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˚, 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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
