Three carrier ambiguity resolution: distance-independent performance demonstrated using semi-generated triple frequency GPS signals |
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Authors: | Bofeng Li Yanming Feng Yunzhong Shen |
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Institution: | (1) Department of Surveying and Geo-Informatics Engineering, Tongji University, 200092 Shanghai, People’s Republic of China;(2) Faculty of Information Technology, Queensland University of Technology, GPO Box 2434, Brisbane, QLD, 4001, Australia |
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Abstract: | In spite of significant research in the development of efficient algorithms for three carrier ambiguity resolution, full performance
potential of the additional frequency signals cannot be demonstrated effectively without actual triple frequency data. In
addition, all the proposed algorithms showed their difficulties in reliable resolution of the medium-lane and narrow-lane
ambiguities in different long-range scenarios. In this contribution, we will investigate the effects of various distance-dependent
biases, identifying the tropospheric delay to be the key limitation for long-range three carrier ambiguity resolution. In
order to achieve reliable ambiguity resolution in regional networks with the inter-station distances of hundreds of kilometers,
a new geometry-free and ionosphere-free model is proposed to fix the integer ambiguities of the medium-lane or narrow-lane
observables over just several minutes without distance constraint. Finally, the semi-simulation method is introduced to generate
the third frequency signals from dual-frequency GPS data and experimentally demonstrate the research findings of this paper. |
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