北斗系统在南极中山站地区的基本定位性能评估

发布时间：2018-04-17 22:26

本文选题：北斗卫星导航系统 + 性能评估　；参考：《武汉大学学报(信息科学版)》2017年08期

【摘要】：对北斗区域卫星导航系统(BDS)正式运行后在南极中山站地区的基本导航定位性能进行了评估,包括卫星可用性、位置精度因子(PDOP)、伪距观测值质量、电离层模型精度及单频伪距导航定位性能等方面。对南极中山站地区实测数据分析的结果表明,首先,北斗卫星导航系统的可用性与伪距观测值质量在总体上与GPS处于同一水平,并已初步具备了全天导航定位的能力,但存在卫星分布不够均匀、GEO卫星高度角较低、电离层模型精度较差等问题。其次,北斗单频伪距单点定位北、东方向的精度分别优于22m和9m,高程方向优于25m;超短基线的单频伪距差分定位在北、东、高程三个方向的精度分别为3.6m、2.3m和3.3m;总体而言与GPS相比有一定差距。最后,北斗/GPS组合定位相对于单一的GPS定位不仅增加了系统的可靠性,还对定位的精度有明显改善,对于单频伪距单点定位、伪距差分定位的三维点位精度可分别提高10%、22%。
[Abstract]:The basic navigation and positioning performance of Beidou Regional Satellite Navigation system (BDS) in Zhongshan Station, Antarctica, is evaluated, including satellite availability, position accuracy factor (PDOPN), pseudo-range observation quality, etc.The accuracy of ionospheric model and the positioning performance of single frequency pseudo-range navigation are discussed.The analysis of the measured data in Zhongshan Station, Antarctica shows that, first of all, the availability and pseudo-range quality of the Beidou satellite navigation system are at the same level as that of GPS, and the capability of all-day navigation and positioning has been preliminarily possessed.However, the satellite distribution is not uniform enough and the altitude angle of GEO satellite is low, and the accuracy of ionospheric model is poor.Secondly, the accuracy of Beidou single frequency pseudo-range single point positioning is better than 22m and 9m in the east direction and 25m in the elevation direction respectively, and the single-frequency pseudo-range differential positioning of the ultra-short baseline is located in the north and east,The accuracy of the three directions of elevation is 3.6mg 2.3m and 3.3mrespectively, which is slightly different from that of GPS.Finally, compared with the single GPS positioning, the Beidou / GPS integrated positioning not only increases the reliability of the system, but also improves the positioning accuracy obviously. For single frequency pseudo-range single point positioning, the three dimensional accuracy of pseudo-range differential positioning can be increased by 10% and 22% respectively.
【作者单位】：武汉大学中国南极测绘研究中心;山东大学空间科学研究院;武汉市勘察设计有限公司;
【基金】：国家自然科学基金(41231064,41174029,41531069) 测绘地理信息公益性行业科研专项基金资助项目(201412009)~~
【分类号】：P228.4

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