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Data Download (CCI SM v04.2)

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Data Download (ESA CCI SM v04.2)

This global ECV soil moisture data set has been generated using active and passive microwave spaceborne instruments and covers the 38 year period from 1978 to 2016. The data set consists of three products: an active data set, a passive data set and a combined data set. It provides daily surface soil moisture with a spatial resolution of 0.25 degree.

Besides the extended temporal coverage it now also includes the new sensors SMOS and MetOp-B ASCAT.

The active data set was generated by the Vienna University of Vienna (TU Wien) based on observations from the C-band scatterometers on board of ERS-1, ERS-2 and MetOp-A and MetOp-B.

The passive data set was generated by the VU University Amsterdam in collaboration with NASA based on passive microwave observations from Nimbus 7 SMMR, DMSP SSM/I, TRMM TMI, Aqua AMSR-E, Coriolis WindSat, GCOM-W1 AMSR2, and SMOS.

This latest release is advancing the previous version v03.3 by merging all active and passive L2 products directly to generate the COMBINED product (previously, this was created from the ACTIVE and PASSIVE products). In addition, soil moisture uncertainties are now available globally for all sensors except SMMR and spatial gaps in the triple collocation based SNR estimates are now filled using a polynomial SNR-VOD regression. Lastly, unreliable retrievals are masked before the merging of Level 2 products.

More information about the ESA CCI SM v04.2 product can be found in

The active, passive and merged products are freely available after completion of a short registration. DOWNLOAD ESA CCI SM v04.2 at

If you are interested in previous product versions, please send us a request at


For further information please visit the Documents and Frequently Asked Questions section of this website.