Minimize SMOS Data quality

SMOS data quality reports and technical notes, data verification reports, animated maps for both operational (OPER) and reprocessed (REPR) dataset are available on this page.

The SMOS Monthly Quality report for operational (OPER) dataset provides:

  • summary of the main mission events occurred at flight segment and ground segment impacting the data quality during the reporting period
  • long-term analysis of the evolution of the instrument calibration parameters
  • processors and auxiliary files configuration updates
  • product quality disclaimers

The SMOS Data Quality Control report for reprocessed (REPR) dataset provides:

  • summary of the Data Quality Control analysis performed on the reprocessed dataset
  • long-term analysis of the evolution of selected quality control indicators
  • detailed information regarding data gaps and data degradation into the reprocessed dataset
  • product quality disclaimers

The SMOS Data Verification report for reprocessed (REPR) dataset provides:

  • summary of the results obtained by the Expert Support laboratories to verify the quality of the SMOS level 2 data

To access the reports and the animated maps see the links in the following tables:

SMOS Monthly Quality Reports
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Impact of ECMWF forecast cycle 41r2 on the SMOS level 2 sea surface salinity and soil moisture products

SMOS Mission Reprocessing Reports for the products baseline V6
  Data Quality Control Reports Data Verification Reports
L1 Products L1 V620 QC  
L2 Sea Surface Salinity Product L2 OS V622 QC L2 OS V622
L2 Soil Moisture Product L2 SM V620 QC L2 SM V620

The brightness temperature maps for Land and Sea surface provide an overview of the average weekly signal sensed by SMOS. The maps are derived from the level 1 browse products and are computed for selected Stokes parameters at ascending and descending passes. The data in the maps are not filtered by RFI and other anomalies therefore strong signal corruption can be observed for some period, in some region over the Earth surface. The maps are generated for quality control purposes mainly to check the data coverage and the long term brightness temperature value consistency.

To access the SMOS level 1 maps see the links in the following table:

SMOS Brightness Temperature weekly maps - Land Surface
(since January 2010 onwards)
Ascending Stokes-1 Stokes-3 Stokes-4
Descending Stokes-1 Stokes-3 Stokes-4
SMOS Brightness Temperature weekly maps - Sea Surface
(since January 2010 onwards)
Ascending Stokes-1 Stokes-3 Stokes-4
Descending Stokes-1 Stokes-3 Stokes-4


The soil moisture maps provide an overview of the average weekly soil moisture retrieved from SMOS level 1 brightness temperature. The maps are derived from the level 2 SM products and are computed for ascending and descending passes. The level 1 measurements contaminated by the RFI are filtered out by the level 2 processor. For that reason the data coverage can be impacted in the area affected by permanent RFI sources. The soil moisture retrieval is also impacted by frozen / thawing soil therefore the global coverage of soil moisture data has a seasonal evolution as shown in the maps. The maps are generated for quality control purposes mainly to check the data coverage and the long term soil moisture value consistency.

To access the SMOS level 2 soil moisture maps see the links in the following table:

SMOS Soil Moisture weekly maps
Ascending Soil Moisture
Descending Soil Moisture


The sea surface salinity maps provide an overview of the average weekly sea surface salinity retrieved from SMOS level 1 brightness temperature. The maps are derived from the level 2 OS products and are computed for ascending and descending passes. The level 1 measurements contaminated by the RFI, and instrument anomalies are filtered out by the level 2 processor. The maps show only data retrieved with good quality for the three sea roughness model implemented in the level 2 processor. For that reason there is a reduced data coverage for descending passes during the boreal winter season mainly due to thermal effects in the instrument antennae not fully compensated by the current calibration algorithm. The maps are generated for quality control purposes mainly to check the data coverage and the long term sea surface salinity values consistency.

To access the SMOS level 2 sea surface salinity maps see the links in the following table:

SMOS Sea Surface Salinity weekly maps
Ascending Salinity-1 Salinity-2 Salinity-3
Descending Salinity-1 Salinity-2 Salinity-3