载波相位观测对传统双频GPS电离层模型改进研究

摘要

详细推导出利用GPS双频码距和载波相位观测联合双频码距进行电离层电子密度求定的2种模型,给出了求定这2种模型参数的数学表达,从理论上指出该2种模型分别适合单历元和多历元解算的基本条件,通过实例进行了2种模型的电离层修正误差的分析和比较.结果表明,载波相位观测联合双频码距建立电离层延迟模型具有观测数据利用率较高、解算精度高等优点.%Two models of electron density in ionosphere were deducted, which were double-frequency code observation and double-frequency phase carrier phase observation using GPS. Mathematical expressions for solving the parameters in the two models were given. The basic conditions suitable for single epoch and many epochs were derived, through the example of the two models of the ionosphere correction error analysis and comparison. Results showed that the established model has the advantages of higher observation data utilization rate and higher precision.