title: Precise positioning with current multi-constellation Global Navigation Satellite Systems: GPS, GLONASS, Galileo and BeiDou.
abstract: The world of satellite navigation is undergoing dramatic changes with the rapid development of multi-constellation Global Navigation Satellite Systems (GNSSs). At the moment more than 70 satellites are already in view, and about 120 satellites will be available once all four systems (BeiDou + Galileo + GLONASS + GPS) are fully deployed in the next few years. This will bring great opportunities and challenges for both scientific and engineering applications. In this paper we develop a four-system positioning model to make full use of all available observations from different GNSSs. The significant improvement of satellite visibility, spatial geometry, dilution of precision, convergence, accuracy, continuity and reliability that a combining utilization of multi-GNSS brings to precise positioning are carefully analyzed and evaluated, especially in constrained environments.
authors: 1] School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, 430079, Wuhan, Hubei, China [2] German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany.
authors: Xingxing
authors: X
authors: Li
authors: School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, 430079, Wuhan, Hubei, China.
authors: Xiaohong
authors: X
authors: Zhang
authors: School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, 430079, Wuhan, Hubei, China.
authors: Xiaodong
authors: X
authors: Ren
authors: German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany.
authors: Mathias
authors: M
authors: Fritsche
authors: German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany.
authors: Jens
authors: J
authors: Wickert
authors: German Research Centre for Geosciences (GFZ), Telegrafenberg, 14473 Potsdam, Germany.
authors: Harald
authors: H
authors: Schuh