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Liwen Dai
Present
Position:
Software Engineer at Magellan/Thales (PhD granted 5th August 2002)
Education:
B.Sc. (Hons), Wuhan Technical University of Surveying and Mapping, P.R. China , 1995.
M.Sc., Wuhan Technical University of Surveying and Mapping, P.R. China , 1998.
Ph.D., The University of New South Wales, Sydney, Australia, 2002.
Short Biography:
Liwen Dai received a B.Sc. and M.Sc. in Geodesy in 1995 and 1998, respectively, from the Wuhan Technical University of Surveying and Mapping, P.R. China, and then joined the School of Surveying & Spatial Information Systems (formerly the School of Geomatic Engineering), The University of New South Wales, as a Visiting Fellow in November 1998. Since the start of 2000, he had been a full-time PhD student at UNSW. His research interests have been software and algorithm development for rapid static and kinematic positioning (and attitude determination) using integrated GPS, GLONASS and pseudolite systems. He submitted his thesis for examination in early 2002, and received notification of the granting of his Ph.D. on the 5th August 2002.
Publications:
Dai L. (2000), Dual-frequency GPS/GLONASS real-time ambiguity resolution for medium-range kinematic positioning. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 1071-1080. (Download PDF)
Dai L. (2002), Augmentation of GPS with Glonass and Pseudolite Signals for Carrier Phase-Based Kinematic Positioning. PhD thesis, School of Surveying & Spatial Information Systems, University of New South Wales, Sydney, Australia, UNISURV S-72, ISBN 0-7334-1975-5, 187pp.
Dai L., S. Han & C. Rizos (1999), An outlier detection algorithm for instantaneous ambiguity resolution for carrier phase-based GNSS positioning. Int. Symp. on Digital Earth, Beijing, P.R. China, 29 November - 2 December, 321-332.
Dai L., S. Han & C. Rizos (2001), Performance analysis of integrated GPS/GLONASS carrier phase-based positioning. Journal of Geospatial Information Science, 4(4), 9-18. (Download PDF)
Dai L., S. Han, J., Wang & C. Rizos (2001), A study of GPS/GLONASS multiple reference station techniques for precise real-time carrier phaseÐbased positioning. 14th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 11-14 September, 392-403. (Download PDF)
Dai L. & J. Liu (1998), GPS data automatic transfer and realization in the Geheyan Dam deformation monitoring system. Journal of Wuhan Technical University of Surveying & Mapping, 23, Suppl. 28-31.
Dai L., C. Rizos & S. Han (2003), An adaptive procedure for carrier phase-based GPS/GLONASS positioning. Geomatics Research Australasia, 78, 19-36. (Download PDF)Dai L., C. Rizos & J. Wang (2001), The role of pseudo-satellite signals in precise GPS-based positioning. Journal of Geospatial Eng., HK Inst. of Engineering Surveyors, 3(1), 33-44.
Dai L., J. Wang, C. Rizos & S. Han (2001), Applications of pseudolites for deformation monitoring systems. 10th FIG Int. Symp. on Deformation Measurements, Orange, California, 19-22 March, 11-22. (Download PDF)
Dai L., J. Wang, C. Rizos & S. Han (2001), Real-time carrier phase ambiguity resolution for GPS/GLONASS reference station networks. Int. Symp. on Kinematic Systems in Geodesy, Geomatics & Navigation (KIS2001), Banff, Canada, 5-8 June, 475-481. (Download PDF)
Dai L., J. Wang, C. Rizos & S. Han (2001), Pseudo-satellite applications in deformation monitoring. GPS Solutions, 5(3), 80-87. (Download PDF)
Dai L., J. Wang, C. Rizos & S. Han (2003), Predicting atmospheric biases for real-time ambiguity resolution in GPS/GLONASS reference station networks. Journal of Geodesy, 76, 617-628. (Download PDF)
Dai L., J.Wang, T. Tsujii & C. Rizos (2002), Inverted pseudolite positioning and its applications. Survey Review, 36(286), 602-611. (Download PDF)
Dai L., J. Wang, T., Tsujii & C. Rizos (2001), Pseudolite applications in positioning and navigation: Modelling and geometric analysis. Int. Symp. on Kinematic Systems in Geodesy, Geomatics & Navigation (KIS2001), Banff, Canada, 5-8 June, 482-489. (Download PDF)
Dai L., J. Wang, T., Tsujii & C. Rizos (2001), Pseudolite-based inverted positioning and its applications. 5th Int. Symp. on Satellite Navigation Technology & Applications, Canberra, Australia, 24-27 July, paper 9, CD-ROM proceedings. (Download PDF)
Dai L., J. Zhang,, C. Rizos, S. Han & J. Wang (2000), GPS and pseudolite integration for deformation monitoring applications. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 1-8. (Download PDF)
Ge L., L. Dai, S. Han, C. Rizos & Y. Ishikawa (2000), GPS seismometers: The implementing issues. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 75-83. (Download PDF)
Han S., L. Dai, & C. Rizos (1999), A new data processing strategy for combined GPS/Glonass carrier phase-based positioning. 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Nashville, Tennessee, 14-17 September,1619-1627.
Liu J. & L. Dai (1999), A method to fix ambiguity for GPS long baseline precisely rapid static positioning. Journal of Wuhan Technical University of Surveying & Mapping, 24, Suppl. 5-8.
Tsujii T., C. Rizos, J. Wang, L. Dai, C. Roberts & M. Harigae (2001), A navigation/positioning service based on pseudolites installed on stratospheric airships. 5th Int. Symp. on Satellite Navigation Technology & Applications, Canberra, Australia, 24-27 July, paper 49, CD-ROM proceedings. (Download PDF)
Tsujii T., J. Wang, C. Rizos, L. Dai, M. Harigae, T. Inagaki, T. Fujiwara & T. Kato (2001), A technique for precise positioning of High Altitude Paltforms System (HAPS) using a GPS ground reference network. 14th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 11-14 September, 1017-1026.\
Tsujii T., C. Rizos, J. Wang, L. Dai & M. Harigae (2002), A navigation/positioning service based on pseudolites installed on stratospheric airships. Journal of the Japan Society for Aeronautical and Space Sciences, 50(576), 36-39, (in Japanese).
Wang J., C. Rizos, L. Dai, T. Tsujii & J. Barnes (2001), Integration of GPS and pseudo-satellites: New concepts for precise positioning. IAG Scientific Meeting, Budapest, Hungary, 3-8 September.
Wang, J., T. Tsujii, C. Rizos, L. Dai & M. Moore (2000), Integrating GPS and pseudolite signals for position and attitude determination: Theoretical analysis and experiment results. 13th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation, Salt Lake City, Utah, 19-22 September, 2252-2262. (Download PDF)
Wang J., T. Tsujii, C. Rizos, L. Dai & M. Moore (2001), GPS and pseudo-satellites integration for precise positioning. Geomatics Research Australasia, 74, 103-117. (Download PDF)
Presentations:
1. Dai L.(1999), A Multiple Outlier Detection Algorithm Based on Correlation Analysis for Carrier Phase-based GNSS Single Epoch Positioning, School of Geomatic Engineering, The University of New South Wales Sydney NSW 2052 Australia Annual Research Seminar, School of Geomatic Engineering,UNSW. 16-17 November 1999.
2. Dai L., (1999), A New Data Processing Strategy For Combined GPS/Glonass Carrier Phase-Based Positioning, GIS-GPS Showcase, Nanyang Technological University, Singapore, 19-20 November 1999.
3. Dai L., (1999), A Multiple Outlier Detection Algorithm for Instantaneous Ambiguity Resolution for Carrier Phase-based GNSS Positioning. Int. Symp. on Digital Earth (ISDE), Beijing, P.R. China, 29 November - 2 December.
4. Dai L., S. Han & C. Rizos (1999), Recent Results of GPS+GLONASS Testing at UNSW, SNAP-BHPE Seminar, 25 June 1999.
5. Dai L. (2000), GPS kinematic Positioning Applications With the Aid of Permanent GPS Network, Instataneous Ambiguity Resolution and Quality Control. School of Geomatic Engineering, The University of New South Wales Sydney, NSW 2052 Australia, SNAP Seminar, 21 February 2000.
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