The multipath effect caused by the reflection of satellite signals by objects before reaching the receiver will seriously affect the accuracy of satellite navigation systems.
Existing solutions, such as sidereal filtering (SF) and system-specific MHM, require observation of at least one complete satellite orbit repetition period (e.g., 10 days for the Galileo satellite navigation system) to reconstruct the satellite geometry relative to the ground station.
As a result, SF and MHM have limited utility because changes can occur around the ground station over a long period of time.
Faced with the challenges posed by these impacts, the top priority is to develop more advanced and flexible solutions to improve multipath modeling efficiency and GNSS positioning accuracy.
, According to foreign media reports, the Satellite Navigation and Positioning Technology Research Center of Wuhan University (GNSS Research Center at Wuhan University) Led by Professor Geng Jianghui and from the Chinese Academy of Sciences A new study by a team of experts from the Chinese Academy of Sciences and The University of Tokyo used data from 21 European sites to deepen researchers ‘understanding of GPS, Galileo and BDS-3 systems, and highlights the effectiveness of using overlapping frequency signals in applications requiring high precision.
, In addition, the researchers introduced this multipath modeling module in the open source software PRIDE PPP-AR v3.
1, providing an effective tool for GNSS high-precision positioning applications to mitigate multipath effects.
The research results have been published in the journal Satellite Navigation.
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