摘要
控制基准的质量是影响GPS定位成果的一项重要因素,为保证GPS成果的精度,在最终网平差之前必须对控制基准进行检核。本文以南水北调中线工程中的某段数据为例进行了验证。结果表明,控制基准对GPS定位成果精度的影响可用基准点的误差来描述,基准点的误差可以通过平差后的PVV值以及基线边长误差的变化显著地表现出来,从而避免选择误差较大的网点作为基准,最终保证GPS定位成果的精度。这对于实践中的GPS数据处理工作具有重要的参考价值,可为选择合理的控制基准提供借鉴。
The equality of control datum is an important impact which affects the GPS positioning results. It is essential to check the control datum before GPS network adjustment to ensure final GPS precision. This paper took series of data of South-to-North Water Diversion Project as an example verified. The results show that the effects on GPS positioning precision can be described through the error of the datum,and the error can be showed by the PW value and the change of the baseline length error,thus we can avoid choosing the gross datum or the incompatibilities datum and finally ensure the precision of GPS. It has important reference value for the practice of GPS data processing and to select reasonable datum.
出处
《城市勘测》
2014年第4期85-87,共3页
Urban Geotechnical Investigation & Surveying
关键词
GPS
控制基准
网平差
误差调整
检核与评定
GPS
control datum
network adjustment
error adjustment
check and evaluate
