无约束静态GPS网三维坐标平差成果的精度  

The precision of the adjustment result of three-dimensional coordinatesin free-adjustment static GPS control nets

作　　者：裴毓铁 马熹肇 魏永强[3] 马小计 

机构地区：[1]长春市国土测绘院,长春130012 [2]北京中色测绘院有限公司,北京100012 [3]长春工程学院勘查与测绘工程学院,长春130012

出　　处：《矿产勘查》2011年第5期616-618,共3页Mineral Exploration

摘　　要：在静态GPS控制网平差中,数据处理软件通常附带给出各点在WGS84坐标参考框架下无约束的空间直角坐标平差结果,且精度极高。有些用户就将此成果作为WGS84坐标使用。为了验证此成果的实际精度,利用1个E级试验网,获取各点在WGS84坐标参考框架下无约束及有约束的空间直角坐标平差结果。两种坐标平差结果的比较表明,各点平均在X、Y、Z方向分别差6.333m、15.201m、6.635m,证明无约束平差获得的点位的WGS84坐标精度,仅相当于手持机测量的点位WGS84坐标精度。In the adjustment of static GPS control nets, the free - adjustment results of points spacial rectangular coordinates under the WGS84 coordinate reference frame are given by the data processing software in parenthesis, and their precision is very high. They are used as the WGS84 coordinate by some users. To verify their practical precision, an E - class test network is used, and the two kinds of results of the points spacial rectangular coordinates under the WGS84 coordinate reference frame are gained by free - adjustment and contained adjustment. Comparing the two kinds of coordinates of the points, it is indicated that the average D - values are 6.333m,15.201m,6. 635m on the X direction, Y direction and Z one respectively, and it is proved that the precision of the points WGS84 coordinates obtained by free - adjustment only amounts to the one of the points WGS84 coordinates measured by pocket GPS.

关 键 词：GPS网 无约束平差 有约束平差 精密单点定位 

分 类 号：P623.3[天文地球—地质矿产勘探]