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  • News - Success Stories

    News - Success Stories

    Transforming space data into climate action

    ESA’s Earth observation activities are playing a key role in the revitalised global drive to combat climate change.

  • News - Success Stories

    News - Success Stories

    Satellite data central to ocean monitoring

    Over 95% of Earth’s water is found in our oceans, and yet sadly, oceans are under stress from climate change and pollution. Monitoring our oceans is vital for Earth’s survival and satellites are the primary means of long-term and independent observation of our vast ocean bodies and their associated coastal zones.

  • News - Data Release news

    News - Data Release news

    SMOS L2 Sea Surface Salinity products documentation updates

    SMOS L2 Sea Surface Salinity product validation report is now available.

  • News - Data Release news

    News - Data Release news

    SMOS sea ice thickness Arctic winter season 2021/2022 data available

    SMOS Sea Ice thickness level 3 and level 4 data products are now available for the Arctic winter season 2021/2022.

  • News - Data Release news

    News - Data Release news

    Eight years of SMOS Arctic sea ice thickness level now available from SMOS Data dissemination portal

    Daily maps of sea ice thickness based on SMOS Observations, covering the winter seasons in the Arctic for the period of October-April from year 2010/2011 to year 2017/2018, are now available.

  • News - Data Release news

    News - Data Release news

    SMOS level 1 and level 2 products new baseline is now available

    New versions of the SMOS processors for level 1 and 2 were deployed in the operational ground segment on 25 May 2021.

  • Event - Workshop

    Event - Workshop

    Understanding the Carbon and Water Cycles using SMOS Data and Models

    The workshop aimed to bring together the EO, SMOS, Earth system science and modelling communities involved in the observation, characterisation and forecasting of land surface processes and their impacts.

  • Document - General Reference, Product Handbook

    Document - General Reference, Product Handbook

    SMOS Multimedia Book

    Learn more about ESA's SMOS mission in the interactive SMOS Multimedia Book.

  • Data - Data Description

    Data - Data Description

    SMOS - CryoSat L4 Sea Ice Thickness

    The SMOS-CryoSat merged Sea Ice Thickness Level 4 product, in NetCDF format, is based on estimates from both the MIRAS and the SIRAL instruments...

  • Data - Data Description

    Data - Data Description

    SMOS Soil Freeze and Thaw State

    The SMOS Level 3 Freeze and Thaw (F/T) product provides daily information on the soil state in the Northern Hemisphere based on SMOS observation...

  • News - General News

    News - General News

    New Earth Online Newsletter

    Stay up to date with the latest news in our newsletter.

  • Data - Data Description

    Data - Data Description

    SMOS L3 Sea Ice Thickness

    The SMOS Level 3 Sea Ice Thickness product, in NetCDF format, provides daily estimations of SMOS-retrieved sea ice thickness (and its uncertaint...

  • Mission - Earth Explorers

    Mission - Earth Explorers


    The Soil Moisture and Ocean Salinity (SMOS) mission is dedicated to making global observations of soil moisture over land and salinity over oceans.

  • Data - Campaigns data

    Data - Campaigns data

    Request campaigns data

    Request data acquired during airborne campaigns, many of which were conducted in support of ESA missions.

  • Tools - Visualisation

    Tools - Visualisation

    SMOS Global Mapping Tool

    The SMOS Global Mapping Tool (GMT) is useful for plotting the SMOS data into a single global geographical map.

  • Tools - Processing

    Tools - Processing

    SMOS NetCDF Conversion Tool

    The SMOS NetCDF Conversion Tool, for batch processing of large amounts of files, is available as a stand-alone command line executable or integrated in the SMOS Toolbox/SNAP.

  • News - Success Stories

    News - Success Stories

    Mapping salty waters

    The length and precision with which climate scientists can track the salinity, or saltiness, of the oceans is set to improve dramatically.

  • Instrument - Interferometric Radiometers

    Instrument - Interferometric Radiometers


    The MIRAS instrument is a passive microwave 2-D interferometric radiometer onboard the SMOS satellite.

  • Campaign



    The DOMEX-3 experiment is the follow on of two previous experiments called DOMEX-1 and DOMEX-2 which were successfully conducted at Concordia base, Antarctica

  • Document - General Reference

    Document - General Reference

    The Nine Candidate Earth Explorer Missions - Topography Mission

    This report for assessment addresses the Topography mission when it was selected with other nine Earth Explorer missions as a potential candidate for Phase A study.