Abstract
Inter-frequency clock bias (IFCB) has to be corrected especially in multi-frequency positioning with high precision, it is composed of phase inter-frequency bias (phase IFB) and code inter-frequency bias (code IFB). Based on BDS-3, we propose a more robust phase IFB estimation strategy to detect and eliminate cycle slips. As for code IFB, there are two ways, one is derived from DCB products, called ‘DCBCorr’, the other is derived from the geometry-free and ionosphere-free combination, called ‘GFIFCorr’. However, these two methods are inconsistent because of the receiver intra-frequency bias between B2I and B2b. To eliminate the inconsistency, we choose a reference satellite for BDS-2 and BDS-3 respectively. Finally, the effectiveness as well as compatibility of ‘DCBCorr’ and ‘GFIFCorr’ are assessed using precise point positioning (PPP). Results indicate that the phase IFB estimation method we proposed removing outliers much cleaner. Compared with no corrections, positioning accuracy of ‘DCBCorr’ is improved by 2.37 m, while it is 2.23 m for ‘GFIFCorr’, they show an agreement of 0.47 ns and can be considered consistent.
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Lyu, S., Xiang, Y., Yu, W., Wang, W. (2021). BDS-3 Triple Frequency Satellite Inter-frequency Clock Bias Estimation and Its Effects on Precise Point Positioning. In: Yang, C., Xie, J. (eds) China Satellite Navigation Conference (CSNC 2021) Proceedings. Lecture Notes in Electrical Engineering, vol 772. Springer, Singapore. https://doi.org/10.1007/978-981-16-3138-2_44
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DOI: https://doi.org/10.1007/978-981-16-3138-2_44
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