An advanced scanning method for space-borne hyper-spectral imaging system

Yue-ming Wang; Jun-Wei Lang; Jian-Yu Wang; Zi-Qing Jiang

doi:10.1117/12.902424

15 August 2011 An advanced scanning method for space-borne hyper-spectral imaging system

Yue-ming Wang, Jun-Wei Lang, Jian-Yu Wang, Zi-Qing Jiang

Proceedings Volume 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications; 819626 (2011) https://doi.org/10.1117/12.902424
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Space-borne hyper-spectral imagery is an important means for the studies and applications of earth science. High cost efficiency could be acquired by optimized system design. In this paper, an advanced scanning method is proposed, which contributes to implement both high temporal and spatial resolution imaging system. Revisit frequency and effective working time of space-borne hyper-spectral imagers could be greatly improved by adopting two-axis scanning system if spatial resolution and radiometric accuracy are not harshly demanded. In order to avoid the quality degradation caused by image rotation, an idea of two-axis rotation has been presented based on the analysis and simulation of two-dimensional scanning motion path and features. Further improvement of the imagers' detection ability under the conditions of small solar altitude angle and low surface reflectance can be realized by the Ground Motion Compensation on pitch axis. The structure and control performance are also described. An intelligent integration technology of two-dimensional scanning and image motion compensation is elaborated in this paper. With this technology, sun-synchronous hyper-spectral imagers are able to pay quick visit to hot spots, acquiring both high spatial and temporal resolution hyper-spectral images, which enables rapid response of emergencies. The result has reference value for developing operational space-borne hyper-spectral imagers.

Citation Download Citation

Yue-ming Wang, Jun-Wei Lang, Jian-Yu Wang, and Zi-Qing Jiang "An advanced scanning method for space-borne hyper-spectral imaging system", Proc. SPIE 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, 819626 (15 August 2011); https://doi.org/10.1117/12.902424

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