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Reducing GPS carrier phase errors in the measurement and position domains for short-distance static relative positioning

Content Provider	Springer Nature Link
Author	Liu, Chao Lin, Peng Gao, Jingxiang Zhao, Xingwang
Copyright Year	2015
Abstract	In GPS short-distance static relative positioning (e.g. the length of the baseline shorter than several kilometers and its height difference less than tens of meters), the precision and accuracy of the baseline solutions are limited because of the existence of unmodeled errors especially multipath errors. Considering that multipath errors are mapped from original observations to the baseline solution (position domain) and its residual series (measurement domain), scholars have applied a number of methods to reduce multipath errors in residual series to improve the precision of the baseline solution. However, multipath errors are difficult to eliminate from the baseline solution. Therefore, this study proposes a new strategy for eliminating the multipath errors both in the position and measurement domains. The steps are as follows: (1) a post-processed kinematic (PPK) approach was used to obtain the coordinate and residual series with L$_{1}$ observations; (2) the empirical mode decomposition (EMD) was employed to extract multipath errors from the residual series to correct original observations; (3) PPK was used again to obtain the corrected coordinate series with the corrected observations; (4) finally, a multi-scale decomposition utilizing wavelet transform was applied to the corrected coordinate series to obtain the residual terms and their average values, the result of which is taken as the final baseline solution. The precision and accuracy of the baseline solution are evaluated according to the root mean square error (RMSE). The experimental results show that the accuracy of baseline solution are improved about 16, 24, and 28 % for 10 min time periods, respectively, 24, 25, and 33 % for 30 min time periods, respectively, and 5, 23, and 22 % for 60 min time periods, respectively, of the traditional scheme. The influence of multipath errors on the baseline solution are efficiently weakened.
Starting Page	81
Ending Page	93
Page Count	13
File Format	PDF
ISSN	22135812
Journal	Acta Geodaetica et Geophysica Hungarica
Volume Number	51
Issue Number	1
e-ISSN	22135820
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-04-19
Publisher Institution	Quarterly of the Hungarian Academy of Sciences
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multipath errors Post-processed kinematic (PPK) Baseline solution Geophysics/Geodesy GPS Static relative positioning
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geology Geophysics

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