Second International Conference on Space Information Technology [electronic resource] : 10-11 November 2007, Wuhan, China / Cheng Wang, Shan Zhong, Jiaolong Wei, editors ; organized by Huazhong University of Science and Technology (China) ; sponsored by Huazhong University of Science and Technology, the Second Academy of China Aerospace and Industry Corporation (China) ; cosponsored by the National Natural Science Foundation of China (China) [and others].