Abstract
Under satellite-deprived environments, the accuracy and continuity of the traditional GNSS-based attitude determination methods would be degraded. In this contribution, we derive the tightly coupled measurement-domain approach for single-frequency attitude determination, which could improve the performance of ambiguity resolution and attitude determination accuracy. However, the appearance of inter-system bias (ISB) and inter-frequency bias (IFB) are due to hardware delays and frequency inconsistencies between systems. Therefore, the time-domain stability of ISB is applied to construct ISB estimation observations, to eliminate the influence of ISB on integer ambiguity resolution. The narrowly spaced frequency of GPS L1 and BDS B1 effectively suppresses the influence of IFB by roughly estimating the single difference ambiguity of the pivot satellite at the same time. The kinematic and static experiments are conducted in simulated urban areas, which are based on single-frequency observations from GPS L1 and BDS B1. The result shows that the proposed method can enhance the accuracy and continuity of attitude determination when compared with the traditional MAD methods.
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Acknowledgements
This research was jointly funded by the National Natural Science Foundation of China (Nos. 61773132, 61633008, 61803115), the National Key Research and Development Program (No. 2017YFE0131400), the 7th Generation Ultra Deep Water Drilling Unit Innovation Project sponsored by Chinese Ministry of Industry and Information Technology, the Heilongjiang Province research Science Fund for Distinguished Young Scholars (No. JC2018019), and the Fundamental Research Funds for Central Universities (Nos. HEUCFP201768, 3072019CF0401).
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Li, J., Li, L., Jiang, J., Jia, C., Zhao, L. (2020). Single-Frequency GNSS-Based Measurement-Domain Attitude Determination Algorithm with Inter-system Bias Calibration. In: Sun, J., Yang, C., Xie, J. (eds) China Satellite Navigation Conference (CSNC) 2020 Proceedings: Volume II. CSNC 2020. Lecture Notes in Electrical Engineering, vol 651. Springer, Singapore. https://doi.org/10.1007/978-981-15-3711-0_26
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DOI: https://doi.org/10.1007/978-981-15-3711-0_26
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