【作者】 汪登辉； 高成发； 潘树国；

【Author】 Denghui WANG 1,Chengfa GAO 1,Shuguo PAN 2 1 School of Traffic and Transportation Engineering,Southeast University,Nanjing 210096,China;2 School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;

【机构】 东南大学交通学院； 东南大学仪器与工程学院；

【摘要】 在地形复杂,高程变化较大的地区,高程差异会对用户位置的对流层延迟估计产生很大影响。本文针对用户站、参考站间高程差异大的问题,提出了基于Niell的修正高程模型(HLCM),通过对对流层延迟特性的分析,根据Niell模型对高程差异进行修正,以达到平面内插的效果。根据重庆CORS实测数据处理,结果表明基于Niell的修正高程模型(HLCM)在精度方面明显高于常规内插模型,其中误差及平均误差值仅为1-2cm,达到厘米级定位精度,相比较常规模型2分米左右误差,提升了一个数量级,同时仅需3个参考站,适用于GPS/VRS参考站网络厘米级实时动态定位要求。更多还原

【Abstract】 In the complex terrain,elevation difference would have a huge influence on estimating the tropospheric delay for users.In view of the big elevation difference between users location and reference station,a model HLCM,considering elevation difference based on the modified Niell-Model,is presented in this paper.With the analysis of the characteristics of troposphere delay,elevation differences would be amended according to the Niell-Model,so that the plane interpolation effect can be achieved.Through comparative analysis of the tropospheric data in Chongqing CORS,it is concluded that the estimation precision of the new model is significantly higher than the result of the conventional interpolation models,which the root mean square error and mean error of HLCM is respectively in error 1-2 cm,ascending to a higher level than the conventional interpolation model in 2dm above.On the other hand,compared with LSM model using more than four reference stations,the new model with higher interpolated accuracy rely on using only three reference stations.更多还原