PrideLab published their research on accelerating PPP ambiguity resolution using triple-frequency and multi-GNSS data. We investigated the efficiency of PPP-AR using triple-frequency multi-GNSS data. Undifferenced raw observations are directly processed in PPP while raw ambiguities are mapped at the normal equation level into their extra-wide-lane, widelane and narrow-lane counterparts for integer-cycle resolution. Since the positioning accuracy can be improved significantly after triple-frequency PPP-WAR (i.e.,Multi-frequency multi-GNSS PPP-AR (extra-)wide-lane ambiguity resolution) during the early stage of PPP convergences, narrow-lane ambiguity fixing which signifies a successful PPP initialization can thus be accomplished faster in case of triple-frequency data compared to dual-frequency data. This study can be taken as a demonstration for the PPP convergence efficiency in the prospect of future complete multi-frequency global constellations.

For more details, please refer to the paper:”Speeding up PPP ambiguity resolution using triple-frequency GPS/BeiDou/Galileo/QZSS data”

Link: https://eartharxiv.org/fhdq8/ or https://doi.org/10.1007/s00190-019-01330-1

Figure 1 Distribution of initialization times (minutes) for dual- and triple-frequency PPP-AR at all stations on all days.