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A unified method for enhanced GNSS precision

admin by admin
July 30, 2024
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A unified method for enhanced GNSS precision
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Interoperable multipath hemispherical map: A unified approach for enhanced GNSS precision
The satellite tv for pc tracks for the overlap-frequency indicators at station BAUT on day 319 of 2021. Service-phase multipath corrections are color-coded. Credit score: Satellite tv for pc Navigation (2024). DOI: 10.1186/s43020-024-00144-7

Multipath results, ensuing from satellite tv for pc indicators reflecting off objects earlier than reaching the receiver, significantly compromise the precision of satellite tv for pc navigation techniques. Present options like Sidereal Filtering and system-specific MHMs require observations spanning not less than one full cycle of satellite tv for pc orbit repeat interval (e.g., 10 days for Galileo) to breed the satellite tv for pc geometry towards floor stations.

As a consequence, the practicability of SF and MHM is restricted as a consequence of potential station-surrounding modifications over an extended interval. With the continued challenges these results current, it’s crucial to develop extra superior and versatile options to enhance multipath modeling effectivity and GNSS positioning precision.

A brand new examine, led by Jianghui Geng from the GNSS Analysis Heart at Wuhan College and co-authored by specialists from each the Chinese language Academy of Sciences and the College of Tokyo, utilized information from 21 European stations to boost our understanding of the GPS, Galileo, and BDS-3 techniques and likewise spotlight the efficacy of utilizing overlap-frequency indicators in functions demanding excessive precision.

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As well as, the researchers have launched this multipath modeling module throughout the open supply software program PRIDE PPP-AR v3.1, providing an environment friendly instrument to mitigate multipath results, helpful for GNSS high-precision positioning functions. The examine is revealed within the journal Satellite tv for pc Navigation.

The investigation entailed an in depth evaluation over 31 days of knowledge from 21 European stations, assessing the newly devised MHM_GEC mannequin towards established GNSS-specific MHMs and Sidereal Filtering methods. The findings revealed that MHM_GEC, which amalgamates information from the GPS, Galileo, and BDS-3 techniques, markedly excels in mitigating multipath results.

The MHM_GEC, constructed utilizing 5 to six days of knowledge, can improve positioning precision by 40%, outperforming the normal GNSS-specific MHMs and sidereal filtering established with 10 days of knowledge. This efficiency enhance is credited to the mannequin’s capability to successfully use overlap-frequency indicators from totally different constellations, markedly enhancing spatial decision, modeling effectivity, and multipath correction efficiency.

Dr. Yosuke Aoki, co-author and geospatial engineering skilled, remarked, “The interoperable MHM mannequin marks a important milestone in satellite tv for pc navigation applied sciences. It notably enhances the accuracy of positioning techniques, which is crucial for all the pieces from geodesy to autonomous automobiles.”

The potential impacts of this analysis are broad, set to rework industries that depend upon exact positioning, akin to maritime navigation, deformation monitoring and geodesy. By minimizing the margin of error, the interoperable MHM mannequin not solely boosts system reliability but additionally opens up new prospects for functions that require exceedingly exact location information.

Extra info:
Jianghui Geng et al, Multipath mitigation for GPS/Galileo/BDS-3 exact level positioning with overlap-frequency indicators, Satellite tv for pc Navigation (2024). DOI: 10.1186/s43020-024-00144-7

Supplied by
Wuhan College

Quotation:
Interoperable multipath hemispherical map: A unified method for enhanced GNSS precision (2024, July 30)
retrieved 30 July 2024
from https://techxplore.com/information/2024-07-interoperable-multipath-hemispherical-approach-gnss.html

This doc is topic to copyright. Other than any honest dealing for the aim of personal examine or analysis, no
half could also be reproduced with out the written permission. The content material is offered for info functions solely.



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