北斗多频中长基线单历元模糊度解算分析  

Analysis of medium-long baseline single epoch ambiguity resolution based on BDS multi-frequency observations

作　　者：黄功文 王斌 李阳 李春晓 王建文 HUANG Gongwen;WANG Bin;LI Yang;LI Chunxiao;WANG Jianwen(Geodetic Data Processing Centre of Ministry of Natural Resources,Xi’an 710054,China)

机构地区：[1]自然资源部大地测量数据处理中心,西安710054

出　　处：《测绘科学》2022年第12期33-38,73,共7页Science of Surveying and Mapping

基　　金：陕西省2022年重点研发计划项目(2022ZDLSF07-12);国铁集团科技研究开发计划项目(N2021G048)

摘　　要：针对当前我国北斗二号(BDS-2)和北斗三号(BDS-3)并行和多频服务的特点,该文基于几何相关的统一多频非组合观测模型,实现对其多频信号的统一融合处理,分析了分步固定策略对中长基线情形下的单历元模糊度解算性能,并利用实际卫星导航观测数据进行验证。结果表明:对于60~138 km的中长基线,多频超宽巷和宽巷模糊度单历元可实现可靠固定;与传统双频情形相比,多频信息融合可显著改善单历元宽巷和窄巷模糊度固定性能,特别是多频数据可显著提高宽巷模糊度解算的Ratio值和Bootstrapping成功率,这对于利用北斗多频信号提供高精度独立定位服务具有重要参考意义。According to the circumstance that BDS-2 and BDS-3 provided services with multi-frequency observation data,this paper introduced a fusion method of processing the BDS multi-frequency observation data with the geometry-based unified multi frequency uncombined observation model.Also,the computational performance of the single-epoch ambiguity resolution for the medium-long baselines was evaluated using the stepwise AR strategy and the BDS multi-frequency observation data.The results showed that the multi-frequency extra-wide lane and wide-lane ambiguity could be fixed reliably in the single-epoch mode for the medium-long baselines ranging from 60 km to 138 km.Compared with the traditional dual-frequency,the fusion of the multi-frequency observations could significantly improve the single-epoch AR performance of wide-lane and narrow-lane ambiguity resolution,and especially could improve the rate of getting the Ratio and Bootstrapping values successfully when using the wide-lane ambiguity.This fact implied an innovative way of leveraging the multi-frequency signal of BDS to provide the high-precision independent positioning service.

关 键 词：北斗多频 中长基线 单历元 模糊度固定 

分 类 号：P228[天文地球—大地测量学与测量工程]