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WANG Yu-ming, SHAO Li-min, ZHANG Shang-yue. Influence of roll and pitch on multipath effect of shipborne GNSS signal[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 167-177. doi: 10.19818/j.cnki.1671-1637.2019.02.015
Citation: WANG Yu-ming, SHAO Li-min, ZHANG Shang-yue. Influence of roll and pitch on multipath effect of shipborne GNSS signal[J]. Journal of Traffic and Transportation Engineering, 2019, 19(2): 167-177. doi: 10.19818/j.cnki.1671-1637.2019.02.015
shu

Influence of roll and pitch on multipath effect of shipborne GNSS signal

doi: 10.19818/j.cnki.1671-1637.2019.02.015
  • 1.

    Department of Underwater Weaponry and Chemical Defense, Dalian Naval Academy, Dalian 116018, Liaoning, China

  • 2.

    Department of Navigation, Dalian Naval Academy, Dalian 116018, Liaoning, China

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    Abstract
  • The ship related coordinate system and ship-based GNSS antenna correlation coordinate system were established, and the spatial position relationship model between the GNSS satellite and tilt antenna was constructed. Based on theoretical analysis and dynamic and static experiments, the variation rules of multipath effect of GNSS signal with the tilt angle of receiver antenna under ship swing condition were given. Analysis result shows that when the ship-based antenna is continuously at the swaying and tilting position by the roll and pitch effect, the variation of multipath effect of satellite signal is related to the antenna tilt direction, antenna tilt angle and the difference of satellite relative height angle. When the satellite faces the antenna tilted direction, the multipath effect of satellite signal with a relative height angle greater than the antenna tilt angle is not affected by the antenna attitude change. The multipath effect of satellite signal with a relative height angle smaller than the antenna tilt angle increases as the antenna tilt angle increases, and gradually becomes stable. When the satellite is in the opposite tilted direction of antenna, the multipath effect of satellite signal whose relative height angle is greater than the antenna tilt angle increases slowly with the increase of antenna tilt angle. While the multipath effect of satellite signal whose relative height angle is smaller than the antenna tilt angle increases significantly with the increase of antenna tilt angle, and even some satellite signals are completely unlocked. When the satellite is at the zenith position of inclined antenna, its multipath effect is not affected by the antenna tilt angle. Therefore, determining the signal confidence of each GNSS observation satellite according to the different attitudes of the ship can provide a solution for the error correction problem of dynamic precision positioning and measurement at sea.

     

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