Analysis of regionally enhanced GPS orbit and clock solutions and contribution to improvement of real-time precise point positioning

Wang, Charles, Gu, Shengfeng, Zhang, Weixing, Shi, Chuang, & Feng, Yanming (2012) Analysis of regionally enhanced GPS orbit and clock solutions and contribution to improvement of real-time precise point positioning. Journal of Global Positioning Systems, 11(2), pp. 169-179.

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This work experimentally examines the performance benefits of a regional CORS network to the GPS orbit and clock solutions for supporting real-time Precise Point Positioning (PPP). The regionally enhanced GPS precise orbit solutions are derived from a global evenly distributed CORS network added with a densely distributed network in Australia and New Zealand. A series of computational schemes for different network configurations are adopted in the GAMIT-GLOBK and PANDA data processing. The precise GPS orbit results show that the regionally enhanced solutions achieve the overall orbit improvements with respect to the solutions derived from the global network only. Additionally, the orbital differences over GPS satellite arcs that are visible by any of the five Australia-wide CORS stations show a higher percentage of overall improvements compared to the satellite arcs that are not visible from these stations. The regional GPS clock and Uncalibrated Phase Delay (UPD) products are derived using the PANDA real time processing module from Australian CORS networks of 35 and 79 stations respectively. Analysis of PANDA kinematic PPP and kinematic PPP-AR solutions show certain overall improvements in the positioning performance from a denser network configuration after solution convergence. However, the clock and UPD enhancement on kinematic PPP solutions is marginal. It is suggested that other factors, such as effects of ionosphere, incorrectly fixed ambiguities, may be the more dominating, deserving further research attentions.

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ID Code: 59800
Item Type: Journal Article
Refereed: Yes
Keywords: Continuous Operating Reference Stations, Precise Orbit Determination, Precise Point Positioning, GAMIT-GLOBK Software, PANDA Software
DOI: 10.5081/jgps.11.2.169
ISSN: 1446-3156
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > DISTRIBUTED COMPUTING (080500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > GEOMATIC ENGINEERING (090900) > Navigation and Position Fixing (090904)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 CPGPS
Deposited On: 09 May 2013 00:49
Last Modified: 10 May 2013 00:26

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