Analyzing the Impact of Integrating Pseudolite Observables into a GPS/INS System
Publication: Journal of Surveying Engineering
Volume 130, Issue 2
Abstract
This paper deals with the issue of incorporating pseudolite measurements into an integrated Global Positioning System/Inertial Navigation System (GPS/INS) positioning and attitude system with a view to improving signal availability, solution reliability, and accuracy in a localized area. Existing GPS/INS systems can overcome inherent shortcomings of each of the navigation technologies (line-of-sight signal requirement for GPS and INS errors that grow with time); therefore, such systems are now used for a wide variety of land, sea, and airborne applications where accurate positioning and/or attitude information is required with high output rate. However, their performance can still be degraded under certain conditions, such as when the duration of satellite signal blockage exceeds a certain time period (related to the quality of the INS), resulting in large accumulated INS errors. Such a scenario is a common occurrence for many kinematic applications. In an integrated GPS/Pseudolite/INS scheme, in order to gain the maximum benefit from additional pseudolite measurements, it is necessary to investigate how pseudolites can best be deployed to complement an existing GPS/INS system. A series of simulations, as well as field experiments with a GPS/Pseudolite/INS system comprising a NovAtel Millennium GPS receiver, an IntegriNautics IN200 pseudolite, and a MIGITS strapdown INS, were carried out, and the impact on performance of integrating pseudolite(s) has been assessed for a variety of operational conditions and different system configurations. The results indicate that the overall performance of the system can indeed be significantly improved using additional pseudolite measurements.
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References
Altmayer, C. (1999). “Pseudolites—A means to enhance the applicability of GNSS to municipal areas.” 55th ION Annual Meeting, Institute of Navigation, Fairfax, Va., 515–524.
Dai, L., Wang, J., Tsujii, T., and Rizos, C. (2001). “Pseudolite applications in positioning and navigation: Modelling and geometric analysis.” Int. Symp. on Kinematic Systems in Geodesy, Geomatics & Navigation (KIS2001), The Univ. of Calgary, Calgary, Canada, 482–489.
Dai, L., Wang, J., Rizos, C., and Han, S.(2002). “Pseudo-satellite applications in deformation monitoring.” GPS Solutions, 5(3), 80–87.
Ford, T., et al. (1996). “HAPPI—A High Accuracy Pseudolite/GPS Positioning Integration.” 9th Int. Tech. Meeting of the Satellite Div. of the U.S. Institute of Navigation, ISO, Fairfax, Va., 1719–1728.
Grejner-Brzezinska, D., Da, R., and Toth, C.(1998). “GPS error modeling and OTF ambiguity resolution for high-accuracy GPS/INS integrated system.” J. Geodesy, Berlin, 72(11), 626–638.
Grejner-Brzezinska, D. A., and Yi, Y.(2002). “Experimental GPS/INS/Pseudolite system for kinematic positioning.” Surv. Rev., 37(288), 113–126.
Grejner-Brzezinska, D., Yi, Y., and Wang, J. (2002). “Design and navigation performance analysis of an experimental GPS/INS/PL system.” 2nd Symp. on Geodesy for Geotechnical & Structural Applications, Vienna Univ. of Technology, Vienna, Austria, 314–325.
Harrington, R. L., and Dolloff, J. T. (1976). “The inverted range: GPS user test facility.” IEEE PLANS ’76, Piscataway, N.J., 204–211.
Hein, G. W., et al. (1997). “Practical investigations on DGPS for aircraft precision approaches augmented by pseudolites carrier phase tracking.” 10th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation GPS ION-97, ION, Fairfax, Va., 1851–1860.
Kee, C. D., et al. (2000). “Development of indoor navigation system using asynchronous pseudolites.” 13th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 1038–1045.
Lee, H. K. (2002). “GPS/pseudolite/SDINS integration approach for kinematic applications.” 15th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 1464–1473.
Lee, H. K., Wang, J., Rizos, C., Barnes, J., Tsujii, T., and Soon, B. K. H. (2002a). “Analysis of pseudolite augmentation for GPS airborne applications.” 15th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 2610–2618.
Lee, H. K., Wang, J., and Rizos, C. (2002b). “Kinematic positioning with an integrated GPS/pseudolite/INS.” 2nd Symp. on Geodesy for Geotechnical & Structural Applications, Vienna Univ. of Technology, Vienna, Austria, 314–325.
Leick, A. (1995). GPS satellite surveying, 2nd Ed., Wiley, 126–133.
Lemaster, E., and Rock, S. (1999). “Mars exploration using self-calibrating pseudolite arrays.” 12th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 71–78.
Lück, T., Löhnert, E., Eissfeller, B., and Meinke, P. (1997). “Track irregularity measurement using an INS-GPS integration technique.” 10th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 71–78.
Morley, T., and Lachapelle, G.(1997). “GPS augmentation with pseudolites for navigation in constricted waterways.” J. Inst. Nav., 44(3), 359–372.
Wang, J., Dai, L., Tsujii, T., Rizos, C., Grejner-Brzezinska, D., and Toth, C. (2001). “GPS/INS/Pseudolite integration: Concept, simulation and test.” 14th Int. Technical Meeting of the Satellite Div. of the U.S. Institute of Navigation, ION, Fairfax, Va., 2708–2715.
Wang, J.(2002). “Applications of pseudolites in geodetic positioning: Progress and problems.” J. Global Positioning Systems, 1(1), 48–56.
Wang, J., and Lee, H. K.(2002). “Impact of pseudolite location errors on positioning.” Geomatics Res. Austr., 77, 81–94.
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Copyright © 2004 American Society of Civil Engineers.
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Received: Nov 12, 2002
Accepted: Apr 26, 2003
Published online: Apr 15, 2004
Published in print: May 2004
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