On ionosphere-delay processing methods for single-frequency precise-point positioning  

作　　者：Tu Rui Zhang Qin Huang Guanwen Zhao Hong 

机构地区：[1]College of Geology Engineering and Geomatics, Chang＇an University, Xi＇an 710054, China

出　　处：《Geodesy and Geodynamics》2011年第1期71-76,共6页大地测量与地球动力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(40902081,40774001,40841021)

摘　　要：In single-frequency precise-point positioning of a satellite,ionosphere delay is one of the most important factors impacting the accuracy. Because of the instability of the ionosphere and uncertainty of its physical properties, the positioning accuracy is seriously limited when using a precision-limited model for correction. In order to reduce the error, we propose to introduce some ionosphere parameter for real-time ionosphere-delay estimation by applying various mapping functions. Through calculation with data from the IGS（ International GPS Service） tracking station and comparison among results of using several different models and mapping functions, the feasibility and effectiveness of the new method are verified.In single-frequency precise-point positioning of a satellite,ionosphere delay is one of the most important factors impacting the accuracy. Because of the instability of the ionosphere and uncertainty of its physical properties, the positioning accuracy is seriously limited when using a precision-limited model for correction. In order to reduce the error, we propose to introduce some ionosphere parameter for real-time ionosphere-delay estimation by applying various mapping functions. Through calculation with data from the IGS（ International GPS Service） tracking station and comparison among results of using several different models and mapping functions, the feasibility and effectiveness of the new method are verified.

关 键 词：single-frequency precise-point positioning ionosphere delay model correction mapping function parameter estimation 

分 类 号：P228.4[天文地球—大地测量学与测量工程] TP15[天文地球—测绘科学与技术]