高速铁路CP0数据处理中对流层参数估计分析

Analysis of Tropospheric Parameter Estimation in Data Processing of High-speed Railway CP0

GAMIT在高速铁路CP0数据处理中对流层延迟参数估计通常采用分段线性法对对流层延迟改正,因此,分析对流层参数估计的时间间隔对CP0数据处理结果是有必要的。本文为分析合理的参数估计时间间隔,通过采用GAMIT10.60在不同的数据处理方案下对高速铁路框架控制网进行基线解算且使用TGPPS进行网平差,以标准化的均方根误差、基线重复性、网平差等指标对数据处理结果进行精度分析。实验表明,按6h时间间隔设置对流层天顶延迟估计参数数据处理结果最好,有利于提高框架控制网CP0网平差的精度。

GAMIT tropospheric delay parameter estimation in CP0 data processing of high-speed railway generally a- dopts piecewise linear method to correct tropospheric delay. Therefore, it is necessary to analyze the time interval of tropospheric parameter estimation for CP0 data processing. In order to analyze the reasonable time interval for param- eter estimation, Baseline solution of high-speed railway control network under different data processing schemes using GAMIT10.60 and network adjustment using TGPPS, standardize the root mean square error, baseline repeatability, network adjustment, and other index for the results of precision analysis. The experimental results show that the trop- ospheric zenith delay estimation parameter data processing results are best at the 6h interval, which is beneficial to im- prove the accuracy of the CP0 network adjustment of the framework control network.