Exterior orientation of CBERS-2B imagery using multi-feature control and orbital data |
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| Affiliation: | 1. Centro de Ciências Exatas e Tecnologia – CCET, UFMS – Universidade Federal de Mato Grosso do Sul, Campus Universitário, 79070-900 Campo Grande, Brazil;2. Department of Cartography, UNESP – Univ Estadual Paulista, Rua Roberto Simonsen 305, 19060-900 Presidente Prudente, Brazil;1. Centre for Excellence in Signal and Image Processing, University of Strathclyde, Glasgow, United Kingdom;2. Department of Audiovisual Arts, Ionian University, Corfu, Greece;3. School of Computer Software, Tianjin University, China;4. School of Computer Software and Microelectronics, Northwestern Polytechnical University, Xi’an, China;5. School of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China;1. Research Institute of Photonics, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi District, Dalian 116034, China;2. Research Center for Space Optical Engineering, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China;1. Research Department of Information Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China;2. School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China |
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| Abstract: | The major contribution of this paper relates to the practical advantages of combining Ground Control Points (GCPs), Ground Control Lines (GCLs) and orbital data to estimate the exterior orientation parameters of images collected by CBERS-2B (China–Brazil Earth Resources Satellite) HRC (High-resolution Camera) and CCD (High-resolution CCD Camera) sensors. Although the CBERS-2B is no longer operational, its images are still being used in Brazil, and the next generations of the CBERS satellite will have sensors with similar technical features, which motivates the study presented in this paper. The mathematical models that relate the object and image spaces are based on collinearity (for points) and coplanarity (for lines) conditions. These models were created in an in-house developed software package called TMS (Triangulation with Multiple Sensors) with multi-feature control (GCPs and GCLs). Experiments on a block of four CBERS-2B HRC images and on one CBERS-2B CCD image were performed using both models. It was observed that the combination of GCPs and GCLs provided better bundle block adjustment results than conventional bundle adjustment using only GCPs. The results also demonstrate the advantages of using primarily orbital data when the number of control entities is reduced. |
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| Keywords: | Pushbroom Satellite Orientation Triangulation Straight lines |
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