NDLI: Impact of GLONASS pseudorange inter-channel biases on satellite clock corrections

Content Provider	Springer Nature Link
Author	Song, Weiwei Yi, Wenting Lou, Yidong Shi, Chuang Yao, Yibin Liu, Yanyan Mao, Yong Xiang, Yu
Copyright Year	2014
Abstract	GLONASS carrier phase and pseudorange observations suffer from inter-channel biases (ICBs) because of frequency division multiple access (FDMA). Therefore, we analyze the effect of GLONASS pseudorange inter-channel biases on the GLONASS clock corrections. Different Analysis Centers (AC) eliminate the impact of GLONASS pseudorange ICBs in different ways. This leads to significant differences in the satellite and AC-specific offsets in the GLONASS clock corrections. Satellite and AC-specific offset differences are strongly correlated with frequency. Furthermore, the GLONASS pseudorange ICBs also leads to day-boundary jumps in the GLONASS clock corrections for the same analysis center between adjacent days. This in turn will influence the accuracy of the combined GPS/GLONASS precise point positioning (PPP) at the day-boundary. To solve these problems, a GNSS clock correction combination method based on the Kalman filter is proposed. During the combination, the AC-specific offsets and the satellite and AC-specific offsets can be estimated. The test results show the feasibility and effectiveness of the proposed clock combination method. The combined clock corrections can effectively weaken the influence of clock day-boundary jumps on combined GPS/GLONASS kinematic PPP. Furthermore, these combined clock corrections can improve the accuracy of the combined GPS/GLONASS static PPP single-day solutions when compared to the accuracy of each analysis center alone.
Starting Page	323
Ending Page	333
Page Count	11
File Format	PDF
ISSN	10805370
Journal	GPS Solutions
Volume Number	18
Issue Number	3
e-ISSN	15211886
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-03-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	GLONASS Clock corrections Day-boundary jump Inter-channel bias Clock combination Geophysics/Geodesy Atmospheric Sciences Extraterrestrial Physics, Space Sciences Automotive Engineering Electrical Engineering
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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