Toward Real-Time GNSS Single-Frequency Precise Point Positioning Using Ionospheric Corrections

Real−time single−frequency precise point positioning (PPP) is a promising low−cost technique for achieving high−precision navigation with sub−meter or centimeter−level accuracy. However, its effectiveness depends heavily on the availability and quality of real−time ionospheric state estimations required correcting delay in global satellite system (GNSS) signals. In this study, dynamic mode decomposition (DMD) model used vertical total electron content (vTEC) RMS maps to construct 24 h vTEC map forecasts. These forecasts are assimilated C1P forecast products, L1 solutions compared different correction models. The study examines impact assimilating predicted data evaluates presented approach’s practicality utilizing IGRG product. results show that IGSG prediction−based improves accuracy up five hours ahead achieves comparable other models, making it obtaining navigation.