived using the same algorithm and configuration, hence ensuring the temporal continuity.

These products are generated with a delay of 5 days (Please see below for alternative 1-day delay products).

File naming :

SM_clas_MIR_CSF2Qx_startdate_enddate_vvv_ccc_7

- clas : File class (OPER : operational mode, REXX : reprocessing xx)

- x : A for ascending orbit, D for descending orbit

- startdate : sensing start date/time of the data (format yyyymmddThhmiss)

- enddate : sensing end date/time of the data (format yyyymmddThhmiss)

- vvv : version number of the processor generating the product

- ccc : file counter

File format :

In each archive file (.tgz extension), there are two files

- A Header file (.HDR), which is a text file, in XML Earth Explorer Header format

- A Data file (.DBL.nc), which is a netcdf file, format variant 2 (netcdf 3 with 64 bits offset option)

Alternative 1-day delay products :

Since 07/2019, 1-day delay products are also available, in operational (OPER) processing only.

These products are only available by FTP (i.e. not by Sipad). The paths and file names are identical, except that the "MIR" tags are replaced by "NRT".

Reference :

Boutin J., Vergely J.L., Marchand S., D'Amico F., Hasson A., Kolodziejczyk Nicolas, Reul Nicolas, Reverdin G., Vialard J. (2018). New SMOS Sea Surface Salinity with reduced systematic errors and improved variability. Remote Sensing of Environment, 214, 115-134. Publisher's official version : http://doi.org/10.1016/j.rse.2018.05.022 , Open Access version : http://archimer.ifremer.fr/doc/00441/55254/

Metadata

File identifier
12dba510-cd71-4d4f-9fc1-9cc027d128b0   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2020-05-29T10:53:43
Metadata standard name
ISO 19115:2003/19139 - SEXTANT
Metadata standard version
1.0

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  Overviews

L3OS_2Q_2019.png

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