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A new GPS/BDS tropospheric delay resolution approach for monitoring deformation in super high-rise buildings

机译：一种新的GPS / BDS对流层延迟解决方法，用于监测超高层建筑物变形

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摘要

A new approach for deformation monitoring of super high-rise building using GPS/BDS technology is proposed for the case when prior coordinates are known and the baseline is short but has a large height difference. The approach is based on the ambiguity function method (AFM). Considering that the double-differenced (DD) troposphere delay residual error cannot be ignored, the relative zenith tropospheric delay (RZTD) parameter is introduced into the original AFM equation. Thus, the RZTD and 3D coordinate parameters are together obtained through the modified AFM (MAFM). Due to the low computational efficiency of conventional AFM, an improved particle swarm optimization (IPSO) algorithm is used to search the four optimal parameters X/Y/Z/RZTD and replaces the grid search method. In this study, GPS/BDS deformation monitoring data for buildings with approximately 290 m height difference were used to verify the feasibility of the proposed MAFM. Numerical results show a single-epoch average computation time of approximately 0.3 s, which meets the requirements of near-real-time dynamic monitoring. The average accuracy of the GPS single-epoch RZTD solution is better than 1 cm, the combined GPS/BDS MAFM performance outperforms the GPS-only system, and using multi-epoch observations can further improve the accuracy of the RZTD solution. After RZTD correction, GPS/BDS monitoring precision can be improved, particularly the height dimension, whose precision is improved by approximately 6 cm.
机译：提出了一种新的使用GPS / BDS技术来监测超高层建筑物的变形监测，以便在已知先前的坐标并且基线短时但具有大的高度差异时。该方法基于歧义功能方法（AFM）。考虑到双差异（DD）对流层延迟剩余误差不能忽视，相对Zenith对流层延迟（RZTD）参数被引入原始AFM方程。因此，RZTD和3D坐标参数通过修改的AFM（MAFM）获得在一起。由于传统AFM的计算效率低，改进的粒子群优化（IPSO）算法用于搜索四个最优参数X / Y / Z / RZTD并替换网格搜索方法。在本研究中，用于大约290米高度差异的建筑物的GPS / BDS变形监测数据用于验证所提出的MAFM的可行性。数值结果显示了一个大约0.3秒的单次时代平均计算时间，符合近实时动态监控的要求。 GPS单时期RZTD溶液的平均精度优于1厘米，组合的GPS / BDS MAFM性能优于GPS系统，并且使用多钟观测可以进一步提高RZTD解决方案的准确性。在RZTD校正之后，可以改善GPS / BDS监测精度，特别是高度尺寸，其精度提高约6厘米。

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