caa a22 4500 606162119 CHVBK 20210128100637.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10291-014-0373-9 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0373-9 Locata-based precise point positioning for kinematic maritime applications [Elektronische Daten] [Wei Jiang, Yong Li, Chris Rizos] The GPS-precise point positioning (PPP) is still not as popular as network-based real-time kinematic (N-RTK) for engineering kinematic applications based on differential positioning principles for several reasons. One is the fact that the accuracy of kinematic GPS-PPP is lower than N-RTK solutions. The second reason is that GPS-PPP requires a comparatively long initialization period. In order to overcome such shortcomings, a new PPP approach augmented by a ground-based positioning system such as "Locata” is proposed in this paper. The new approach is referred to as Locata/GPS-PPP. Locata's ground-based technology has rapid geometry change for kinematic applications; thus, the proposed approach is able to provide high-accuracy solutions with faster initialization. In the proposed Locata/GPS-PPP approach, the Locata and GPS carrier phase measurements are processed simultaneously in a tightly combined mode and the carrier phase ambiguities are resolved as floating-point values on an epoch-by-epoch basis in order to avoid the need for cycle-slip repair. In order to evaluate the system performance, a kinematic field trial was conducted on Sydney Harbor. A Locata transmitter network was setup on the fringes of Sydney's CBD. The experiment demonstrated that the initial convergence time of the integrated Locata/GPS-PPP filter is only 10s, which is significantly faster than the conventional GPS-PPP method. Comparison of the proposed method with the GPS-PPP and Locata-single point positioning (SPP) approaches was conducted. The results confirm that the Locata/GPS-PPP approach can achieve centimeter-level accuracy for horizontal positioning which improves 36.4 and 68.8% over Locata-SPP and GPS-PPP. The results validate the effectiveness of the proposed approach for high-accuracy maritime applications. Springer-Verlag Berlin Heidelberg, 2014 Locata nationallicence GPS-PPP nationallicence Locata/GPS-PPP nationallicence Maritime navigation nationallicence Jiang Wei School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut Li Yong School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut Rizos Chris School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 117-128 1080-5370 19:1<117 2015 19 10291 https://doi.org/10.1007/s10291-014-0373-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0373-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jiang Wei School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut NATIONALLICENCE 700 1- Li Yong School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut NATIONALLICENCE 700 1- Rizos Chris School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 117-128 1080-5370 19:1<117 2015 19 10291