GAMIT/GLOBK数据解算误差影响分析

采用GAMIT/GLOBK进行高精度GPS控制网静态数据处理,通过不同方案设计对比分析解算过程中各参数和不同误差改正模型的差异。结果表明:不同基线类型应采用不同的基线解算模式,解算精度随对流层参数个数的增加而降低,且基准站概略坐标误差不宜大于7 m。另外,验证了海潮负荷对沿海测站的影响要大于内陆测站,数据解算时采用GMF映射函数模型和IERS10规范中的固体潮模型即可。

Analysis on the influence of GAMIT/GLOBK calculation error

GAMIT/GLOBK was used to process the static data of the high-precision GPS control network.Differences of parameters and the error correction models were compared and analyzed through the different scheme designs in the process of solution.Results showed that:the different baseline solution modes should be adopted in the different baseline types,the accuracy of the solution decreased with the increase of the number of the tropospheric parameters,and the error of the approximate coordinate of the reference station should not be greater than 7 m.In addition,it was verified that the influence of the ocean tide load on the coastal stations was greater than the inland stations.GMF mapping function model and the earth tide model in IERS10 specification could be used for the data calculation.