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Study of high frequency measurements from the MesuRho mooring ArchiMer
Fuchs, Rosalie; Pairaud, Ivane.
The high frequency MesuRho station, part of the MAREL network and located at the mouth of the Rhone River is presented. Measures sometimes show bias signs, drift or double, so that a graphical interface was implemented to quickly visualize data and eventually correct them. Original data set and corrected data for 2009-2013 are presented, the methods of corrections provided are detailed. Finally an example of a storm event study (under strong south east wind) between the 4th and the 7th of March 2013 is presented and some prospects to improve data management are proposed.
Tipo: Text Palavras-chave: MesuRho; Code qualité; Correction des données; Analyse et traitement de données; Filtrage; ACP; Fourier; Évènement de vent d'Est; MesuRho; Quality code; Data corrections; Data and treatments analysis; Filtering; PCA; Fourier; Storm event.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00226/33697/32082.pdf
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Cropland area estimates using Modis NDVI time series in the state of Mato Grosso, Brazil PAB
Victoria,Daniel de Castro; Paz,Adriano Rolim da; Coutinho,Alexandre Camargo; Kastens,Jude; Brown,J. Christopher.
The objective of this work was to evaluate a simple, semi‑automated methodology for mapping cropland areas in the state of Mato Grosso, Brazil. A Fourier transform was applied over a time series of vegetation index products from the moderate resolution imaging spectroradiometer (Modis) sensor. This procedure allows for the evaluation of the amplitude of the periodic changes in vegetation response through time and the identification of areas with strong seasonal variation related to crop production. Annual cropland masks from 2006 to 2009 were generated and municipal cropland areas were estimated through remote sensing. We observed good agreement with official statistics on planted area, especially for municipalities with more than 10% of cropland cover (R²...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cropland masks; Cultivated area; Fourier; Vegetation index.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000900012
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