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Data Download (CCI SM v04.4)

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Please note there will be a delay in approval of new users, since the approval and review required manual checks and verification. The CCI team look forward to working with you in 2019.

Please note, once you have registered for data access an automatic e-mail will be sent to your e-mail address. You need to click on the link in the automatic e-mail in order to receive the access credentials. Sometimes the automatic e-mail may also be trapped in your spam or junk mail box.

Data Download (ESA CCI SM v04.4)

This global ECV soil moisture data set has been generated using active and passive microwave spaceborne instruments and covers the (nearly) 40 year period from 1978 to 30.6.2018. 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.

The active data set is 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 is generated by Vandersat based on passive microwave observations from Nimbus 7 SMMR, DMSP SSM/I, TRMM TMI, Aqua AMSR-E, Coriolis WindSat, GCOM-W1 AMSR2, and SMOS.

ESA CCI SM v04.2 advanced 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.

The latest version (v04.4) is based on the algorithm of v04.2 with the dataset being extended to 2018-06-30. There have also been some small changes necessitated by the unavailability of data streams used in the generation of v04.2. For more details, please see the change log provided with the data.More information about the ESA CCI SM v04.4 product can be found in

The active, passive and merged products are freely available after completion of a short registration. DOWNLOAD ESA CCI SM v04.4 at

Using the Data

Please read the Product Specification Document (PSD) for information on how to use the product. This is also available in the docs folder of the FTP site (from which the data can be downloaded).

A package is available in python for reading the data as daily images and converting these images to timeseries and reading them.

Futher Information

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.