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Global Navigation Satellite System Multipath Mitigation Using a Wave-Absorbing Shield.

Haiyan Yang1,2,3, Xuhai Yang4,5, Baoqi Sun6,7

  • 1National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China. yanghy@ntsc.ac.cn.

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Summary
This summary is machine-generated.

A novel wave-absorbing shield effectively mitigates code multipath errors in Global Navigation Satellite System (GNSS) observations. This technique significantly improves positioning accuracy for BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), and GLONASS.

Keywords:
global navigation satellite system (GNSS)multipathsingle-point positioning (SPP)wave-absorbing shield

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Area of Science:

  • Geodesy and Geomatics
  • Satellite Navigation Systems
  • Signal Processing

Background:

  • Code multipath is a significant unmanaged error source limiting precise Global Navigation Satellite System (GNSS) positioning accuracy.
  • Existing mitigation techniques often have limitations in effectiveness or applicability.

Purpose of the Study:

  • To introduce and evaluate a novel wave-absorbing shield for mitigating code multipath errors in GNSS observations.
  • To assess the impact of the shield on positioning accuracy across multiple satellite constellations.

Main Methods:

  • Designed a wave-absorbing shield based on GNSS signal requirements.
  • Installed shields at iGMAS KUN1 and SHA1 sites.
  • Collected code and carrier phase measurements from BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), and GLONASS before and after installation.
  • Analyzed multipath mitigation and its effect on single-point positioning (SPP) accuracy.

Main Results:

  • Multipath errors were reduced by 17%-36% across all frequencies for BDS, GPS, and GLONASS.
  • Three-dimensional positioning accuracy improved by 0.49-1.07 m at KUN1 and 0.72-0.79 m at SHA1.
  • The wave-absorbing shield demonstrated effective mitigation of multipath in original GNSS observations.

Conclusions:

  • The developed wave-absorbing shield is a viable technique for mitigating code multipath errors in GNSS.
  • The shield installation leads to substantial improvements in the positioning accuracy of multi-constellation GNSS.
  • This method offers a practical solution for enhancing the reliability of precise GNSS applications.