Abstract
The BeiDou-3 global satellite navigation system (BDS-3) provides two radio determination satellite service (RDSS) positioning services for users, i.e., the traditional RDSS (TRDSS) positioning of the BeiDou-2 regional satellite navigation system, and the comprehensive RDSS (CRDSS) positioning, which integrates the RDSS and radio navigation satellite service. As published studies regarding the RDSS positioning service are few, we analyze and compare the performances of the two RDSS positioning modes. First, we systematically investigate the principles of the TRDSS and CRDSS positioning, and then analyze the evaluation methods in terms of their positioning accuracy, real time, and coverage range. Second, based on the BeiDou RDSS measured data, we evaluate the performances of the TRDSS and CRDSS positioning. Compared with TRDSS positioning, CRDSS positioning exhibits the following: 1) A significant increase in positioning accuracy, resulting in error improvement from 8 to 2 m and root mean square improvement from 3.13 to 0.85 m; in other words, the positioning error, constant deviation, and stability improve significantly. 2) The real time reduces slightly from 1.1 to 1.8 ns, which is within the acceptable range. 3) The coverage range expands from the areas of 62°E–145°E and 5°N–55°N to the areas of 50°E–170°E and 0°N–70°N, respectively. 4) CRDSS positioning is not restricted by the constraints of the digital elevation database or the user elevation information and can thus solve the occlusion problem effectively.
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The data used are available from the BeiDou Satellite Navigation Center.
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Acknowledgements
We would like to thank the BeiDou Satellite Navigation Center and the National Natural Science Foundation of China (Nos. 41874043, 61603397, and 41704037). Additionally, we would like to thank the reviewers for their constructive comments.
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Dongxia Wang received her Ph.D. degree from Beihang University, China, in 2013. She is an engineer at the Bei**g Satellite Navigation Center, China. Her current research interests are time synchronization and inter-satellite link technology.
Rui Guo received his Ph.D. degree from Shanghai Astronomical Observatory, Chinese Academy of Sciences, China, in 2010. He is a senior engineer at the Bei**g Satellite Navigation Center, China. His current research interests are global navigation satellite systems (GNSS) satellite orbit determination and time synchronization.
Nan **ng received her Ph.D. degree from Shanghai Astronomical Observatory, Chinese Academy of Sciences, China, in 2013. She is an assistant professor at Bei**g Normal University, China. Her current research interests are satellite navigation and time synchronization.
Zhijun Liu received his Ph.D. degree from National University of Defense Technology, China, in 2020. He is an engineer at the Bei**g Satellite Navigation Center, China. His current research interests are time synchronization and satellite navigation technology.
Tianqiao Zhang received his master degree from Tsinghua University, China, in 2012. He is a senior engineer at the Bei**g Satellite Navigation Center, China. His current research interest is signal processing in global navigation satellite systems (GNSS).
Hui Ren received his master degree from National University of Defense Technology, China, in 2005. He is a senior engineer at the Bei**g Satellite Navigation Center, China. His current research interests are multi-source data processing and radio determination satellite service (RDSS) timing technology.
**aojie Li received her master and Ph.D. degrees from Information Engineering University, China, in 2009 and 2012, respectively. She is an engineer at the Bei**g Satellite Navigation Center, China. Her current research interests are global navigation satellite systems (GNSS) satellite orbit determination and time synchronization.
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Wang, D., Guo, R., **ng, N. et al. Performance analysis of two RDSS positioning modes of BeiDou-3 system. Astrodyn 6, 317–327 (2022). https://doi.org/10.1007/s42064-022-0140-6
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DOI: https://doi.org/10.1007/s42064-022-0140-6