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)

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

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.2018.05.0 22 , 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  

OnLine resource

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.2018.05.0 22 , 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