Modelling and Assessment of a New Triple-Frequency IF1213 PPP with BDS/GPS

The currently available triple-frequency signals give rise to new prospects for precise point positioning (PPP). However, they also bring bias, such as time-varying parts of the phase bias in hardware receivers and satellites due fact that dual-frequency clock products cannot be directly applied observation. These parameters generate phase-based inter-frequency (PIFCB), which impacts PPP. PIFCBs are not present all GNSSs. In this paper, various IF1213 PPP models constructed these parts, namely, PIFCB (TF-C) model with estimation, TF (IFB) (TF-F) ignoring PIFCB, TF-PIFCB-IFB (TF-CF) one system estimation. Additionally, study compares ionosphere-free (DF) model. We conducted single static PPP, dual-system kinematic experiments based on BDS/GPS observation data. GPS experiment demonstrates reliability TF-C model, well non-negligibility PIFCB. BDS TF-F TF-CF models, influence BDS-2 can neglected BDS. experimental results show third frequency does significantly improve accuracy but shortens convergence time. is better than 1.0 cm, while 2.0 cm 4.0 horizontal vertical components, respectively. Compared DF time improved by approximately 23.5%/18.1%, 13.6%/9.7%, 19.8%/12.1%, 46.2%/49.6%, 33.5%/32.4%, 35.1%/36.1% E, N U directions, For observations, recommended.