摘要
Abstract
This paper aimed to evaluate the precise point positioning(PPP)performance of the global positioning system(GPS,with system code of G),global navigation satellite system(GLONASS,with system code of R),Galileo satellite navigation system(Galileo,with system code of E),BeiDou navigation satellite system(BDS,with system code of C),and their combinations in marine environments.By utilizing five-day global navigation satellite system(GNSS)buoy observation data from 2022,the PPP method was employed to process the data from GPS,GLONASS,Galileo,BDS,and various system combinations.A comparative analysis of the positioning accuracy and convergence time of each system and their combinations was conducted.The results indicate that during the experimental period,the average number of available satellites for each system combination in ascending order is as follows:G<R<E<GR<GE<C<GC<GCRE.The positioning accuracy in ascending order is G<R<E<GR<GE<C<GC<GCRE,showing a high correlation with the number of available satellites.The convergence speed of different system combinations in ascending order is R<E<G<GR<GE<C<GC<GCRE.Multi-system combinations significantly improve convergence speed.By combining the number of available satellites in different system combinations,it is found that the convergence speed has a strong relationship with the number of available satellites.By increasing the number of available satellites and optimizing their geometric distribution,multi-system combinations significantly enhance positioning accuracy and convergence speed,providing reliable technical support for marine surveying and dynamic positioning applications.关键词
全球导航卫星系统/定位精度/收敛速度/卫星数量Key words
global navigation satellite system(GNSS)/positioning accuracy/convergence speed/number of satellite分类
天文与地球科学
