基于TBC4.1软件的高速铁路CP0框架控制网基线解算与网平差精度分析

针对天宝公司研发的新版本TBC4.1软件在高速铁路CP0框架控制网基线解算与网平差的可行性问题,以京沪高速铁路CP0框架控制网作为研究对象,将最新版TBC4.1软件与GAMIT10.7软件、旧版本TBC3.5软件的基线解算能力进行比较,并与Cosa GPS软件的网平差精度进行对比,用试验的方法讨论TBC4.1软件加载不同类型卫星星历对不同基线长度高速铁路CP0框架控制网的基线解算与网平差精度。结果表明:TBC4.1软件较旧版本TBC3.5软件在长基线解算能力上得到了很大的提高;在处理800 km范围内的高速铁路CP0框架网基线时,TBC4.1软件获得与GAMIT10.7软件相当的解算精度,且不受精密星历种类的限制;当CP0框架网的基线长度由800 km扩大至1 500 km时,TBC4.1软件加载最终星历的基线解算精度仍能与GAMIT10.7的解算精度保持一致;TBC4.1软件网平差模块的处理精度为毫米级,且不受精密星历种类解算的基线结果限制。

Baseline Solution and Network Adjustment Accuracy Analysis of High Speed Railway CP0 Frame Control Network Based on TBC4.1 Software

Aiming at the feasibility of the new version TBC4.1 software developed by Trimble Company for the baseline solution and network adjustment of high-speed railway CP0 frame control network, the CP0 frame control network of the Beijing-Shanghai high-speed railway is taken as the research object. Based on the comparison of the baseline resolution capability of the latest version of TBC4.1 software with that of GAMIT10.7 software and old version of TBC3.5 software, and on the comparison of the network adjustment accuracy of TBC4.1 software with that of Cosa GPS software, the baseline solution and network adjustment accuracy of different types of satellite ephemeris for the high-speed railway CP0 frame control network with different baseline lengths are discussed with the experimental method. The results show that, the TBC4.1 software has greatly improved the long baseline solution ability of the older version of the TBC3.5 software. In processing the baseline of the high-speed railway CP0 frame network within 800 km, the TBC4.1 software achieves a solution accuracy comparable to the GAMIT10.7 software, and is not limited by the type of precision ephemeris. When the baseline length of the CP0 frame network is expanded from 800 km to 1 500 km, the baseline resolution accuracy of the final ephemeris loaded by TBC4.1 software can still be consistent with that of the GAMIT10.7. The processing accuracy of the TBC4.1 software network adjustment module is of millimeter-level, and is not limited by the type of precise ephemeris.