基于GAMIT/GLOBK的高精度管道工程控制网解算

The High-Precision Solution of Pipeline Control Network by GAMIT/GLOBK

为讨论基于GAMIT／GLOBK的高精度管道工程控制网解算，论述了基线解算、平差及精度评定的过程及结果。在控制网中按40～60km间隔选取11个点进行长时间观测，联合7个IGS参考站连续观测数据，利用GAMIT／GLOBK对观测的GPS基线进行精密处理，然后以松弛约束法和开尔曼滤波迭代计算11个点的高精度坐标，以获得的坐标作为起算数据，对整个管道工程控制网进行整体平差。精度分析结果表明，利用GAMIT／GLOBK解算的起算点精度达到毫米级水平，控制网整体平差结果的精度高于三等GPS控制网精度要求。基于GAMIT／GLOBK的高精度管道工程控制网解算可作为一种有效的备用技术手段在将来的工程中推广。

This paper aims to discuss the GAMIT / GLOBK-based method for high-precision pipeline engineering control network solution.The process and result of baseline solution,adjustment and precision evaluation are discussed.Base line of 11 long time GPS static observations were processed at the interval of 40-60 km,combined with observation data of 7 IGS reference stations.The loosely constrained algorithm and Kalman filtering were adopted to calculate the accurate coordinates of the 11 points,which were soon afterward used as control points to conduct an adjustment to the entire network.The accuracy analysis results show that the accuracy of Reference points processed by GAMIT/GLOBK can reach millimeter level,and the accuracy of the control network can even be more precise than limit requirements of C class GPS control network.The high-precision solution of pipeline control network by GAMIT/GLOBK can be used as effective technical means in future projects.