强电离层环境下的北斗三频周跳探测与修复  

Detection and Repair of BDS Triple-Frequency Cycle Slip in Strong Ionospheric Environment

作　　者：彭华东 乔书波[1] 李林阳[1] 杨显赐 李松伟[1] 宋开放 PENG Huadong;QIAO Shubo;LI Linyang;YANG Xianci;LI Songwei;SONG Kaifang(School of Geospatial Information,Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450001

出　　处：《测绘与空间地理信息》2024年第6期90-94,共5页Geomatics & Spatial Information Technology

摘　　要：针对强电离层环境下,周跳探测受电离层延迟和伪距多路径的影响容易造成误探的问题,提出了一种适应强电离层环境的周跳探测与修复方法,并选取了合适的伪距相位组合探测阈值。本文选用三频GFIF相位组合、MW组合以及电离层改正的无几何伪距相位组合进行周跳探测,在周跳修复阶段采用电离层改正的伪距相位组合和2个MW组合,解决了联立方程病态问题。通过采用磁暴发生当天的JFNG与XMIS测站观测数据,并在数据中加入2周内小周跳和随机周跳进行实验,结果表明,该方法在强电离层环境下能准确地实现周跳的探测和修复。In the strong ionospheric environment,cycle slip detection is affected by ionospheric delay and pseudorange multipath,which is easy to cause false detections.A cycle slip detection and repair method adapted to the strong ionospheric environment is proposed,and a suitable threshold of pseudo-range phase combination detection is selected.In this paper,triple-frequency GFIF phase combination,MW phase combination and ionospheric correction geometric free pseudo-range phase combination are used for cycle slip detection.In the repair stage,ionospheric correction pseudo-range phase combination and two MW combinations are used to repair the cycle slip,which solved the ill condition of simultaneous equations.The experimental results show that the proposed method can detect and repair cycle slips accurately in strong ionospheric environment by using JFNG and XMIS observation data on the day of the magnetic storm,and adding small cycle slips and random cycle slips within two weeks into the data.

关 键 词：强电离层 北斗三频 周跳探测与修复 电离层改正 

分 类 号：P228[天文地球—大地测量学与测量工程]