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Open AccessArticle

Improving GLONASS Precise Orbit Determination through Data Connection

GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
German Research Center for Geosciences (GFZ), Telegrafenberg, Potsdam 14473, Germany
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Sensors 2015, 15(12), 30104-30114;
Received: 28 September 2015 / Revised: 12 November 2015 / Accepted: 27 November 2015 / Published: 2 December 2015
(This article belongs to the Section Physical Sensors)
In order to improve the precision of GLONASS orbits, this paper presents a method to connect the data segments of a single station-satellite pair to increase the observation continuity and, consequently, the strength of the precise orbit determination (POD) solution. In this method, for each GLONASS station-satellite pair, the wide-lane ambiguities derived from the Melbourne–Wübbena combination are statistically tested and corrected for phase integer offsets and then the same is carried out for the narrow-lane ambiguities calculated from the POD solution. An experimental validation was carried out using one-month GNSS data of a global network with 175 IGS stations. The result shows that, on average, 27.1% of the GLONASS station-satellite pairs with multiple data segments could be connected to a single long observation arc and, thus, only one ambiguity parameter was estimated. Using the connected data, the GLONASS orbit overlapping RMS at the day boundaries could be reduced by 19.2% in ideal cases with an averaged reduction of about 6.3%. View Full-Text
Keywords: GLONASS; data connection; precise orbit determination; orbit precision GLONASS; data connection; precise orbit determination; orbit precision
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Liu, Y.; Ge, M.; Shi, C.; Lou, Y.; Wickert, J.; Schuh, H. Improving GLONASS Precise Orbit Determination through Data Connection. Sensors 2015, 15, 30104-30114.

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