不同LEO星座机会定位的多普勒GDOP下界

2023 5th International Conference on Electronic Engineering and Informatics (EEI) Pub Date : 2023-06-30 DOI:10.1109/EEI59236.2023.10212488

Danyao Wang, H. Qin, E. Piao

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引用次数: 0

摘要

针对传统全球卫星导航系统(GNSS)抗干扰能力弱的问题，研究了一种基于LEO星座机会信号的导航系统，对其进行补充和增强。由于LEO卫星机会信号一般采用与GNSS不同的多普勒定位方法，本文深入研究了LEO卫星定位的多普勒几何稀释精度因子(DGDOP)下界表达式及变化规律，以评估在不同LEO星座定位的局限性和潜力。利用系统工具箱(STK)平台输出的实际LEO卫星轨道数据，分析了不同LEO星座的可见光卫星和DGDOP随纬度的变化规律，验证了DGDOP下界解析表达式的有效性。

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Doppler GDOP Lower Bound for Different LEO Constellations of Opportunity Positioning

To address the weak anti-interference capability of the conventional global satellite navigation system (GNSS), a navigation system based on the opportunity signal of LEO constellation is studied to complement and enhance it. Since LEO satellite opportunity signal generally adopts the Doppler positioning method different from GNSS, the Doppler geometric dilution of precision factor (DGDOP) lower bound expression and variation law for LEO satellite positioning are studied in depth in this paper, to assess the limitation and potential of positioning in different LEO constellations. The paper analyzes the variation law of visible satellites and DGDOP with latitude for different LEO constellations using the actual LEO satellite orbit data output from the system tool kit (STK) platform, and verifies the validity of the analytical expression for the lower bound of DGDOP.

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2023 5th International Conference on Electronic Engineering and Informatics (EEI)

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