Universitat Politècnica de Catalunya
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai
2018
After more than 8 years in orbit the Soil Moisture and Ocean Salinity (SMOS) satellite is still in good health and several algorithms for improving its spatial resolution have been proposed and validated in a variety of catchments. However, none of them has yet been applied at the global scale. In this article we present: i) a review of the latest SMOS-BEC downscaling algorithm, which allows for its global application using an adaptive moving window and ii) a thorough validation of the resulting maps over two in-situ networks: REMEDHUS in Spain and OzNet in Australia. The proposed algorithm combines SMOS brightness temperatures (at ~40 km spatial resolution), and MODIS-derived Land Surface Temperature and Normalized Differenced Vegetation Index (at 1 km), into 1km soil moisture maps. This paper also presents a variant of the algorithm, which allows for cloud-free retrievals. A statistical comparison has been carried out when the MODIS Land Surface Temperature is replaced in the algorithm by the one provided by the ERA5 reanalysis. Fine-scale estimates show good agreement in terms of correlation and root-mean-squared error with in-situ soil moisture.
Peer Reviewed
Postprint (published version)
Conference report
English
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció; Àrees temàtiques de la UPC::Enginyeria agroalimentària::Ciències de la terra i de la vida::Edafologia; Remote sensing; Soil moisture; Soil moisture; SMOS; Downscaling; Adaptive moving window; In-situ stations; ERA5; Teledetecció; Sòls -- Humitat
Institute of Electrical and Electronics Engineers (IEEE)
https://ieeexplore.ieee.org/document/8518129
info:eu-repo/grantAgreement/MINECO//ESP2015-67549-C3-1-R/ES/PRODUCTOS Y SERVICIOS INNOVADORES CON SENSORES DE MICROONDAS, SMOS Y SENTINELS PARA TIERRA/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-89463-C3-2-R/ES/SOBRE LA CONTINUIDAD DE LAS MISIONES SATELITALES DE BANDA L: NUEVOS PARADIGMAS EN PRODUCTOS Y APLICACIONES/
info:eu-repo/grantAgreement/MINECO/1PE/MDM-2016-0600
Restricted access - publisher's policy
E-prints [72986]
