车载及船载场景PPP-B2b动态定位性能分析
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Assessment of PPP-B2b kinematic positioning performance
undervehicle andvessel scenarios
XIE Xiaofeng'，ZHANG Yuanfan²* ，WANG Zhenjie²，DU Jun³ （1. National Earthquake Response Support Service，Beijing 100049，China; 2. Colege of Oceanography and Space Informatics，China University of Petroleum （East China），Qingdao 266580， China; 3.Qingdao Shihua Crude Oil Terminal，Qingdao 26650o，China）
Abstract：The assessment of PPP-B2b kinematic positioning performance under diferent scenarios willbe animportant referenceforusersandcontribute totheexpansionof theapplication scopeand promotionof BDS-3.Inthis study，the kinematic positioning performance ofthePPP-B2b service of BDS-3under diffrent scenarios was comprehensively analyzed byperformingonevehicle experiment andonevessel experiment.Experimental results indicate that using the
post-procesing product released by the Helmholtz Centre Potsdam-German Research Centre for Geosciences（GFZ）as a reference，the PP-B2b product had orbit correction accuracy upto the decimeter level and clock corrction accuracy up to the sub-meter level.In the vehicle experiment of PPP-B2b，multipath-rot mean square （MP-RMS）for BDS-3 B1/B2 frequencies was 41.3cm ，while that for GPS L1/L2 frequencies was 52.2cm . The positioning accuracies of BDS-3 in the horizontal and vertical directions were 10.3 and 10.5cm and those of the BDS- 3+6PS combination were 5.6 and 4.9cm ， respectively. In the vessel experiment of PPP-B2b，the MP-RMS for BDS-3 B1/B2 frequencies was 52.5cm ，while that for GPS L1/L2 frequencies was 70.4cm .The accuracy values of BDS-3 in the horizontal and vertical directions were 22.5 and 12.0cm and those of the BD 15-3+GPS combination were 9.7 and 5.1cm ，respectively.The overall impact of multipath effcts nthekinematicpositioningperformanceof PPP-B2bin the vessel environment was slightly greater than that in the vehicle environment.
Key words ： precise point positioning； BeiDou-3 navigation satelite system； PPP-B2b service
全球卫星导航系统（global navigation satelite system，GNSS）精密单点定位（precise point positioning，PPP）技术由于只需要单台接收机即可实现分米级至厘米级精度的高精度定位，已成为社会生活和生产中最为普及的高精度定位技术[1]。（剩余13492字）