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GNSS World of China

GNSS World of China

Volume 48 Issue 3
Jun.  2023
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WANG Chao, LIU Changjian, XIAO Guorui, SUN Shuang, MENG Xin. Assessment of antenna array-aided RTK positioning with different cut-off elevation angles[J]. GNSS World of China, 2023, 48(3): 93-101. DOI: 10.12265/j.gnss.2023028
Citation: WANG Chao, LIU Changjian, XIAO Guorui, SUN Shuang, MENG Xin. Assessment of antenna array-aided RTK positioning with different cut-off elevation angles[J]. GNSS World of China, 2023, 48(3): 93-101. DOI: 10.12265/j.gnss.2023028
shu

Assessment of antenna array-aided RTK positioning with different cut-off elevation angles

  • School of Surveying and Mapping, Information Engineering University, Zhengzhou 450001, China

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  • Received Date: February 20, 2023
    Graphical Abstract
    • Abstract
  • To evaluate the positioning performance of antenna array-aided real time kinematic (RTK), the mathematical model of antenna array-aided RTK is compared with the mathematical model of RTK firstly, and then a set of static measurement is processed with antenna array-aided RTK and RTK at different cut-off elevation angles. It is demonstrated that the strength of RTK is enhanced by increasing the redundancy of the double-difference observation equation from antenna array, which can improve the success rate of ambiguity resolution and positioning accuracy. Based on the combination of GPS and BDS, the antenna array-aided RTK achieves 93.6% ambiguity resolution success rate at a large cut-off elevation angle of 50°. Moreover, the horizontal accuracy of the fixed solution is better than 1 cm and the height accuracy is better than 2 cm, which can fulfill the demand of high-precision positioning and improve the applicability of RTK in urban canyon environment.
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    • References (19)
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