Analysis of regionally enhanced GPS orbit and clock solutions and contribution to improvement of real-time precise point positioning
Data(s) |
2012
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Resumo |
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. |
Identificador | |
Publicador |
International Association of Chinese Professionals in Global Positioning Systems |
Relação |
DOI:10.5081/jgps.11.2.169 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. |
Direitos |
Copyright 2012 CPGPS |
Fonte |
School of Electrical Engineering & Computer Science; Science & Engineering Faculty |
Palavras-Chave | #080500 DISTRIBUTED COMPUTING #090904 Navigation and Position Fixing #Continuous Operating Reference Stations #Precise Orbit Determination #Precise Point Positioning #GAMIT-GLOBK Software #PANDA Software |
Tipo |
Journal Article |