我国毫米级框架实现与维持发展现状和趋势

发布时间：2018-04-17 07:09

本文选题：CGCS + 坐标系统　；参考：《测绘学报》2017年10期

【摘要】：主要从技术实现和维持方面讨论了我国CGCS2000框架与当前ITRF框架的不同。随着空间技术的进步,特别是我国自主的北斗卫星第三代卫星将实现信号的全球覆盖,发展以北斗卫星为主的毫米级全球基准将是我国基准发展的未来目标。毫米级站点坐标涉及两个因素:一是地球质心变化反演;二是站点的非线性运动建模。本文就国际上采用的地心反演方法进行了讨论、分析、比较。非线性运动建模部分重点介绍了奇异谱非线性建模技术,此方法相比地球物理效应分析建模方法有很明显的优势,可为我国CGCS2000框架点非线性运动维持提供依据。
[Abstract]:This paper discusses the differences between CGCS2000 framework and current ITRF framework in terms of technical implementation and maintenance.With the development of space technology, especially the third generation satellite of Beidou satellite, the global coverage of signal will be realized, and the development of millimeter scale global datum based on Beidou satellite will be the future goal of the development of Chinese standard.The millimeter site coordinates involve two factors: one is the inversion of the earth's centroid change, the other is the nonlinear motion modeling of the station.This paper discusses, analyzes and compares the geocentric inversion methods adopted internationally.In the part of nonlinear motion modeling, the singular spectrum nonlinear modeling technique is introduced. This method has obvious advantages over geophysical effect analysis modeling method, and can provide the basis for nonlinear motion maintenance of CGCS2000 frame points in China.
【作者单位】：中国测绘科学研究院;
【基金】：国家重点研发计划(2016YFB0501405)~~
【分类号】：P227

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