caa a22 4500 606162127 CHVBK 20210128100637.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10291-014-0374-8 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0374-8 Multipath analysis of code measurements for BeiDou geostationary satellites [Elektronische Daten] [Guangxing Wang, Kees de Jong, Qile Zhao, Zhigang Hu, Jing Guo] Having non-negligible impact on the code range observables, multipath delay is one of the error sources that limit GNSS positioning accuracy. Due to the relatively stationary geometry, multipath effects for signals from geostationary earth orbit (GEO) satellites are even more difficult to mitigate by merely increasing the observing periods or averaging over multiple epochs. To investigate the characteristics of code, multipath effects for the BeiDou Navigation Satellite System (BDS) GEO satellites, a linear combination of observations reflecting code multipath was employed and BDS multipath time series over long periods were analyzed with the Fourier transform, correlation and wavelet transform. The amplitudes of GEO multipath series vary from <1.0m to around 2.0m, and the periods of the dominant daily repeating components fall between 86,130 and 86,280s. The low-frequency components were extracted, and most cross-correlation coefficients between the low-frequency components of two consecutive days are larger than 0.7. When the low-frequency components of the first day are subtracted from the multipath time series of the second day, a decrease of more than 25% is found in terms of the code standard deviations. By correcting the observables with low-frequency multipath of the previous day, the precisions of code-only single-point positioning using ionosphere-free linear combination of BDS first and second or first and third frequencies can be improved. Precision improvements in north, east and up components for two stations in Perth, Australia were shown to be 0.2, 0.5 and 0.4m, and 0.3, 0 and 0.5m, respectively. Springer-Verlag Berlin Heidelberg, 2014 Multipath nationallicence BDS nationallicence GEO nationallicence Single-point positioning nationallicence Low frequency nationallicence Wang Guangxing Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut de Jong Kees Fugro Intersite B.V., Dillenburgsingel 69, 2263 HW, Leidschendam, The Netherlands aut Zhao Qile Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut Hu Zhigang Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut Guo Jing Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 129-139 1080-5370 19:1<129 2015 19 10291 https://doi.org/10.1007/s10291-014-0374-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0374-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Guangxing Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- de Jong Kees Fugro Intersite B.V., Dillenburgsingel 69, 2263 HW, Leidschendam, The Netherlands aut NATIONALLICENCE 700 1- Zhao Qile Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- Hu Zhigang Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 700 1- Guo Jing Research Center of GNSS, Wuhan University, 129 Luoyu Road, 430079, Wuhan, China aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 129-139 1080-5370 19:1<129 2015 19 10291