基于椭球基准的高速铁路CPⅢ网三维平差技术

研究目的:针对既有CPⅢ网建网及数据处理技术的缺陷,结合CPⅢ网的特点,提出基于椭球基准的三维平差函数模型,以充分发挥精密全站仪测量成果的作用,提高测量成果数据处理的可靠性。研究结论:该模型以椭球坐标系为基准,平差中无须考虑投影变形,可以直接对全站仪同步采集的、独立的原始观测数据进行三维平差处理,适用于任何尺度的控制网。不仅如此,利用该函数模型更有利于GPS和地面观测值的联合处理,且平差时可以直接对原始观测值进行统计检验。

3D Adjustment of CPⅢ Network for High-speed Railway Based on Ellipsoid Datum

Research purposes: Aiming at the defects of the existing CPⅢ network and data processing technology,and combining with the characteristics of the CPⅢ network,this paper presents the three-dimensional adjustment function model based on the ellipsoid datum to give full play to the effect of measuring result by accurate total station for enhancing the reliability of the measurement data processing. Research conclusions:The model is based on the ellipsoidal coordinate system without consideration of the project deformation in adjustment,and it can directly and synchronously process the independent and original observational data by 3D adjustment processing and be available for the network of any size.Besides,with this function model,it is more conducive to conduct the combined adjustment with the GPS values and terrestrial observation values,and it can directly do the statistical test to the original observation values in the adjustment.