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		<issn>0101-9082</issn>
		<label>8975</label>
		<citationkey>SantosParaVeneMora:1999:AvGePr</citationkey>
		<title>A estereoscopia com imagens Radarsat-1: uma avaliacao geologica na provincia Mineral de Carajas</title>
		<year>1999</year>
		<secondarydate>20010301</secondarydate>
		<month>dec.</month>
		<secondarytype>PRE PN</secondarytype>
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		<author>Santos, Athos Ribeiro dos,</author>
		<author>Paradella, Waldir Renato,</author>
		<author>Venezziani, Paulo,</author>
		<author>Morais, Maria Carolina de,</author>
		<group>DSR-INPE-MCT-BR</group>
		<journal>Geociências</journal>
		<volume>29</volume>
		<number>4</number>
		<pages>627-632</pages>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
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		<keywords>GEOLOGIA, PROVINCIA MINERAL DE CARAJASSERRA DE CARAJAS, ESTEREOSCOPIA, IMAGEM DE RADAR, RADARSAT 1, SAR, RADAR DE ABERTURA SINTETICA, RESERVA MINERAL.</keywords>
		<abstract>This paper discusses the concept of SAR stercoscopy and related aspects. Different from optical stercoscopy, a balance has to be achieved between geometric disparity (parallax)and radiometric similarity (stereo viewability)when dealing with SAR stereoscopy. Several authors still discuss the stereo radar depth perception under specific conditions of terrain relief and stereo configuration. Results from RADARSAT-1 standard images are presented for the Carajas Mineral Province based on the analysis ofsix stereo pairs collected under distinct beam positions (S5, S6, S7)and illumination azimuth angles (78 and 282 degree). The geological performance of the stereo pairs was evaluated as a function of distinct types of terrain relief/geology. The results of this research have shown that an effective applicability of the radar stereoscopy is obtained only when aspects of the SAR stereo background and the photointerpreter's experience are taken into account. RESUMO: Este trabalho discute os conceitos relacionados a estereoscopia de radar e os aspectos que a influenciam. Diferentemente da estereoscopia optica, a de radar necessita que se busque um equilibrio entre as diferencas geometricas (paralaxes)e as similaridades radiometricas; (visibilidade estereoscopica)das cenas do par. Alguns autores ainda discutem o nivel de aplicabilidade da estercoscopia de radar, devido as dificuldades de percepcao de profundidade, sob certas condicoes de relevo do terreno e de geometria de iluminacao das cenas do par. Sao apresentados os resultados obtidos na regiao da Provincia Mineral de Carajas, atraves da analise de seis pares estereoscopicos, formados por imagens RADARSAT-1, em diferentes modos Standard (S5 S7 e S7 e azimutes de iluminacao (78 e 282'). Os pares foram avaliados em diferentes tipos de relevo/geologia. Os resultados demonstraram a efetiva contribuicao e aplicabilidade da esteremirolfia de quando sao aspectos que a influenciam e a experiencia do interprete neste tipo de abordagem.</abstract>
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