This global ECV soil moisture data set has been generated using active and passive microwave spaceborne instruments and covers the 35 year period from 1978 to 2013. 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. 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, and GCOM-W1 AMSR2.
The merged product is freely available after completion of a simple registration. User Registration can be found here.