北斗星基增强系统双频多星座服务性能研究  

Research on service performance of dual-frequency multi-constellation BDSBAS

作　　者：刘宁宁 赵立谦 金彪[1] 邹国际 潘丽静 王绍贤 LIU Ningning;ZHAO Liqian;JIN Biao;ZOU Guoji;PAN Lijing;WANG Shaoxian(Space Star Technology Co.Ltd.,Beijing 100095,China;Tianjin Zhong Wei Aerospace Data System Technology Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]航天恒星科技有限公司,北京100095 [2]天津航天中为数据系统科技有限公司,天津300450

出　　处：《测绘科学》2024年第9期1-10,共10页Science of Surveying and Mapping

基　　金：国家自然科学基金青年基金项目(42304045);中国科协青年人才托举工程项目(2022QNRC001)。

摘　　要：针对北斗星基增强系统(BDSBAS)双频多星座(DFMC)服务模式完好性及可用性问题,利用中国地区广域分布的地面监测站实测数据,对BDSBAS双频服务伪距域及定位域性能进行分析。结果表明:BDSBAS DFMC模式伪距域完好性优于99%,经双频改正后的BDS和GPS卫星伪距残差分别为0.44 m和0.68 m。DFMC BDS单系统增强模式水平和垂直定位误差均方根值(RMS)分别为0.71 m和1.15 m,相对于BDS单点定位三维精度提升13.9%;DFMC BDS+GPS双系统定位模式为0.65 m和1.15 m,相对于BDS+GPS双系统单点定位提升11.6%。测试时段内中部区域测站一类精密进近(CAT-I)可用性大于99%,满足民航应用要求;边缘地区测站可用性有所降低,BDS单系统定位模式为92%~99%,BDS+GPS双系统定位模式为96%~99%。相比于BDS单系统增强模式,双系统增强模式能够改善星座构型,降低定位保护级,提升定位连续性和系统可用性,同时也会导致危险误导信息(HMI)风险提高,定位域完好性降低。As to the integrity and availability of the dual-frequency multi-constellation(DFMC)BeiDou satellite-based augmentation system(BDSBAS),this contribution analyzed the performance of the DFMC BDSBAS in pseudorange domain and positioning domain using measurements of the monitoring stations in China's Mainland.Results showed that:In DFMC BDSBAS mode,the range domain integrity was better than 99%,and the residual errors of BDS and GPS satellites were 0.44 m and 0.68 m,respectively.The root mean square(RMS)values of horizontal and vertical positioning errors in DFMC BDS mode were 0.71 m and 1.15 m,with a three-dimensional accuracy improvement of 13.9%relatived to BDS single point positioning(SPP);The counterpart in BDS+GPS dual-system positioning mode were 0.65 m and 1.15 m,which improved 11.6%compared to the BDS+GPS dual-system SPP.During the testing period,the availability of Category I(CAT-I)approach in the central region was greater than 99%,which could meet the requirements for civil aviation applications;The availability in peripheral areas were decreased to 92%-99%in BDS single-system positioning mode and 96%-99%in BDS+GPS dual-system positioning mode.Compared to BDS single-system mode,dual-system mode could improve constellation configuration,reduce positioning protection levels,enhance positioning continuity and system availability,while also led to increased hazardously misleading information(HMI)risk and reduced positioning domain integrity.

关 键 词：北斗星基增强系统 双频多星座 完好性 可用性 伪距域 双频测距误差 

分 类 号：P228[天文地球—大地测量学与测量工程]