Abstract
Multipath effect is a key factor to perform the precise positioning and navigation with GPS technique. Study on the pseudorange multipath effect at GPS station is conducted in the chapter. Pseudorange multipath effect at the station is computed using the linear combinations of the pseudorange and carrier phase observations. The amount of pseudorange multipath effect at the station is evaluated. Multi-day’s multipath effects are matched based on the repeat time of the GPS constellation. Then the correlation coefficients of matched multi-day’s multipath effects are calculated and analyzed. The results show that there is no high correlation between the adjacent days’ pseudorange multipath and the single-epoch multipath effect is problematic. The reasons for this contradiction include the data matching problem, the effect of the noise, the solving method of the constant part and the effect of tracking error, among which the solving method of the constant part is the most important factor. Then pseudorange observations are corrected with the pseudorange multipath effects. Estimating the kinematic coordinates of the site using the point positioning technique, the positioning from the corrected GPS data is more accurate than that from the raw data.
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Acknowledgments
This study is partially supported by the National Natural Science Foundation of China (grant No. 41374009 & 41274018), the Shandong Natural Science Foundation of China (grant No. ZR2013DM009), and the Key Laboratory of Advanced Engineering Surveying of NASMG, China (grant No. TJES1101 & TJES1203).
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Guo, J., Li, G., Kong, Q., Wang, S., Zong, G. (2014). On Site Pseudorange Multipath Effect on GPS Surveying. In: Liu, C. (eds) Principle and Application Progress in Location-Based Services. Lecture Notes in Geoinformation and Cartography. Springer, Cham. https://doi.org/10.1007/978-3-319-04028-8_9
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DOI: https://doi.org/10.1007/978-3-319-04028-8_9
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