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1 RESUMO A aplicacao do radar meteorologico em irrigacao vem tendo crescente desenvolvimento. O uso sinergico de informacoes de outros sensores destacando-se ai as de satelites meteorologicos, agrega valor significativo em muitos casos. A analise conjunta de imagens de satelites e radares meteorologicos permite correlacionar estruturas precipitantes observadas em ambas as imagens. Essa analise tornaria viavel a extensao do alcance de radares em meteorologicos em terra. Entretanto, alem das resolucoes espaciais e temporais diferentes dessas imagens, analise comparativa e dificultada devido a efeitos de rotacao, distorcao geometrica e aos diferentes formatos de dados, projecoes geograficas e sistemas de coordenadas. Neste trabalho, emprega-se uma abordagem baseada num filtro gaussiano adaptativo para comparacao dessas imagens. Os resultados estatisticos obtidos da comparacao sao confrontados com aqueles obtidos por outros metodos existentes. UNITERMOS: irrigacao, filtragem de imagens, radar meteorologico, satelite meteorologico GARCIA,J.V.C. 1 ; STEPHANY,S. 1 ; CALHEIROS,R.V. 2 ; D’OLIVEIRA,A.B. 3 AN ADAPTIVE GAUSSIAN FILTER FOR THE COMPARATIVE ANALYSIS OF IMAGES FROM METEOROLOGICAL RADAR AND SATELLITES. 2 ABSTRACT Meteorological satellite and radar data comparative analysis allows to correlate the precipitation structures observed in both images. Such analysis would make feasible the extension of the range of ground-based meteorological radars. In addition to the different spatial and temporal resolution of these images this comparative analysis presents difficulties due to the effects of rotation and distortion, besides the different formats, projections, and coordinate systems. This work employed an approach based on a Gaussian adaptive filter in order to compare such images. The statistical results obtained from the comparison of the images are matched to those produced by other methods. KEYWORDS: irrigation, image filtering, meteorological radar, meteorological satellite.

UM FILTRO GAUSSIANO ADAPTATIVO PARA ANÁLISE COMPARATIVA DE IMAGENS DE RADARES E SATÉLITES METEOROLÓGICOS