摘要
为减少多星座精密单点定位(PPP)数据处理过程中待估参数数量并提高定位精度,提出基于模糊度整数解的无电离层组合PPP性能评估方法。使用在线单点定位服务进行仿真建模,通过组合双频观测值消除电离层待估参数延迟并简化数据处理模型,利用模糊度固定技术实现PPP解算以降低定位误差。仿真结果表明,与单GPS系统PPP性能评估方法相比,静态模式下的GPS/GLONASS多星座PPP性能评估方法具有更高的定位精度和更快的收敛速度。
In order to reduce the number of parameters to be estimated and improve the positioning accuracy in the data processing of multi-constellation Precise Point Positioning(PPP),a performance evaluation method based on ambiguity integer solution for the ionosphere-free PPP is proposed.The simulation model is built by using online point positioning service.The delay of estimated ionospheric parameters is eliminated and the data processing model is simplified by dual-frequency observations,and the error of PPP resolving is reduced by using the fixed ambiguity technique.Simulation results show that compared with single GPS system PPP performance evalution method,GPS/GLONASS multi-constellation PPP performance evalution method has higher positioning accuracy and faster convergence speed in static mode.
作者
何为
郭承军
田忠
HE Wei;GUO Chengjun;TIAN Zhong(Research Institute of Electronic Science and Technology,University of Electronic Science and Technology of China,Chengdu 611731,China)
出处
《计算机工程》
CAS
CSCD
北大核心
2019年第5期88-92,共5页
Computer Engineering
基金
国家部委基金
关键词
多星座
精密单点定位
定位精度
性能评估
模糊度
multi-constellation
Precise Point Positioning(PPP)
positioning accuracy
performance evaluation
ambiguity
作者简介
何为(1992-),男,硕士研究生,主研方向为卫星导航定位、惯性导航;E-mail: hewei9211@163.com;郭承军,博士研究生;田忠,研究员。
