Quality assessment of PROBA-V LAI, fAPAR and fCOVER collection 300 m products of copernicus global land service
Fuster, Beatriz (Parc Cientific University of Valencia. Earth Observation Laboratory)
Sánchez-Zapero, Jorge (Parc Cientific University of Valencia. Earth Observation Laboratory)
Camacho, Fernando (Parc Cientific University of Valencia. Earth Observation Laboratory)
García-Santos, Vicente (Parc Cientific University of Valencia. Earth Observation Laboratory)
Verger, Aleixandre (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Lacaze, Roselyne (HYGEOS (Lille, França))
Weiss, Marie (Institut National de la Recherche Agronomique (França))
Baret, Frédéric (Institut National de la Recherche Agronomique (França))
Smets, Bruno (Vlaamse Instelling voor Technologisch Onderzoek)

Data:	2020
Resum:	The Copernicus Global Land Service (CGLS) provides global time series of leaf area index (LAI), fraction of absorbed photosynthetically active radiation (fAPAR) and fraction of vegetation cover (fCOVER) data at a resolution of 300 m and a frequency of 10 days. We performed a quality assessment and validation of Version 1 Collection 300 m products that were consistent with the guidelines of the Land Product Validation (LPV) subgroup of the Committee on Earth Observation System (CEOS) Working Group on Calibration and Validation (WGCV). The spatiotemporal patterns of Collection 300 m V1 LAI, fAPAR and fCOVER products are consistent with CGLS Collection 1 km V1, Collection 1 km V2 and Moderate Resolution Imagery Spectroradiometer Collection 6 (MODIS C6) products. The Collection 300 m V1 products have good precision and smooth temporal profiles, and the interannual variations are consistent with similar satellite products. The accuracy assessment using ground measurements mainly over crops shows an overall root mean square deviation of 1. 01 (44. 3%) for LAI, 0. 12 (22. 2%) for fAPAR and 0. 21 (42. 6%) for fCOVER, with positive mean biases of 0. 36 (15. 5%), 0. 05 (10. 3%) and 0. 16 (32. 2%), respectively. The products meet the CGLS user accuracy requirements in 69. 1%, 62. 5% and 29. 7% of the cases for LAI, fAPAR and fCOVER, respectively. The CGLS will continue the production of Collection 300 m V1 LAI, fAPAR and fCOVER beyond the end of the PROBA-V mission by using Sentinel-3 OLCI as input data.
Ajuts:	European Commission 311766
Nota:	Altres ajuts: this research was funded by European Commission/Joint Research Centre under the Framework Service Contract N◦199494 of the Copernicus Global Land Service.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Leaf area index ; Fraction of absorbed photosynthetically active radiation ; Fraction of vegetation cover ; Validation ; PROBA-V ; Copernicus Global Land Service
Publicat a:	Remote sensing (Basel), Vol. 12, issue 6 (March 2020) , art. 1017, ISSN 2072-4292

DOI: 10.3390/rs12061017

29 p, 6.0 MB

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