GPS高程测量数据处理分析及拟合方法研究

Research on GPS height measurement data processing analysis and fitting method

为了深入认识GPS高程测量数据处理及拟合方法,分析了GPS水准测量的误差,误差主要由接收站、卫星信号传播站和GPS卫星造成的,综合分析了提高测量精度的措施;研究了模型参数的抗差估计、GPS高程拟合模型的选择以及GPS高程转换模型参数优选流程,以实例为基础,研究了不同模型对水准联测数据检验和拟合结果、不同模型的精度和AIC值。研究得出,混合模型和综合模型的拟合精度和模型精度要明显优于单一模型。

In order to deeply understand the GPS elevation measurement data processing analysis and fitting method,the error of GPS leveling measurement is analyzed.The error is mainly caused by the receiving station,satellite signal transmission station and GPS satellite.The measures to improve the measurement accuracy are comprehensively analyzed.The model was studied.The parameter robust estimation,GPS elevation fitting model selection and GPS elevation conversion model parameter optimization process,and then based on the example,studied the test and fitting results of different models for horizontal joint test data,the accuracy and AIC values of different models.The study showed that the fitting accuracy and model accuracy of the hybrid model and the integrated model are significantly better than the single model.