Summary
Accuracies of a centimeter or better in earth baseline measurements are crucial for many investigations in crustal dynamics. This implies measurement accuracies of the order of a few parts in 108 of baseline length for regional geodesy. In recent years, techniques exploiting the Global Positioning System (GPS) have advanced rapidly toward this accuracy goal. The latest GPS techniques developed at JPL have resulted in centimeter-level agreement with independent measurements made by very long baseline interferometry (VLBI) for baselines up to 2000 km in length. Techniques that have shown promise for GPS-based geodesy include: (1) carrier phase ambiguity resolution, (2) multi-day GPS orbit determination, (3) stochastic estimation of the zenith tropospheric delay, and (4) simultaneous use of carrier phase and pseudorange. The order of importance depends upon the scale of the network, and the approaches are often synergistic. For example, ambiguity resolution can depend upon the ability of the other techniques to improve precision. These results have been acheived despite a partial GPS constellation, regional tracking only, and pseudorange data plagued by multipath. A full GPS constellation and a permanent global tracking network will be in place in the early 1990’s, and a new receiver/antenna prototype at JPL is now producing smoothed pseudorange observables accurate to better than 5 cm.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Bertiger, W.I. and S.M. Lichten (1987): Demonstration of 5 to 20 parts per billion repeatability for a continental baseline estimated with multi-day GPS orbits, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1238
Bierman, G.J. (1977): Factorization Methods for Discrete Sequential Estimation, Academic Press, Orlando, Florida
Blewitt, G. et al. (1987): Improved GPS network solutions using bias-optimizing techniques, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1236
Blewitt, G. (1988): Successful GPS carrier phase ambiguity resolution for baselines up to 2000 km in length, EOS Trans. Am. Geo. U., Vol. 69, No. 16, p. 325
Dong, D. and Y. Bock (1988): GPS network analysis: Ambiguity resolution, EOS Trans. Am. Geo. U., Vol. 69, No. 16, p. 325
Counselman III, C.C. (1987): Resolving carrier phase ambiguity in GPS orbit determination EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1238
Tralli D.M. and T.H. Dixon (1988): A few parts in 108 geodetic baseline repeatability in the Gulf of California using the Global Positioning System, Geophysical Research Letters, Vol. 15, pp. 353–356
Elgered G. et al. (1987): On the Weather Dependence of Baseline-Lengths Estimated by Very-Long-Baseline Interferometry, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1239
Freymueller J.T. and MP. Golombek (1987): Effect of Fiducial Network Geometry on GPS Baseline Accuracy in South America, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1237
Lichten, S.M. and J.S. Border (1987): Strategies for high-precision global positioning system orbit determination, Journal of Geophysical Research, Vol. 92, No. B12, pp. 12751–12762
Meehan T.K. et al. (1987a): ROGUE: A new high accuracy, digital GPS receiver, Proceedings of the IUGG Conference, Vancouver, August 1987
Meehan T.K. etal. (1987b): GPS multipath reduction using absorbing backplanes, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1238
Melbourne, W.M. (1985): The case for ranging in GPS based systems, Proceedings of the First Symposium on Precise Positioning with the Global Positioning System, Positioning with GPS—1985, Ed. C.C. Goad, Rockville, Maryland, pub. U.S. Department of Commerce, NOAA
Skrumeda, L.S. et al. (1987): Baseline results from the June 1986 Southern California and Caribbean GPS Experiments, EOS Trans. Am. Geo. U., Vol. 68, No. 44, p. 1236
Thornton, C.L., and G.J.Bierman (1980): UDUT covariance factorization for Kaiman filtering, Control and Dynamic Systems, Advances in Theory and Application, Ed. C.T. Leondes, Academic Press, Vol. 16, pp. 177–248
Tralli, D.M. et al. (1988), The effect of wet tropospheric path delays on estimation of geodetic baselines in the Gulf of California using the Global Positioning System, accepted for publication in Journal of Geophysical Research
Wubbena, G. (1985): Software developments for geodetic positioning with GPS using TI-4100 code and carrier measurements, Proceedings of the First Symposium on Precise Positioning with the Global Positioning System, Positioning with GPS—1985, Ed. C.C. Goad, Rockville, Maryland, pub. U.S. Department of Commerce, NOAA
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Blewitt, G., Yunck, T.P., Lichten, S.M., Bertiger, W.I., Wu, S.C. (1989). GPS Geodesy: A Status Report. In: Linkwitz, K., Hangleiter, U. (eds) High Precision Navigation. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74585-0_4
Download citation
DOI: https://doi.org/10.1007/978-3-642-74585-0_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-74587-4
Online ISBN: 978-3-642-74585-0
eBook Packages: Springer Book Archive