CGCS2000框架维持方法分析  

CGCS2000 Maintain Methods Analysis

作　　者：成英燕[1] 党亚民[1] 秘金钟[1] 王虎[1] 邱荣海[1] 万军[1] CHENG Yingyan DANG Yamin BEI Jinzhong WANG Hu QIU Ronghai WAN Jun(Chinese Academy of Surveying and Mapping, Beijing 100830, China)

机构地区：[1]中国测绘科学研究院,北京100830

出　　处：《武汉大学学报（信息科学版）》2017年第4期543-549,共7页Geomatics and Information Science of Wuhan University

基　　金：国家重点研发项目(2016YFB0501405);国家自然科学基金(41374014);国家863计划(2013AA122501);中国测绘科研研究院基本科研业务费(7771503)~~

摘　　要：针对目前国内各GNSS应用在归算到2000国家大地坐标系(CGCS2000)时常采用强制符合及拟稳平差方法存在的问题及局限性,利用国家测绘地理信息局收集的全国近1 800个连续运行参考站(Continuously Operating Reference Stations,CORS)连续观测1个月的数据进行数据处理得到的基线解,分别基于强基准拟稳平差方式及顾及板块运动的速度场归算方法获得测站在CGCS2000下的坐标,分析两者的差异及误差分布情况,指出对于省级CORS站纳入CGCS2000的情况,采用强制符合拟稳平差方法所基于的基准站必须考虑板块的运动趋势进行CGCS2000归算,否则平差结果与CGCS2000最大差异将达到dm量级。As an existing method, Quasi_Stable Adjustment which is often used to align local CORS position to CGCS2000 at present, has some limitation. This paper focuses on studying the methods of calculating the real position of GPS stations at the reference epoch of CGCS2000 from GPS observa- tions obtained from various observing times, two methods are introduced here. One is to align the po- sition of GNSS stations to CGCS2000 through adjustment with coordinates of CGCS2000 reference stations constrained tightly, while the other method is to transform the coordinates of the GNSS sta- tions to CGCS2000 through their velocities. In order to demonstrate the difference between these two methods, nearly 1800 CORS＇s observations about one month collected from 30 provinces in China were processed and transformed with the two methods. The conclusion derived from the results analy- sis shows that the maximum transformed difference between Quasi_Stable Adjustment and CGCS2000 will be din.

关 键 词：CGCS2000 框架维持 拟稳平差 速度场 

分 类 号：P228[天文地球—大地测量学与测量工程]