引用本文: 蒋志浩, 刘经南, 王凡, 秘金钟, 翟曦. 全球CGCS2000坐标框架的构建理论研究[J]. 武汉大学学报 ( 信息科学版), 2018, 43(2): 167-174.
JIANG Zhihao, LIU Jingnan, WANG Fan, BEI Jinzhong, ZHAI Xi. Research on Construction Theory of Global CGCS2000 Coordinate Frame[J]. Geomatics and Information Science of Wuhan University, 2018, 43(2): 167-174.
 Citation: JIANG Zhihao, LIU Jingnan, WANG Fan, BEI Jinzhong, ZHAI Xi. Research on Construction Theory of Global CGCS2000 Coordinate Frame[J]. Geomatics and Information Science of Wuhan University, 2018, 43(2): 167-174.

## Research on Construction Theory of Global CGCS2000 Coordinate Frame

• 摘要: 全球坐标参考框架是发展全球卫星导航系统最具重要性的基础设施之一，也是我国空间信息基础设施建设的迫切需求。研究了构建全球CGCS2000（China Geodetic Coordinate System 2000）坐标参考框架的数学模型，研究了采用内约束理论构建全球CGCS2000框架理论和算法，最后证明了构建全球CGCS2000框架的二步法和一步法数学模型在一定条件下等价。内部约束算法根据框架转换参数及其速率变化量最小标准重新定义框架约束条件，经过坐标相似变化得到最佳网形，并保证最佳网形和初始网形的拟合度达到最高，最后得到最优网形中测站坐标估值，并能保持不同观测技术参考框架的内在纯粹性，发挥不同观测技术优势。本文研究结果可完善中国坐标框架构建基础理论体系，对CGCS2000框架的全球化实现提供科学方法。

Abstract: The global coordinate reference frame is one of the most important infrastructures for the development of global satellite navigation system, but also an urgent demand in China's construction of spatial information facilities. This paper focuses on the mathematical model for a Global CGCS2000 Coordinate Frame, analyzes the theory and algorithm of the inner constraints required for Global CGCS2000 Coordinate Frame formulation, and shows that under certain conditions, a two-step method and one-step method are identical. The Inner constraints algorithm redefines the constraint conditions of the coordinate reference frame according to minimum standard for parameter transformation and its rate. Coordinate similarity transformation yields an adjusted network, which ensures the highest degree of fit with the initial network shape, maintaining the coordinate network from the effects of different observation technologies. The results of this study can deepen the theoretical foundations of coordinate frame determination, and provides a scientific method for the realization of the CGCS2000 globalization.

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