Review of the CALIMAS team contributions to european space agency's soil moisture and ocean salinity mission calibration and validation

Adriano Camps, Jordi Font, Ignasi Corbella, Mercedes Vall-Llossera, Marcos Portabella, Joaquim Ballabrera-Poy, Verónica González, María Piles, Albert Aguasca, René Acevo, Xavier Bosch, Nuria Duffo, Pedro Fernández, Carolina Gabarró, Jérôme Gourrion, Sébastien Guimbard, Anna Marín, Justino Martínez, Alessandra Monerris, Baptiste MourreFernando Pérez, Nereida Rodríguez, Joaquín Salvador, Roberto Sabia, Marco Talone, Francesc Torres, Miriam Pablos, Antonio Turiel, Enric Valencia, José Martínez-Fernández, Nilda Sánchez, Carlos Pérez-Gutiérrez, Guido Baroncini-Turricchia, Antonio Rius, Serni Ribó

Research output: Contribution to journalReview articleResearchpeer-review

12 Citations (Scopus)


This work summarizes the activities carried out by the SMOS (Soil Moisture and Ocean Salinity) Barcelona Expert Center (SMOS-BEC) team in conjunction with the CIALE/Universidad de Salamanca team, within the framework of the European Space Agency (ESA) CALIMAS project in preparation for the SMOS mission and during its first year of operation. Under these activities several studies were performed, ranging from Level 1 (calibration and image reconstruction) to Level 4 (land pixel disaggregation techniques, by means of data fusion with higher resolution data from optical/infrared sensors). Validation of SMOS salinity products by means of surface drifters developed ad-hoc, and soil moisture products over the REMEDHUS site (Zamora, Spain) are also presented. Results of other preparatory activities carried out to improve the performance of eventual SMOS follow-on missions are presented, including GNSS-R to infer the sea state correction needed for improved ocean salinity retrievals and land surface parameters. Results from CALIMAS show a satisfactory performance of the MIRAS instrument, the accuracy and efficiency of the algorithms implemented in the ground data processors, and explore the limits of spatial resolution of soil moisture products using data fusion, as well as the feasibility of GNSS-R techniques for sea state determination and soil moisture monitoring. © 2012 by the authors.
Original languageEnglish
Pages (from-to)1272-1309
JournalRemote Sensing
Issue number5
Publication statusPublished - 1 May 2012


  • Calibration
  • GNSS-R
  • Imaging
  • Interferometry
  • Ocean salinity
  • Pixel disaggregation
  • Radio frequency interference
  • Radiometry
  • SMOS
  • Soil moisture
  • Validation


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