网络RTK对流层改正数高程方向偏差修正

The Modification of Tropospheric Correction Bias in Vertical Direction in Network RTK

在分析参考站网各基线上对流层延迟信息性质的基础上,提出一种修正流动站对流层改正数高程方向偏差的方法,利用高程信息对流动站对流层改正数高程方向偏差进行修正。采用美国CORS网的6个参考站及香港SatRef网的7个站观测数据进行实验分析。结果表明,该方法能有效修正流动站对流层改正数在高程方向上的偏差,在100m以上高程差异条件下取得良好效果,使对流层改正数精度维持在cm级。

We propose a new method which modifies users' tropospheric corrections based on the height information of stations and users.We use data from six CORS stations in America and seven stations in the SatRef network in Hong Kong to analyze our method.Results show the method can modify tropospheric correction bias in vertical directions effectively,that the method performs well while the elevation difference is above 100 m,bringing the precision of tropospheric correction to the cm level.