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A Novel Un-differenced PPP-RTK Concept

Published online by Cambridge University Press:  14 October 2011

Baocheng Zhang ,
Peter J.G. Teunissen  and
Dennis Odijk
Baocheng Zhang*
Affiliation:
(Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, China)
Peter J.G. Teunissen*
Affiliation:
(GNSS Research Centre, Curtin University of Technology, Perth, Australia) (Delft Institute of Earth Observation and Space Systems, Delft University of Technology, The Netherlands)
Dennis Odijk
Affiliation:
(GNSS Research Centre, Curtin University of Technology, Perth, Australia)
*
(Email: b.zhang@whigg.ac.cn)
(Email: p.teunissen@curtin.edu.au)
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Abstract

In this contribution, a novel un-differenced (UD) (PPP-RTK) concept, i.e. a synthesis of Precise Point Positioning and Network-based Real-Time Kinematic concept, is introduced. In the first step of our PPP-RTK approach, the UD GNSS observations from a regional reference network are processed based upon re-parameterised observation equations, corrections for satellite clocks, phase biases and (interpolated) atmospheric delays are calculated and provided to users. In the second step, these network-based corrections are used at the user site to restore the integer nature of his UD phase ambiguities, which makes rapid and high accuracy user positioning possible. The proposed PPP-RTK approach was tested using two GPS CORS networks with inter-station distances ranging from 60 to 100 km. The first test network is the northern China CORS network and the second is the Australian Perth CORS network. In the test of the first network, a dual-frequency PPP-RTK user receiver was used, while in the test of the second network, a low-cost, single-frequency PPP-RTK user receiver was used. The performance of fast ambiguity resolution and the high accuracy positioning of the PPP-RTK results are demonstrated.

Keywords

GNSSPPP-RTKInteger Ambiguity ResolutionSatellite Phase Bias
Type
Research Article
Information
The Journal of Navigation , Volume 64 , Supplement S1: Chinese Beidou and the Next Generation GNSS , November 2011 , pp. S180 - S191
Copyright
Copyright © The Royal Institute of Navigation 2011

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