@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 = "03 jun. 2024"
}