一种无盲点GNSS三频组合周跳探测与修复方法  

A GNSS triple-frequency combination cycle slip detection and repair method with no blind spot

作　　者：夏思琦 于先文[1] XIA Siqi;YU Xianwen(School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学交通学院,南京211189

出　　处：《测绘科学》2020年第7期62-69,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41674035,41974030)。

摘　　要：针对GNSS现有的三频组合周跳探测法对特殊周跳组合容易出现探测盲点的问题,该文提出一种无盲点三频组合周跳探测与修复方法。该方法构造一个三频无几何相位组合和一个三频STPIR组合;利用这两个组合构建出公共盲点模型,进而得到三频伪距相位组合的系数约束条件;以此条件为基础,构造出可以探测出前两种组合盲点的三频伪距相位组合。将三频无几何相位组合、三频STPIR组合和特别构造的三频伪距相位组合联立,形成无盲点三频组合法,实现对各频点观测值周跳的无盲点探测与修复。利用实测数据对本文提出的无盲点三频组合法的有效性进行了验证,结果表明:该方法探测并修复了实测数据中所有的周跳,并对人为设置的特殊周跳组合实现了无盲点探测与修复。Aiming at the problem that the existing triple-frequency combination cycle slip detection method often had a detection blind spot for the special cycle slip combination,this paper proposed a combination method without blind spots to detect and repair cycle slips on triple frequency data.This method first constructed a triple frequency geometry-free phase combination and a triple frequency STPIR combination;using these two combinations to construct a common blind spot model,and then obtained the coefficient constraint condition of the triple frequency pseudo-range phase combination;based on this condition,constructed the triple frequency pseudo-range phase combination that could detect the first two combined blind spots.The triple frequency geometry-free phase combination,the triple frequency STPIR combination,and the specially constructed triple frequency pseudo-range phase combination were combined to form a blind-free triple frequency combination method,which realized the detection and repair of cycle slips of observed values at each frequency point.Through using measured data for verification analysis,the results showed that the method could detect and repair all the cycle slips in the measured data,and realized the blind spot detection and repair for the artificially set special cycle slip combination.

关 键 词：三频 盲点 周跳 无几何相位组合 伪距相位组合 

分 类 号：P228[天文地球—大地测量学与测量工程]