摘要
利用北斗三频模糊度易于固定的特点,提出了一种基于北斗三频约束的BDS/GPS短基线模糊度单历元解算方法.首先利用载波伪距组合快速求解北斗三频(0,-1,1)双差超宽巷模糊度,然后利用已固定模糊度的(0,-1,1)组合观测值与(1,4,-5)组合观测值组成无几何模型,以求解(1,4,-5)组合双差模糊度;在两个超宽巷模糊度求解完成之后,利用宽巷模糊度约束与两个无几何模型方程联立快速求解北斗基频双差模糊度;最后利用已固定模糊度的北斗基础观测值与GPS基础观测值方程联立以求解GPS基频双差模糊度.煤矿开采沉陷自动化监测系统的短基线实验结果表明,采用提出的方法可实现单历元求解北斗超宽巷、基频模糊度和GPS基频模糊度.
Taking the advantage of easy to fix for BeiDou three frequency ambiguity,a kind of single epoch algorithm for BDS/GPS short baseline ambiguity was proposed by BeiDou three frequency constraint.First,the double difference ultra wide lane ambiguity of three frequency(0,-1,1)were solved rapidly with BeiDou carrier pseudorange combination,and then the geofree model,composed by the combination observations with the fixed ambiguity of(0,-1,1)and the combination observations of(1,4,-5),was used to solve the double difference ambiguity of(1,4,-5)combination.After the two ultra wide lane ambiguity were obtained,BeiDou fundamental frequency double difference ambiguity can be solved quickly with the wide lane ambiguity constraint and the two geo-free model equations.Finally,using the BeiDou basic observation with fixed ambiguities and GPS basic observation equations,GPS fundamental frequency double difference ambiguity can be solved.The test results of short baseline experiment,from mining subsidence automatic monitoring system,shows that,using the proposed approach,BeiDou ultra wide lane and fundamental frequency ambiguity,as well as GPS funda-mental ambiguity can be achieved accurately in single epoch.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2015年第6期1090-1096,共7页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(41074010
41474026)
江苏省普通高校研究生科研创新计划项目(CXZZ12-0939)
江苏省高校优势学科建设工程项目(SZBF2011-6-B35)
关键词
北斗三频
GPS
短基线
模糊度解算
单历元
沉陷监测
BDS three frequency
GPS
short baseline
solving ambiguity
single epoch
subsidence monitoring