Print Email Facebook Twitter Multi-GNSS PPP-RTK Title Multi-GNSS PPP-RTK: From large- to Small-Scale networks Author Nadarajah, Nandakumaran (Curtin University) Khodabandeh, Amir (Curtin University) Wang, Kan (Curtin University) Choudhury, Mazher (Curtin University) Teunissen, P.J.G. (TU Delft Mathematical Geodesy and Positioning; Curtin University) Date 2018-04-03 Abstract Precise point positioning (PPP) and its integer ambiguity resolution-enabled variant, PPP-RTK (real-time kinematic), can benefit enormously from the integration of multiple global navigation satellite systems (GNSS). In such a multi-GNSS landscape, the positioning convergence time is expected to be reduced considerably as compared to the one obtained by a single-GNSS setup. It is therefore the goal of the present contribution to provide numerical insights into the role taken by the multi-GNSS integration in delivering fast and high-precision positioning solutions (sub-decimeter and centimeter levels) using PPP-RTK. To that end, we employ the Curtin PPP-RTK platform and process data-sets of GPS, BeiDou Navigation Satellite System (BDS) and Galileo in stand-alone and combined forms. The data-sets are collected by various receiver types, ranging from high-end multi-frequency geodetic receivers to low-cost single-frequency mass-market receivers. The corresponding stations form a large-scale (Australia-wide) network as well as a small-scale network with inter-station distances less than 30 km. In case of the Australia-wide GPS-only ambiguity-float setup, 90% of the horizontal positioning errors (kinematic mode) are shown to become less than five centimeters after 103 min. The stated required time is reduced to 66 min for the corresponding GPS + BDS + Galieo setup. The time is further reduced to 15 min by applying single-receiver ambiguity resolution. The outcomes are supported by the positioning results of the small-scale network. Subject Carrier phase ambiguity resolutionGlobal Navigation Satellite Systems (GNSS)Ionosphere weighted modelNetwork in-loopPPP-RTK network and user To reference this document use: http://resolver.tudelft.nl/uuid:91bae1df-939e-4b7c-ad6f-310977978baf DOI https://doi.org/10.3390/s18041078 ISSN 1424-8220 Source Sensors, 18 (4) Part of collection Institutional Repository Document type journal article Rights © 2018 Nandakumaran Nadarajah, Amir Khodabandeh, Kan Wang, Mazher Choudhury, P.J.G. Teunissen Files PDF sensors_18_01078.pdf 7.79 MB Close viewer /islandora/object/uuid:91bae1df-939e-4b7c-ad6f-310977978baf/datastream/OBJ/view