QZSS系统在中国区域增强服务性能评估与分析

发布时间：2018-04-20 23:33

本文选题：QZSS + L-SAIF增强　；参考：《武汉大学学报(信息科学版)》2016年03期

【摘要】：日本准天顶卫星系统(QZSS)是区域性辅助与区域增强一体的导航系统,覆盖区域为日本及周边区域,包括我国部分区域,该系统采用IGSO卫星播发L1-SAIF与LEX两类增强信息,可以提供我国部分区域用户的高精度定位。本文从可用性、空间信号精度、用户动态精密单点定位几个方面对QZSS两类增强信号在中国区域的性能进行较为全面的评估,并采用QZS-1卫星实测数据进行实验,结果表明,以20°为截止高度角,中国大部分区域,尤其是东部沿海地区一天之内80%的时段可连续观测QZSS卫星;L1-SAIF差分增强信息可实现与目前WAAS相当的精度,URE约0.56m,满足1m左右的精密单点定位,平面精度优于1m;与L1-SAIF相比,LEX精度更高,轨道与钟差精度可达dm级,URE约0.4m,可实现亚m级定位,平面0.2m,高程0.5m。
[Abstract]:The Japanese quasi-zenith satellite system (QZSS) is a navigation system integrated with regional assistance and regional enhancement, covering Japan and its surrounding areas, including parts of China. The system uses IGSO satellites to broadcast two types of enhanced information, L1-SAIF and LEX. It can provide high precision positioning for some area users in our country. In this paper, the performance of two kinds of enhanced QZSS signals in China is comprehensively evaluated from the aspects of availability, precision of space signal and dynamic precise single point positioning of users. The experimental results show that the performance of the two kinds of enhanced signals in China is measured by QZS-1 satellite data. At the cut-off altitude angle of 20 掳, 80% of the QZSS satellite L1-SAIF differential enhancement information can be continuously observed in one day in most areas of China, especially in the eastern coastal areas. The accuracy of the enhancement information of L1-SAIF is about 0.56 m, which can meet the precision of about 1m in single point positioning. Compared with L1-SAIF, the precision of plane is better than that of L1-SAIF, and the accuracy of orbit and clock difference is about 0.4 m, which can realize sub-m positioning, plane 0.2 m, elevation 0.5 m.
【作者单位】：武汉大学卫星导航定位技术研究中心;
【基金】：国家自然科学基金(41374034)~~
【分类号】：P228

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