Evaporation-based disaggregation of surface soil moisture data: the dispatch method, the CATDS product and on-going research

Olivier Merlin, Luis Olivera-Guerra, Bouchra Ait Hssaine, Abdelhakim Amazirh, Yoann Malbeteau, Vivien Stefan, Beatriz Molero, Zoubair Rafi, Maria Jose Escorihuela, Jamal Ezzahar, Said Khabba, Jeffrey Walker, Yann Kerr, Vincent Simonneaux, Salah Er-Raki

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


The soil evaporation is under atmospheric conditions non-limited in energy-strongly linked to the near-surface soil moisture sensed by microwave radiometers. This has been the rationale for developing the DisPATCh (Disaggregation based on Physical And Theoretical scale Change) method, which relies on thermal-derived evaporation to improve the spatial resolution of SMOS (Soil Moisture and Ocean Salinity) like data. In practice, the disaggregation scheme estimates the 0-5 cm soil moisture at 1 km resolution by combining 40 km SMOS soil moisture, 1 km resolution MODIS (MODerate resolution Imaging Spectroradiometer) data, and a multi-scale soil evaporation model. This paper provides an overview of 1) the current status and main assumptions of DisPATCh, 2) the DisPATCh-based processor implemented in the Centre Aval de Traitement des Données SMOS (CATDS), and 3) related ongoing research including advanced modeling of soil evaporation and the prospect of coupling thermal- and radar-based soil moisture downscaling approaches.

Original languageEnglish
Title of host publication2017 IEEE International Geoscience and Remote Sensing Symposium
Subtitle of host publicationInternational Cooperation for Global Awareness, IGARSS 2017 - Proceedings
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9781509049516
Publication statusPublished - 1 Dec 2017
EventIEEE International Geoscience and Remote Sensing Symposium 2017 - Fort Worth, United States of America
Duration: 23 Jul 201728 Jul 2017
Conference number: 37th
https://ieeexplore.ieee.org/xpl/conhome/8118204/proceeding (Proceedings)

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)


ConferenceIEEE International Geoscience and Remote Sensing Symposium 2017
Abbreviated titleIGARSS 2017
Country/TerritoryUnited States of America
CityFort Worth
Internet address


  • disaggregation
  • evaporation
  • land surface temperature
  • SMOS
  • Soil moisture

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