Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/63524
Type: Artigo de periódico
Title: DTM generation from a stereo pair acquired by the China-Brazilian Earth Resources Satellite (CBERS-2) and quality control of the altimetric information
Author: Zanardi, RP
Rolim, SBA
De Souza, SF
Maranhao, MRA
De Souza, CR
Abstract: The CBERS (China-Brazilian Earth Resources Satellite) program comprised a bilateral collaboration between Brazil and China for the development, construction and launch of at least two remote sensing satellites on a sun-synchronous, 778 km orbit, carrying onboard three imaging systems (High Resolution Charge Coupled Device (HR-CCD) Camera; infrared multispectral scanner IRMSS and wide field imager (WFI)). CBERS-1 and CBERS-2 were launched in October 1999 and October 2003, respectively, and acquired data using a similar technical structure, space mission and payload. The CCD camera provides images with 113 km swath, 20 m spatial resolution and has a sideways pointing capability of +/- 32 degrees, which makes possible the acquisition of stereoscopic images. This research focused on the extraction of altimetric information from a stereo pair acquired by the CBERS-2's HR-CCD Camera, using digital photogrammetry techniques. Additionally, a quantitative precision and accuracy analysis of the altimetric information was carried out. Tests showed a root mean square error (RMSE) value of 38 m in the computed digital terrain model (DTM) against test points extracted from existing elevation data. The correction of such bias decreased the RMSE to 27 m. Considering Brazilian Cartographic Accuracy Standards (BCAS), this altimetric information can be used for Class A cartographic documents at scales up to 1:250 000.
Country: Inglaterra
Editor: Taylor & Francis Ltd
Rights: fechado
Identifier DOI: 10.1080/01431161.2010.508880
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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