基于L5的GPS电离层折射误差改正  

The correction of GPS ionosphere refraction error base on the L5

作　　者：刘庆元[1] 包海[1] 王潜心[1] 王虎[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《测绘工程》2008年第1期17-20,共4页Engineering of Surveying and Mapping

摘　　要：在分析电离层折射误差模型以及双频改正模型的基础上,在原有的双频数据处理方法之下,利用GPS现代化中新增的L5频率与原有的L1、L2频率进行新的双频组合,再利用双频组合解算来得出电离层折射误差,以取得双频最优改正值,进而即可对GPS的电离层折射误差进行有效的改正。同时,简单介绍利用三频观测值改正电离层折射误差二阶项的方法。这些方法的使用均可提高GPS电离层折射误差的改正精度,从而提高GPS的定位精度,扩大其应用的深度与广度。Based on the strength of analyze ionosphere refraction error model and dual-frequency correction model in detail, with the method of dual-frequency data processing, this paper uses L5, which is added in the modern plan of GPS, assembled with L1 and L2, which has existed already, and then gets the new values. On this basis, it uses the combination value to calculate the ionosphere refraction error, to get the best correction value. Then the ionosphere refraction error can be corrected effectively. At the same time, it still introduces the methods that use triple-frequency observation value to correct ionosphere refraction error. And after uses those methods, the correct precision of ionosphere refraction error and the orientation precision of GPS can be improved, the apply range of GPS can be extended.

关 键 词：三频观测值 L5频率 电离层折射误差 双频改正 

分 类 号：P228.4[天文地球—大地测量学与测量工程]