Proceedings ArticleDOI
Comparing the ‘Big 4’ - A User's View on GNSS Performance
Oliver Montenbruck,Peter Steigenberger,André Hauschild +2 more
- pp 407-418
TLDR
The determination and prediction of GNSS satellite orbits and clocks from measurements of global receiver networks, which forms the basis for precise point positioning applications, are discussed and the significance of satellite metadata knowledge is highlighted.Abstract:
With BeiDou-3 and Galileo complementing the legacy systems GPS and GLONASS, a total of four global navigation satellite systems (GNSS) has now become available that offer free and ubiquitous access to accurate positioning, navigation, and timing (PNT). Following an overview of the system status and capabilities, we compare the Big 4 GNSSs in terms of signal and clock characteristics. The signal-in-space range error (SISRE) are assessed and related to the achievable single-point positioning accuracy. Furthermore, service stability and availability aspects are adressed. With respect to geodetic users, we discuss the determination and prediction of GNSS satellite orbits and clocks from measurements of global receiver networks, which forms the basis for precise point positioning applications. Within the International GNSS Service (IGS) various analysis centers independently provide such products based on data of the IGS multi-GNSS network. The challenges in generating precise orbit and clock solutions for the individual constellations are discussed, and the significance of satellite metadata knowledge is highlighted.read more
Citations
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Journal ArticleDOI
Featured services and performance of BDS-3
TL;DR: The results show that the inter-satellite link (ISL) contributes a lot to the accuracy improvement of orbit determination and time synchronization for the whole constellation.
Principle and performance of BDSBAS and PPP-B2b of BDS-3
Journal ArticleDOI
Past, present and future of atomic clocks for GNSS
TL;DR: In this article, the authors discuss how far and in what directions, atomic clock technology should be pushed to provide maximum benefits to GNSS performance, reliability and cost, and provide a baseline by reviewing current GNSS satellite atomic clock technologies.
Journal ArticleDOI
Multi-GNSS Combined Orbit and Clock Solutions at iGMAS
TL;DR: In this paper , a combination method of iGMAS orbit and clock products is described, and the performance of the combined solutions is evaluated by various means, which indicates that consistent weights should be assigned for individual constellations and analysis centers included in the combination.
Performance Evaluation of the Early CNAV Navigation Message
TL;DR: In this article, a signal-in-space range error (SISRE) of about 1.1 m is obtained for the CNAV message whereas it is 0.6 m for the legacy navigation message (LNAV).
References
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Calibration of Multipath Errors on GPS Pseudorange Measurements
TL;DR: This multipath calibration will help not only static user but also kinematic survey and real-time DGPS users to solve cycle ambiguities faster and more reliably and will also help reduce errors in ionospheric time delay measurements for dual-frequency users.
Journal ArticleDOI
GLONASS ambiguity resolution of mixed receiver types without external calibration
TL;DR: A calibration-free method for GLONASS ambiguity resolution is presented in which ambiguities naturally converge to integers, which permits the integration of different receiver types and firmware versions into seamless processing.
Journal ArticleDOI
The GPS Block IIR and IIR-M Broadcast L-band Antenna Panel: Its Pattern and Performance
Willard Marquis,Daniel L. Reigh +1 more
TL;DR: Both antenna panel versions, their broadcast signal patterns, the performance observed in factory testing, and their on-orbit performance are described, showing that all specification requirements are exceeded.
Cboc - an implementation of mboc
Jose-Angel Avila-Rodriguez,Stefan Wallner,Günter W. Hein,Emilie Rebeyrol,Olivier Julien,Christophe Macabiau,Lionel Ries,Antoine Delatour,Laurent Lestarquit,Jean-Luc Issler +9 more
TL;DR: In this paper, the authors proposed an optimized E1 OS and L1C spreading modulations that enable receivers to obtain significantly better performance in multipath than with previously considered BOC(1,1) modulations, along with other potential benefits.
Journal ArticleDOI
Flex power on GPS Block IIR-M and IIF
TL;DR: In this paper, the impact of flex power on the tracking and measurements of geodetic receivers is investigated with a 30m high-gain antenna, showing an increase of P(Y)-code power by 5 and 6 dB for L1 and L2, respectively, due to deactivation of the military M-code on both frequencies.
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