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Sensors 2016, 16(8), 1332; doi:10.3390/s16081332

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

1,2,3,* , 1,3
,
1,3
and
1,2,3
1
National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China
*
Author to whom correspondence should be addressed.
Received: 3 July 2016 / Revised: 1 August 2016 / Accepted: 16 August 2016 / Published: 22 August 2016
(This article belongs to the Section Remote Sensors)
View Full-Text   |   Download PDF [4249 KB, uploaded 22 August 2016]   |  

Abstract

Code multipath is an unmanaged error source in precise global navigation satellite system (GNSS) observation processing that limits GNSS positioning accuracy. A new technique for mitigating multipath by installing a wave-absorbing shield is presented in this paper. The wave-absorbing shield was designed according to a GNSS requirement of received signals and collected measurements to achieve good performance. The wave-absorbing shield was installed at the KUN1 and SHA1 sites of the international GNSS Monitoring and Assessment System (iGMAS). Code and carrier phase measurements of three constellations were collected on the dates of the respective installations plus and minus one week. Experiments were performed in which the multipath of the measurements obtained at different elevations was mitigated to different extents after applying the wave-absorbing shield. The results of an analysis and comparison show that the multipath was mitigated by approximately 17%–36% on all available frequencies of BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), and Global Navigation Satellite System (GLONASS) satellites. The three-dimensional accuracies of BDS, GPS, and GLONASS single-point positioning (SPP) were, respectively, improved by 1.07, 0.63 and 0.49 m for the KUN1 site, and by 0.72, 0.79 and 0.73 m for the SHA1 site. Results indicate that the multipath of the original observations was mitigated by using the wave-absorbing shield. View Full-Text
Keywords: global navigation satellite system (GNSS); wave-absorbing shield; multipath; single-point positioning (SPP) global navigation satellite system (GNSS); wave-absorbing shield; multipath; single-point positioning (SPP)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, H.; Yang, X.; Sun, B.; Su, H. Global Navigation Satellite System Multipath Mitigation Using a Wave-Absorbing Shield. Sensors 2016, 16, 1332.

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