Comparing Multi-constellation and Multi-frequency Based on GPS/ BeiDou RTK Positioning

J. Dou and K. O'Keefe

Abstract:	BeiDou is the independent navigation satellite system of China. The second version of the BeiDou Interface-Control-Document (ICD) published the information defining the B2 signal in 2013 enabling the application of dual frequency BeiDou techniques. To evaluate the performance of BeiDou in terms of precise differential positioning, some research of GPS/BeiDou RTK positioning has been conducted in the Asia-Pacific region. This paper implements the GPS/BeiDou RTK positioning in order to demonstrate whether current BeiDou can augment the GPS system in North America. Three frequency combinations, L1 only, L1 and L2, and wide-lane are implemented and tested over different baseline lengths. GPS only solutions and GPS/BeiDou solutions are compared. The availability and geometry, the accuracy of float and fixed positioning solution, and the time to fix the ambiguities are presented and analyzed. BeiDou signals are shown to have the same level of CN0 as GPS and the addition of a limited number of available BeiDou signals helps to improve the positioning accuracy over very short and medium baselines.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	2317 - 2325
Cite this article:	Dou, J., O'Keefe, K., "Comparing Multi-constellation and Multi-frequency Based on GPS/ BeiDou RTK Positioning," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 2317-2325.
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