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Integration of INS and Un-Differenced GPS Measurements for Precise Position and Attitude Determination

Published online by Cambridge University Press:  10 December 2007

Yufeng Zhang  and
Yang Gao
Yufeng Zhang*
Affiliation:
(The University of Calgary)
Yang Gao
Affiliation:
(The University of Calgary)
*
(Email: yzhang@geomatics.ucalgary.ca)
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Abstract

The integration of GPS and INS observations has been extensively investigated in recent years. Current systems are commonly based on the integration of INS data and the double differenced GPS measurements from two GPS receivers in which one is used as a reference receiver set up at a precisely surveyed control point and another is as the rover receiver whose position is to be determined. The requirement of a base receiver is to eliminate the significant GPS measurement errors related to GPS satellites, signal transmission and GPS receivers by double differencing measurements from the two receivers. With the advent of precise satellite orbit and clock products, the un-differenced GPS measurements from a single GPS receiver can be applied to output accurate position solutions at centimetre level using a positioning technology known as precise point positioning (PPP). This then opens an opportunity for the integration of un-differenced GPS measurements with INS for precise position and attitude determination. In this paper, a tightly coupled un-differenced GPS/INS system will be developed and described. The mathematical models for both INS and un-differenced GPS measurements will be introduced. The methods for mitigating GPS measurement errors will also be presented. A field test has been conducted and the results indicate that the integration of un-differenced GPS and INS observations can provide position and velocity solutions comparable with current double difference GPS/INS integration systems.

Type
Research Article
Information
The Journal of Navigation , Volume 61 , Issue 1 , January 2008 , pp. 87 - 97
Copyright
Copyright © The Royal Institute of Navigation 2007

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References

REFERENCES

Bevis, M., Businger, S., Herring, T. A., Rocken, C., Anthes, R. A. and Ware, R. H. (1992). GPS Meteorology: Remote Sensing of Atmospheric Water Vapor Using the Global Positioning System. Journal of Geophysical Research, Vol. 97, No. D14, pp. 15,787–15,801, October, 1992.CrossRefGoogle Scholar
Caissy, M., Heroux, P., Lahaye, F., MacLeod, K. and Popelar, J. (1996). Real-Time GPS Correction Service of the Canadian Active Control System. Proceedings of ION GPS-96, Kansas City, Missouri, September 17–20, 1996.Google Scholar
Gao, Y. and Shen, X. (2002). A New Method for Carrier-Phase-Based Precise Point Positioning. Navigation, Journal of The Institute of Navigation, 49(2): 109–116.CrossRefGoogle Scholar
Gao, Y., Chen, K. (2005). Performance Analysis of Precise Point Positioning Using Rea-Time Orbit and Clock Products. Journal of Global Positioning Systems, Vol. 3, No. 1–2. pp. 95–100.CrossRefGoogle Scholar
Gelb, A. (1974). Applied Optimal Estimation. The MIT Press.Google Scholar
Kouba, J. and Heroux, P. (2000). Precise Point Positioning Using IGS Orbit Products. GPS Solutions, Vol. 5, No. 2, pp 12–28, 2000.CrossRefGoogle Scholar
Navcom, http://www.navcomtech.com/starfire.cfmGoogle Scholar
Petovello, M., Cannon, ME. and Lachapelle, G. (2004). Benefits of Using a Tactical-Grade IMU for High-Accuracy Positioning. Navigation, Journal of The Institute of Navigation, 51(1): 1–12.CrossRefGoogle Scholar
Scherzinger, B. (2000). Precise Robust Positioning with Inertial/GPS RTK, Proceedings of ION-GPS-2000, Salt Lake City, UH, September 20–23. 2000.Google Scholar
Scherzinger, B. (2004). Estimation with Application to Navigation. Lecture Notes ENGO 699.11 Dept. of Geomatics Eng., The University of Calgary, Calgary, Canada.Google Scholar
Schwarz, K.-P. and Wei, M. (2000). INS/GPS Integration for Geodetic Applications. Lecture Notes ENGO 623. Dept. of Geomatics Eng., The University of Calgary, Calgary, Canada.Google Scholar
Zhang, Y. and Gao, Y. (2004). Design and Analysis of a Tightly Coupled Kalman Filter for a Point GPS/INS System: Preliminary Results. Proceedings of 2004 International Symposium on GPS/GNSS, Sydney, Australia, November 6–8. 2004.Google Scholar
Zhang, Y. and Gao, Y. (2005). Performance Analysis of a Tightly Coupled Kalman Filter for the Integration of Un-differenced GPS and Inertial Data. Proceedings of ION NTM 2005, San Diego, CA, USA, January 24–26. 2005.Google Scholar
Schuler, T. (2001). On Ground-Based GPS Tropospheric Delay Estimation. Dissertation, Universität der Bundeswehr München, Fakultät für Bauingenieur- und Vermessungswesen, 2001.Google Scholar