Multipath mitigation based on trend surface analysis applied to dual-antenna receiver with common clock

摘要: Multipath mitigation methods based on the intrinsic spatiotemporal repeatability of multipath effect are commonly applied in high-precision Global Navigation Satellite System positioning. Among which hemispherical map (MHM) has advantages simplicity calculation and real-time reduction static environment or some dynamic environment. However, utilizing average residuals as calibration values will inevitably lead to insufficient excessive modification lattice. We proposed an advanced elimination method named trend surface analysis-based (T-MHM), extends primary MHM by combining analysis investigate spatial distribution each A short baseline experiment was carried out using a dual-antenna receiver with common clock campus East China Normal University. Single-difference carrier were used for relative modeling. The results indicate that, compared original approach, T-MHM improves dispersion accuracy solution increases phase observation rate. It also enhances modeling information both low- high-frequency bands. Meanwhile, is less sensitive lattice size. In practical applications, larger size can be adopted improve computational efficiency coverage little loss accuracy.