三级GPS大地控制网数据处理的改进与优化

IMPROVEMENT AND OPTIMIZATION OF THIRD-ORDER GPS GEODETIC NETWORK DATA PROCESSING

运用三级GPS网观测数据,探讨利用三级GPS网数据处理得到的松弛解与基准网数据进行平差解算对三级网数据处理结果整体性的改善情况。采用最小曲率网格内插法拟合点位地壳运动速度与利用测区平均速度方法对三级GPS网点位坐标历元归算进行了计算对比,结果证实,采用最小曲率法、克里金法等高精度内插方法得到每个点的地壳运动速度,在点位历元归算时,可以有效减小由速度带来的误差。

Coupling with the data processing of Third-Order GPS Geodetic Network, unified adjustment is done using loose resolution obtained by Third-Order GPS Geodetic Network data processing and station network data. The improvement in coincidence of results was discussed. Minimum curvature grid interpolation method were used to calculate horizontal velocity field, of which the results were better comparing with the method of average velocity in district. High-precision velocity field can reduce error in epoch reduction process.