基于TBC与GAMIT的多余长基线对高精度CORS数据解算精度分析

Accuracy analysis of high precision CORS data calculation based on redundant long baselines of TBC and GAMIT

为探讨多余长基线对CORS数据解算精度的影响,以广西地区的CORS基准站为例,选择了7个连续年积日不同观测时间段的CORS观测数据,同时引入IGS站形成多余长基线。结合生产实践,分别采用商业软件TBC和科研软件GAMIT对CORS数据进行处理,以定量分析两种不同解算模式在不同观测时间段中多余长基线对高精度CORS数据解算精度的影响。结果表明,无论采用TBC或GAMIT,多余长基线都会对高精度CORS数据解算精度产生影响,且观测时长较短时,影响尤为明显;随着观测时间增加,影响逐渐减小。在软件解算质量方面,TBC的解算精度略低于GAMIT的解算精度。TBC作为一款商用软件,其操作简便且界面实体化,基线解算精度与GAMIT差异不大,在实际生产应用方面有一定的优势。

In order to explore the influence of redundant long baselines on the calculation accuracy of CORS data,this paper took CORS reference station in Guangxi region as an example,selected 7 CORS observation data in different periods of continuous annual product days,and introduced IGS station to form redundant long baselines.In combination with production practice,commercial software TBC and scientific research software GAMIT were used to process CORS data,respectively,in order to quantitatively analyze the influence of redundant long baselines in two different calculation modes on the calculation accuracy of high-precision CORS data in different periods.The results show that whether TBC or GAMIT is adopted,the redundant long baseline will have an impact on the calculation accuracy of high-precision CORS data,and the effect is particularly obvious when the observation time is relatively short.As the observation time increases,the influence decreases gradually.In terms of software solution quality,TBC solution precision is slightly lower than GAMIT solution precision.As a commercial software,TBC is easy to operate and has a materialized interface.The accuracy of baseline calculation is not different from that of GAMIT,so it has certain advantages in practical production and application.