Galileo四频数据周跳探测与修复方法  

Cycle-slip detection and repair method for Galileo quad-frequency data

作　　者：吕震 王振杰[1] 单瑞 刘金萍 LYU Zhen;WANG Zhenjie;SHAN Rui;LIU Jinping(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao,Shandong 266580,China;College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China;Qingdao Institute of Marine Geology,CGS,Qingdao,Shandong 266237,China;Shengli Branch of Sinopec Geophysical Corporation,Dongying,Shandong 257000,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]同济大学测绘与地理信息学院,上海200092 [3]中国地质调查局青岛海洋地质研究所,山东青岛266237 [4]中石化地球物理公司胜利分公司,山东东营257000

出　　处：《导航定位学报》2022年第3期69-77,共9页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41406115);中石化科技攻关项目(JP21004)。

摘　　要：针对伽利略卫星导航系统(Galileo)可以提供四频信号的特点,提出一种四频周跳探测与修复方法。首先,按照波长较长、电离层延迟和观测噪声较小的标准,选出具有良好探测性能的周跳探测组合,之后联合三个无几何相位组合和一个无几何无电离层组合进行周跳探测。然后,引入最小二乘模糊度降相关(LAMBDA)算法进行周跳修复,并根据比率(ratio)值进一步验证周跳修复结果的正确性。最后,利用Galileo四频观测数据对本算法的有效性和可靠性进行验证。实验结果表明,本方法可以有效准确地对四频数据进行周跳探测与修复。Aiming at the characteristic that Galileo navigation satellite system(Galileo)can provide quad-frequency signals,we develop a cycle-slip detection and repair method for quad-frequency observations.Firstly,some proper cycle-slip detection combinations which have great cycle-slip detection performance are selected according to the criteria of longer wavelength,smaller ionospheric delay and observation noise.Three geometry-free phase combinations as well as one geometry-free ionosphere-free combination are combined to detect cycle-slip.Then the Least-square AMbiguity Decorrelation Adjustment(LAMBDA)method is introduced to repair cycle-slip,and the ratio threshold in the LAMBDA method is adopted to further verified the result of cycle-clip repair.At last,Galileo quad-frequency data have been used to validate the effectiveness and reliability of the whole algorithm.The experiment result indicates that the proposed method can effectively and accurately detect and repair cycle-slip of quad-frequency data.

关 键 词：伽利略卫星导航系统 四频数据 周跳探测与修复 无几何相位组合 无几何无电离层组合 

分 类 号：P228[天文地球—大地测量学与测量工程]