Abstract
The current GPS clock products are based on P 1–P 2 ionosphere-free (IF) observation combinations. Upon conducting single point positioning (SPP) by C 1 and P 2 observations, C 1–P 1 instrumental biases should be eliminated from the clock products. The BDS offers triple frequency signals with I 2–I 6 and I 7–I 6 instrumental biases. The current BDS clock products are based on I 6 observations, but some receivers can only get the I 2–I 6 instrumental biases. Upon conducting SPP by I 2 and I 7 observations, I 2–I 7 instrumental biases should be eliminated. We study a single station based method for instrumental bias estimation, and proceed to analyze the effect on SPP. Compared with the IGG products, the average accuracy of the estimated instrumental biases is 0.30 ns for C 1–P 1 and 0.86 ns for I 2–I 7. With the C 1–P 1 instrumental biases eliminated for GPS, the accuracy of SPP improves by 34% and the middle error of unit weight declines by 37%. With the I 2–I 7 instrumental biases eliminated for BDS, the accuracy of SPP improves by 33% and the middle error of unit weight declines by 50%.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (Grant Nos.11473045, 11403045 and 11503040).
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Lu, W., Ma, G. (2017). The Application of Instrumental Bias Estimation to Single Point Positioning. In: Sun, J., Liu, J., Yang, Y., Fan, S., Yu, W. (eds) China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume III. CSNC 2017. Lecture Notes in Electrical Engineering, vol 439. Springer, Singapore. https://doi.org/10.1007/978-981-10-4594-3_24
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DOI: https://doi.org/10.1007/978-981-10-4594-3_24
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