SMOS-IC

SMOS research products from SMOS-IC

The SMOS INRA-CESBIO (SMOS-IC) algorithm was designed by INRA (Institut National de la Recherche Agronomique) and CESBIO (Centre d’Etudes Spatiales de la BIOsphère) to perform global retrievals of SM and L-VOD. SMOS-IC is based on the two-parameter inversion of the L-MEB model as defined in Wigneron et al. (2017) and considering the pixel as homogeneous.

So, SMOS-IC was designed on the same basis as the level 2 SM algorithm but using some simplifications. Specifically, SMOS-IC does not account for corrections associated with the treatment of retrievals over regions with a heterogeneous land cover (forested areas), the antenna pattern and the complex SMOS viewing angle geometry.

One of the main goals of the SMOS-IC product was thus to be as independent as possible from auxiliary data so as to be more robust and less impacted by potential uncertainties in the afore-mentioned corrections.

The SMOS-IC algorithm and dataset is described in Fernandez-Moran et al. (2017). The current version is 105 and it is provided in the 25km EASEv2 grid, as netcdf format.

SMOS IC is scientific product delivered by the CATDS, i.e. meaning it is not an operational product updated on a daily basis for the time being.

Contact : Jean-Pierre Wigneron, jean-pierre.wigneron@inra.fr

References :

  • Wigneron J-P, Y. Kerr, P. Waldteufel, K. Saleh, M.-J. Escorihuela, P. Richaume, P. Ferrazzoli, P. de Rosnay, R. Gurney, J.-C. Calvet, J.P. Grant, M. Guglielmetti, B. Hornbuckle, C. Mätzler, T. Pellarin, M. Schwank, 'L-band Microwave Emission of the Biosphere (L-MEB) Model: Description and calibration against experimental data sets over crop fields', Remote Sens. Env., 107, p. 639-655, 2007.
  • Fernandez-Moran, R., Wigneron, J.-P., De Lannoy, G., Lopez-Baeza, E., Parrens, M., Mialon, A., Mahmoodi, A., Al-Yaari, A., Bircher, S., Al Bitar, A., Richaume, P., Kerr, Y., A new calibration of the effective scattering albedo and soil roughness parameters in the SMOS SM retrieval algorithm, Int J Appl Earth Obs Geoinformation, 62, 27–38, 2017. https://doi.org/10.1016/j.jag.2017.05.013
  • Fernandez-Moran R., A. Al-Yaari, A. Mialon, A. Mahmoodi, A. Al Bitar, G. De Lannoy, N. Rodriguez-Fernandez, E. Lopez-Baeza, Y. Kerr and J.-P. Wigneron, "SMOS-IC: An Alternative SMOS Soil Moisture and Vegetation Optical Depth Product", Remote Sensing, 9, 457; doi:10.3390/rs9050457, 2017

Product access

FTP access

The SMOS-IC research products are freely available on FTP :
ftp ftp.ifremer.fr
user : ext-catds-cecsm
password : catds2010
chdir : Land_products
or
ftp://ext-catds-cecsm:catds2010@ftp.ifremer.fr/Land_products

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