摘要
利用北斗三频超宽巷模糊度波长较长易于固定的优势,提出一种基于北斗三频的BDS/GPS宽巷模糊度逐级单历元固定方法。首先利用载波和伪距组合固定BDS(0,-1,1)和(1,4,-5)两个超宽巷模糊度,根据固定后的超宽巷模糊度变换得到BDS宽巷模糊度(1,-1,0),然后将BDS宽巷模糊度作为约束条件与GPS宽巷观测方程联立得到GPS宽巷模糊度浮点解和其方差协方差阵,最后采用LAMBDA算法实现GPS宽巷模糊度的固定。实验结果表明,BDS超宽巷组合可实现100%固定,采用BDS约束GPS宽巷模糊度固定时ratio值均大于2,大于5的占97.8%以上,因此文中提出的方法可实现BDS/GPS双系统宽巷模糊度单历元固定,有效提升GNSS模糊度解算的时效性。
Using the advantage of BDS EWL's longer wavelength in ambiguity fixing,a single epoch BDS/GPS WL ambiguity resolution method based on BDS triple frequency is proposed in this paper.First,the ambiguity of BDS EWL (0,-1,1) and (1,4,-5) are resolved by the combination of carrier and pseudorange.Second,the ambiguity of BDS WL (1,-1,0),tranformed from the fixed EWL ambiguity,is set as the constraint,to calculate float ambiguity and its variance covariance matrix of GPS Wide Lane with the observation equation of WL.Finally,LAMBDA method is utilized to resolve the GPS WL ambiguity.Experimental result shows that BDS EWL ambiguity success rate can reach to 100%.Using the BDS to constriant GPS WL ambiguity fixing,all ratios are above 2 and more than 97.8% are above 5.In conclusioin,the method proposed in this paper can realize Single-Epoch BDS/GPS WL ambiguity resolution,effectively improving the timeliness of GNSS ambiguity resolution.
作者
尚睿
高成发
潘树国
陆轶材
张瑞成
SHANG Rui;GAO Chengfa;PAN Shuguo;LU Yicai;ZHANG Ruicheng(School of Transportation,Southeast University,Nanjing 210096,China;School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China)
出处
《测绘工程》
CSCD
2018年第4期1-5,13,共6页
Engineering of Surveying and Mapping
基金
江苏省自然科学基金资助项目(BK20171353)
关键词
北斗三频
BDS/GPS
超宽巷
宽巷
triple frequency of BDS
BDS/GPS
extra wide lane
wide lane
