手持GPS在矿区地质勘查工作中的应用及误差分析

Application on the handheld GPS in the geological survey and its error analysis

为提高手持GPS接收机在矿区地质测量中的点位定位精度,在已知测量控制点上进行校正参数测定,在点上要求搜索到4颗以上卫星信号,定位时间5 min以上。利用矿区测量已知点与手持GPS接收机测量点坐标进行对比,经参数校准后,手持式GPS接收机单点定位精度优于±5 m,可满足矿区1∶2 000及1∶10 000等大中比例尺矿区地质测量及工程点位定位的精度要求。

In order to improve the point positioning accuracy of a handheld GPS receiver during the geological measurement in mining area, the GPS receiver needs to be calibrated before the measurment work start at the known centrol points under the situation that the signal should be searched from 4 satellites at least and the positioning time should be over 5 minutes. After the compare of both measurement point＇s coordinates, in mining area and in the parameter calibrated GPS receiver, the single point＇ s positioning accuracy of the GPS receiver is better than ± 5 m and this value can meet the point positioning accuracy requirement for the geological survey in the medium and large scale mining area such as 1：2 000 and 1：10 000.