GNSS World of China

Volume 46 Issue 2
Apr.  2021
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WANG Shengliang, LIU Genyou, GAO Ming, CAO Shilong, XIAO Gongwei, ZHAO Wenhao. Performance analysis of high precision kinematic positioning of GPS-RTK/UWB tight combination[J]. GNSS World of China, 2021, 46(2): 69-76. doi: 10.12265/j.gnss.2020110603
Citation: WANG Shengliang, LIU Genyou, GAO Ming, CAO Shilong, XIAO Gongwei, ZHAO Wenhao. Performance analysis of high precision kinematic positioning of GPS-RTK/UWB tight combination[J]. GNSS World of China, 2021, 46(2): 69-76. doi: 10.12265/j.gnss.2020110603
shu

Performance analysis of high precision kinematic positioning of GPS-RTK/UWB tight combination

doi: 10.12265/j.gnss.2020110603
  • 1.

    State Key Laboratory of Geodesy and Earth’s Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China

  • 2.

    College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 2020-11-06
    Available Online: 2021-04-26
  • Publish Date: 2021-05-13
    Abstract
  • To overcome the shortage that GPS-RTK can not obtain centimeter level high precision positioning results due to signal blockage, insufficient satellites number and other reasons under complicated environment, in this paper, the tightly combination of ultra-wide band (UWB) short-range high precision positioning system and RTK are studied to improve the precision of dynamic positioning under complicated environment. According to the principle of UWB, the mathematical model of GPS-RTK/UWB tight combination is presented, and the data processing flow is introduced in detail. The experimental results show that GPS-RTK/UWB tight combination can further improve the ambiguity fixed success rate and dynamic positioning precision compared with only GPS when the observation environment is well. In a complicated environment with a cut-off mask elevation angle of 40 degree, the ambiguity fixed success rate was significantly increased from 20.93% to 93.96%. The positioning precision of N and E directions are improved to centimeter level, and that of U directions is improved to decimeter level, which can still meet certain engineering measurement needs.

     

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