Minimize What is SMOS?
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ESA's Soil Moisture Ocean Salinity (SMOS) Earth Explorer mission is a radio telescope in orbit, but pointing back to Earth not space. It's Microwave Imaging Radiometer using Aperture Synthesis (MIRAS) radiometer picks up faint microwave emissions from Earth's surface to map levels of land soil moisture and ocean salinity.

These are the key geophysical parameters, soil moisture for hydrology studies and salinity for enhanced understanding of ocean circulation, both vital for climate change models.

Minimize Latest Mission Operations News
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Ocean Salinity Science Conference 2018

18 May 2018

ESA and CNES are jointly organizing the 2018 Ocean Salinity Science Conference, which will take place at the Sorbonne University, Paris, France, from 06 to 09 November 2018.


Users interested in participating can submit an abstract until 06 July 2018.

SMOS data collections maintenance - 28 March 2018

27 March 2018

Due to a software maintenance scheduled on Wednesday 28 March 2018, from 09:30 to 12:30 CEST, the data collections on the ESA SMOS online dissemination tool may not be updated with new products during the indicated time frame.

SMOS data dissemination maintenance - 20 March 2018

19 March 2018

Due to a scheduled software maintenance, access to the ESA SMOS online dissemination service will not be available on 20 March 2018 from 09:00 to 15:00 CET.

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

16 May 2018

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 from the SMOS Data dissemination portal.

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Nearly four decades of soil moisture data now available

03 November 2017

A new, long-term and global dataset of soil moisture measurements from space has been released to help us better understand the water cycle and climate, monitor agriculture and manage our water resources.

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Taking farming into the space age

01 August 2017

Satellites such as Europe's Copernicus Sentinel missions and ESA's SMOS and the upcoming Florescence Explorer, FLEX, provide a wealth of information about growing conditions and crop health that can be used to improve agricultural efficiency.

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DOMEX-3 2016 campaign data now available for Cal/Val users

25 July 2017

In-situ DOMEX-3 measurements for 2016 are now available for Cal/Val users along with the yearly campaign report. The measurements were acquired over the Antarctic plateau close to the Concordia base by tower based L-Band radiometer and by on-ground sensors for snow properties.