Multipath mitigation for GPS/Galileo/BDS-3 precise point positioning with overlap-frequency signals

Multipath mitigation for GPS/Galileo/BDS-3 precise point positioning with overlap-frequency signals

Blog Article

Abstract Pool Heaters The multipath effect is a major Global Navigation Satellite System (GNSS) error source due to its environment-dependent characteristic, which complicates its mitigation process for the high-rate determination of displacements.For instance, Sidereal Filtering (SF) and Multipath Hemispherical Map (MHM) require the observations spanning at least one full cycle of satellite orbit repeat period (e.g.

, ten days for Galileo navigation satellite system (Galileo) to reproduce the satellite geometry against ground stations.As a consequence, the practicability of SF and MHM is limited due to potential station-surrounding changes over a long period.In this study, we used the overlap-frequency signals on Global Positioning System (GPS) L1/L5, Galileo E1/E5a, and BeiDou-3 Navigation Satellite System (BDS-3) B1C/B2a to construct an interoperable MHM (i.

e., MHM_GEC) across constellations to mitigate multipath more efficiently.We thus used 31 days of 1-Hz GPS/Galileo/BDS-3 data at 21 stations in Europe to compare this overlap-frequency MHM with those GNSS-specific MHMs (i.

e., MHM_G for GPS, MHM_E for Galileo, and MHM_C for BDS-3), as well as SF.It is confirmed that the multipath effects on overlap-frequency signals are of a high spatial consistency across all GNSS.

The mean reduction rate of applying MHM_GEC to GPS, Galileo, and Perennials BDS-3 copyright-phase residuals is 25%, 31%, and 28.5%, respectively, which are up to 25 percentage points higher than those of MHM_G, MHM_E, and MHM _C.Furthermore, the MHM_GEC constructed using 5 to 6 days of data can improve the positioning precision by 40%, outperforming the MHM_E, MHM_C, and SF using 10 days of data.

Therefore, the interoperable MHM_GEC is more efficient in mitigating multipath effects for high-precision GNSS positioning.