GPS网WGS-84起算点坐标的来源分析  

Analysis of the Sources of WGS-84 Origin Point Coordinate of GPS Network

作　　者：康世英 杨春华 

机构地区：[1]江苏华东地质调查(集团)有限公司,江苏南京210007

出　　处：《地矿测绘》2012年第2期4-7,共4页Surveying and Mapping of Geology and Mineral Resources

摘　　要：GPS控制网在执行无约束平差时需要一个具有较精确WGS-84坐标的点,另外求解WGS-84坐标系与当地坐标系的坐标转换参数需要多个控制点同时具有两套坐标系坐标。据此,介绍了获得GPS网点起算点WGS-84坐标的途径和方法,分析比较了超快速星历和最终星历对定位精度的影响。通过对实例数据解算精度的分析,得出一些有益的结论,为工程实际应用提供参考。GPS control network in the implementation of the unconstrained adjustment requires a more superior pre- cise point with WGS-84 coordinates, and solution WGS-84 coordinate system and local coordinate system transformation parameters requires multiple control points, and has two sets of coordinate systems, too. This article describes the various ways and methods to obtain the origin points＇ WGS-84 coordinates of the GPS network, analyzes and compares the impact of positioning accuracy between Ultra-fast and final ephemeris. By calculation on instance data and precision analysis, the paper abstracted some relevant conclusions which are useful references for the practical application of the engineer- ing.

关 键 词：GPS网 长基线 单点定位 WGS-84坐标系 坐标转换 超快速星历 广播星历 最终星历 

分 类 号：P228.4[天文地球—大地测量学与测量工程]