The realization and convergence analysis of combined PPP based on raw observation |
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Authors: | Rui Tu Maorong Ge Hongping Zhang Guanwen Huang |
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Institution: | 1. The German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany;2. Potsdam University, Am Neuen Palais, 14469 Potsdam, Germany;3. Wuhan University, 129 Luoyu Road, 430079 Wuhan, Hubei, China;4. Chang An University, 126 Yanta Road, 710054 Xi’an, Shanxi, China |
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Abstract: | In order to speed up Precise Point Positioning (PPP)’s convergence, a combined PPP method with GPS and GLONASS which is based on using raw observations is proposed, and the positioning results and convergence time have been compared with that of single system. The ionospheric delays and receiver’s Differential Code Bias (DCB) corrections are estimated as unknown parameters in this method. The numerical results show that the combined PPP has not caused significant impacts on the final solutions, but it greatly improved Position Dilution of Precision (PDOP) and convergence speed and enhanced the reliability of the solution. Meanwhile, the convergence speed is greatly influenced by the receiver’s DCB, positioning results in horizontal which are better than 10 cm can be realized within 10 min. In addition, the ionosphere and DCB products can be provided with high precision. |
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Keywords: | GPS and GLONASS Precise Point Positioning Raw observation DCB Combine |
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