| 亚太区域不同遮挡情形下多系统组合PPP定位效能分析 |
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| 引用本文： | 黄观文,雷哲哲,王进,赵丽华.亚太区域不同遮挡情形下多系统组合PPP定位效能分析[J].大地测量与地球动力学,2018,38(6):562-567. |
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| 作者姓名： | 黄观文 雷哲哲 王进 赵丽华 |
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| 作者单位： | 长安大学地质工程与测绘学院 |
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| 摘 要： | 利用多测站实测GNSS观测数据，模拟四周遮挡（城市环境）、单侧遮挡（峡谷环境）和顶空遮挡（大型桥梁路基环境）3种遮挡环境，从可用卫星数、PDOP值、可用历元率、定位精度和收敛时间5个方面，综合分析多系统PPP技术的定位服务效能。结果显示，相比GPS单系统PPP定位结果，在无遮挡环境下，四系统融合PPP技术在可用卫星数、PDOP值、可用历元率、定位精度和收敛时间方面分别改进300%、40%、2%、20%和50%；在遮挡环境下，分别改进300%、60%、25%、39%和52%。
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| 关 键 词： | 精密单点定位 多系统 遮挡条件 组合定位 |
Efficiency Analysis of Multi-GNSS Combined PPP in Complex Conditions of Asia-Pacific Region |
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| HUANG Guanwen,LEI Zhezhe,WANG Jin,ZHAO Lihua.Efficiency Analysis of Multi-GNSS Combined PPP in Complex Conditions of Asia-Pacific Region[J].Journal of Geodesy and Geodynamics,2018,38(6):562-567. |
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| Authors: | HUANG Guanwen LEI Zhezhe WANG Jin ZHAO Lihua |
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| Abstract: | In order to analyze the efficiency of multi-GNSS combined PPP technology in different complex conditions in the Asia-Pacific region, GNSS observations from five stations are used to simulate three kinds of shelter conditions: surrounded shelter(urban environment), unilateral shelter(canyon environment) and headspace shelter(large bridge subgrade environment). The service advantages and positioning efficiency of multi-system PPP technology are analyzed from the five aspects of available satellite number, PDOP value, available rates, positioning accuracy and convergence time. The numerical results show that, compared to single GPS PPP results, the four-system GNSS PPP results can be improved 300%, 40%, 2%, 20% and 50% in terms of available satellite number, PDOP value, available rate, positioning accuracy and convergence time in the normal environment, and 300%, 57%, 25%, 39% and 52% in the complex environment. |
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| Keywords: | PPP multi-system shelter conditions combined positioning |
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