Dr. Shuguo Pan Profile

Dr. Shuguo Pan

at Southeast Univ

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Publications (2)

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Proceedings Article | 3 April 2010 Paper

The method of low-orbit satellite ambiguity fixing on network RTK

Shuguo Pan, Qing Wang, Shanshan Wang, Fuyang Ke

Proceedings Volume 7651, 76510A (2010) https://doi.org/10.1117/12.855492

KEYWORDS: Satellites, Troposphere, Algorithm development, Error analysis, Global Positioning System, Reliability, Systems modeling, Intellectual property, Geodesy, Data processing

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Low-orbit satellite ambiguity fixing is the import factor affecting GPS network difference reliability. In this paper, the satellite will be selected as reference satellite by elevation angle of satellite and barycenter of triangle to construct weight matrix. Quickly resolving double difference wide ambiguity based on wide-lane combination, fixing ambiguity of L1/L2 by LAMBDA algorithm, estimating troposphere error in non-ionosphere combination by HOPFIELD model, improving 0.3cycle float ambiguity accuracy of low elevation angle satellite, applying this method to develop network differential systems by our own intellectual property rights. The actual tests show that: accessing to the system the actual mobile station position plane accuracy is better than 5cm.

Proceedings Article | 10 November 2007 Paper

Effects and mitigation of multipath on GPS/Galileo

Yi Zhao, Qing Wang, Shuguo Pan, Jun He

Proceedings Volume 6795, 67957P (2007) https://doi.org/10.1117/12.775465

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A conventional method to mitigate multipath errors in GNSS receivers is the strobe correlator, which achieves discriminator function shaping by combining two different narrow-correlator discriminators [1] [2]. The method performs a good performance when the difference in delays of direct and reflected signal is biggish in GPS scenario. Nevertheless, the performance of the method is not so good for Galileo scenario. The advent of the European navigation system Galileo has made it an exigent requirement to develop the receiver that can track Galileo signals as well as GPS signals. So, a better way should be groped for to mitigate both GPS and Galileo multipath errors. In the paper, a novel multipath mitigation scheme, named Early-Late Strobe Correlator (ELSC), was presented for both GPS and Galileo signals. By the Matlab simulation to the method, multipath errors could be mitigated effectively by using ELSC, especially to Galileo signals. The experiment results show that more excellent performances can be obtained by adopting ELSC presented in the paper with respected to the strobe correlator, although this will result in a more complex structure of discriminators.

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