全球定位系统2025，Vol.50Issue(1)：60-68,9.DOI:10.12265/j.gnss.2024136
北斗三频非组合精密单点定位频间钟偏差改正比较分析
Comparison and analysis of inter-frequency clock bias correction for BeiDou triple-frequency uncombined precise point positioning
摘要
Abstract
Addressing the issue that the traditional precise clock offset products cannot be directly used for the third frequency of BDS triple-frequency uncombined precise point positioning(PPP)phase observations,this paper calculated the inter frequency clock bias(IFCB)using BDS-2 stations in the Asia Pacific region and BDS-3 stations in the global region and analyzed their time characteristics.Meanwhile,the positioning results of BDS triple-frequency uncombined PPP corrected using the calculated IFCBs and CNES Bias products were compared.The results indicate that the magnitude of IFCB of BDS-2 is within 3 cm,and the magnitude of IFCB of BDS-3 is within 2 cm.Compared with no IFCB correction,the 3D positioning accuracy of BDS-2 triple-frequency uncombined PPP improved by 14.07%when using IFCB correction,and the posterior phase residual was reduced by 8.82%.However,the BDS-2 triple-frequency uncombined PPP corrected by CNES's Bias product is getting worse in both positioning accuracy(4.94%reduction)and posterior phase residual(2.94%increase).The improvement effect of BDS-3 triple-frequency uncombined PPP positioning accuracy corrected by CNES's Bias product(23.02%)is better than that corrected by IFCB product(5.28%),and the posterior phase residual of the two correction methods is basically equivalent to that without correction.关键词
北斗卫星导航系统(BDS)/精密单点定位(PPP)/三频/非组合/频间钟差偏差(IFCB)Key words
BDS/precise point positioning(PPP)/triple-frequency/uncombined/inter-frequency clock bias(IFCB)分类
天文与地球科学引用本文复制引用
李伟,白天阳,陈向东,冷宏宇,李开元..北斗三频非组合精密单点定位频间钟偏差改正比较分析[J].全球定位系统,2025,50(1):60-68,9.基金项目
关键技术及应用研究专项(52680024000K) （52680024000K）
