Performance Evaluation of QZSS Augmenting GPS and BDS Single-Frequency Single-Epoch Positioning with Actual Data in Asia-Pacific Region

Performance Evaluation of QZSS Augmenting GPS and BDS Single-Frequency Single-Epoch Positioning with Actual Data in Asia-Pacific Region
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QZSS增强GPS和BDS单频单历元定位亚太地区实际数据性能评估

DOI:
10.3390/ijgi7050186
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发表时间:
2018-05
影响因子:
3.4
通讯作者:
Lihui Yao
Lihui Yao
中科院分区:
地球科学3区
文献类型:
--
作者:
Qiuzhao Zhang;Wei Yang;Shubi Zhang;Lihui Yao

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准天顶卫星系统(QZSS)的服务范围覆盖亚太地区,目前有四颗准天顶卫星(QZS)在轨运行,其中三颗QZS运行至2018年3月。QZSS不需要在独立模式下工作,但该系统可用于增强全球定位系统(GPS)或北斗卫星导航系统(BDS)。通过仿真比较了GPS/QZSS和BDS/QZSS在不同截止仰角下的可用性、位置精度因子(PDOP)、模糊度精度因子(ADOP)和定位成功率。本文对两组QZSS实测数据进行了处理和分析,并结合GPS/BDS数据进行了单频单历元定位。采用不同的组合形式对GPS/QZSS和BDS/QZSS的定位性能进行了评估。结果表明,QZSS能够提高SFSE PDOP,ADOP和基线分辨率的成功率,降低GPS或BDS的位置误差,特别是对于较长的GPS基线数据。使用的QZS越多,增强效果越好。
The Quasi-Zenith Satellite System (QZSS) service area covers the Asia-Pacific region and there are four quasi-zenith satellites (QZS) in orbit with three QZS in operation until March 2018. The QZSS is not required to work in a stand-alone mode, but the system can be used to enhance the Global Positioning System (GPS) or Beidou Satellite Navigation System (BDS). The availability, position dilution of precision (PDOP), ambiguity dilution of precision (ADOP), and success rate of GPS/QZSS and BDS/QZSS under different cut-off elevation angles were compared based on a simulation. Two sets of actual QZSS data were processed and analyzed for single-frequency single-epoch (SFSE) positioning together with GPS/BDS data in this paper. Different combination forms were executed to evaluate the positioning performance of GPS/QZSS and BDS/QZSS for two baseline cases. The results indicate that QZSS is able to increase the SFSE PDOP, ADOP, and success rate of the baseline resolution and decrease the position error for GPS or BDS, especially for longer GPS baseline data. The more QZS are used, the better the enhancement effect.
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