caa a22 4500 606162429 CHVBK 20210128100639.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10291-014-0411-7 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0411-7 Instantaneous ambiguity resolution for URTK and its seamless transition with PPP-AR [Elektronische Daten] [Xuan Zou, Weiming Tang, Chuang Shi, Jingnan Liu] We extend the current Undifferenced network RTK (URTK) approaches by additionally using P1/CA augmentation information from reference stations. P1/CA augmentation information can shorten the convergence time and help to fix the ionosphere-free combination ambiguities in several epochs. Instantaneous and centimeter-level positioning solutions can be achieved for rovers within the coverage of regional reference network. Also, we develop an approach for seamless transition between URTK and precise point positioning with ambiguity resolution (PPP-AR) and present a new scheme to provide URTK service. Therefore, a service for a large number of rovers can be easily realized in real-time data communication for ambiguity fixing. In addition, the period when augmentation information from a particular reference station is not available can be bridged with the help of PPP-AR. Rovers can experience more operational time with fewer interruptions, which are difficult tasks for current URTK and Network Real-Time Kinematic services. More importantly, with this new scheme, URTK and PPP-AR services can be integrated into a unique PPP-AR system. The obtained convergence time only depends on whether or not the rover is receiving the regional augmentation information. Springer-Verlag Berlin Heidelberg, 2014 Instantaneous ambiguity resolution nationallicence URTK nationallicence PPP-AR nationallicence Seamless transition nationallicence Bridge gaps nationallicence Zou Xuan GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut Tang Weiming GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut Shi Chuang GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut Liu Jingnan GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut GPS Solutions Springer Berlin Heidelberg 19/4(2015-10-01), 559-567 1080-5370 19:4<559 2015 19 10291 https://doi.org/10.1007/s10291-014-0411-7 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/s10291-014-0411-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zou Xuan GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- Tang Weiming GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- Shi Chuang GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- Liu Jingnan GNSS Research Center, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/4(2015-10-01), 559-567 1080-5370 19:4<559 2015 19 10291