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@Article{DiasNetoThomUrba:2016:MéAjMa,
               author = "Dias Neto, Jos{\'e} and Thomaz J{\'u}nior, Jos{\'e} Celso and 
                         Urbano Neto, Domingos Fernandes",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "M{\'e}todo de ajuste matem{\'a}tico para valida{\c{c}}{\~a}o 
                         de dados de sensores de radia{\c{c}}{\~a}o de onda longa",
              journal = "Revista Brasileira de Meteorologia",
                 year = "2016",
               volume = "31",
               number = "1",
                pages = "37--44",
                month = "jan./mar.",
             keywords = "Longwave radiation, Pyrgeometer, radia{\c{c}}{\~a}o de onda 
                         longa, pirge{\^o}metro.",
             abstract = "Hereby is presented a methodology to correct observations of 
                         Downwelling Longwave Radiation (DLR) generated by surface 
                         stations. It consists in the application of the least squares 
                         method to find coefficients (ks) of PIR Eppley (EP) and CGR4 Kipp 
                         \& Zonen (KZ) sensors, and reprocessing of time series. The 
                         evaluation of the methodology used data obtained in an experiment 
                         conducted in the Meteorological Instrumentation Laboratory - CPTEC 
                         / INPE. The application of statistical tests in the data series, 
                         with and without correction shows a significant reduction of the 
                         Root Mean Square Error, which went from 9,02 to 0,43 W/m2 for the 
                         EP sensor and 4,11 to 1,21 W / m2 for KZ; bias decreased from 0,50 
                         to \−7,99 W/m2 (EP) and 3,53 to 0,27 W/m2 (KZ). A CG4 
                         sensor (KZ) of the calibrated reference 
                         Physikalisch-Meteorologiches Observatorium Davos (PMOD) with 
                         traceability was used. RESUMO: Uma metodologia para corrigir 
                         observa{\c{c}}{\~o}es de Radia{\c{c}}{\~a}o de Onda Longa 
                         Descendente (OLD) geradas por esta{\c{c}}{\~o}es de 
                         superf{\'{\i}}cie {\'e} apresentada. Consiste na 
                         aplica{\c{c}}{\~a}o do m{\'e}todo de m{\'{\i}}nimos quadrados 
                         para encontrar coeficientes (ks) espec{\'{\i}}ficos de sensores 
                         PIR Eppley (EP) e CGR4 Kipp \& Zonen (KZ) e reprocessamento das 
                         s{\'e}ries temporais. A avalia{\c{c}}{\~a}o da metodologia 
                         utilizou dados obtidos de um experimento realizado no 
                         Laborat{\'o}rio de Instrumenta{\c{c}}{\~a}o Meteorol{\'o}gica 
                         - CPTEC/INPE. A aplica{\c{c}}{\~a}o de testes 
                         estat{\'{\i}}sticos na s{\'e}rie de dados, com e sem 
                         corre{\c{c}}{\~a}o, mostra uma redu{\c{c}}{\~a}o significativa 
                         da Raiz do Erro Quadr{\'a}tico M{\'e}dio, que passou de 9,02 a 
                         0,43 W/m2 para o sensor EP e de 4,11 a 1,21 W/m2 para o KZ; o 
                         vi{\'e}s reduziu de \−7,99 para 0,50 W/m2 (EP) e de 3,53 
                         para 0,27 W/m2 (KZ). Um sensor CG4 (KZ) de refer{\^e}ncia 
                         calibrado no Physikalisch-Meteorologiches Observatorium Davos 
                         (PMOD), com rastreabilidade foi utilizado.",
                  doi = "10.1590/0102-778620140022",
                  url = "http://dx.doi.org/10.1590/0102-778620140022",
                 issn = "0102-7786",
             language = "en",
           targetfile = "dias_metodo.pdf",
        urlaccessdate = "26 nov. 2020"
}


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