Title: Kinematic PPP Ambiguity Resolution with Aid of Map Matching
Author(s): Fei Liu
Published in: Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017)
September 25 - 29, 2017
Oregon Convention Center
Portland, Oregon
Pages: 4176 - 4183
Cite this article: Liu, Fei, "Kinematic PPP Ambiguity Resolution with Aid of Map Matching," Proceedings of the 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, September 2017, pp. 4176-4183.
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Abstract: *ION GNSS+ 2017 Student Paper Award Winner* With satellite augmentation corrections (fractional cycle corrections) or specific precise clock products (decoupled or integer clock), Precise Point Positioning (PPP) integer ambiguity resolution (AR) using just one receiver can be achieved. However, it is quite challenging and takes long time for PPP to fix the ambiguities in kinematic mode (e.g. mounted on a land vehicle), due to large noise and lack of dynamic information without other sensors. In this paper, a new method using map matching (MM) to quickly fix the PPP ambiguities in short time is proposed. The projected points of the float solutions on the precise digital map can provide position and azimuth information for the system, which would improve the positioning accuracy and shorten the ambiguity convergence time because of strengthened positioning model. A land vehicle field test verified the method proposed and the results show that the ambiguities can be fixed within 10 minutes and the horizontal accuracy is at centimeter level.