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作 者: Xue Rui Zhang Jun Zhu Yanbo 作者单位: School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China 刊 名: 中国航空学报(英文版) ISTIC 英文刊名: CHINESE JOURNAL OF AERONAUTICS 年,卷(期): 2009 22(1) 分类号: V2 关键词: global positioning system ionosphere measurement errors evaluation estimation