Enhancing Precision of Global Positioning System using Short-Range Distance Baseline Field
Publication: Journal of Surveying Engineering
Volume 128, Issue 1
Abstract
This paper presents two novel concepts to improve the precision of global positioning system (GPS). First, observations of the low cutoff angle are applied to GPS positioning for obtaining more information to enhance precision. However, unequal weight is used, where z denotes the zenith distance, since the noise of the GPS observations is increased following the increase of the zenith distance. Second, a short-range baseline field is used as the test area. In addition, the external precision of the GPS baseline is evaluated using the distance obtained with a precise telemeter to replace the conventional method, which uses internal precision, i.e., baseline repeatability or standard deviation. The analysis results indicate that the best precision of GPS positioning is obtained at a cutoff angle of 15°. Moreover, using unequal weight to receive low cutoff angle GPS observation data to positioning can improve the precision average 3 mm for our test baselines.
Get full access to this article
View all available purchase options and get full access to this article.
References
Angus-Leppan, P. V., and Brunner, F. K.(1980). “Atmospheric temperature models for short range EDM.” Can. Surveyor, 34(2), 153–165.
Davis, J. L.et al. (1985). “Geodesy by radio interferometry: Effects of atmospheric modeling errors on estimates of baseline length.” Radio Sci., 20(6), 1593–1607.
Edlen, B.(1966). “The refractive index of air.” Metrologia, 2(2), 71–80.
Janes, H. W., Langley, R. B., and Newby, S. P.(1991). “Analysis of tropospheric delay prediction models: Comparisons with ray-tracing and implication for GPS relative positioning.” Bull. Geod., 65(1), 151–161.
MacMillan, D. S.(1995). “Atmospheric gradients from very long baseline interferometry observations.” Geophys. Res. Lett., 22(9), 1041–1044.
Neilan, R. E., Beutler, G., and Kouba, J. (1997). “The International GPS Service in 1997: 5 years of practical experience.” Oral Presentation, Scientific Assembly of IAG, Rio de Janeiro, Brazil.
Niell, A. E.(1996). “Global mapping function for the atmosphere delay at radio wavelengths.” J. Geophys. Res., 101(B2), 3227–3246.
Owens, J. C.(1967). “Optical refractive index of air: Dependence on pressure.” Temperature and composition, Appl. Opt., 6(1), 51–59.
Rothacher, M., et al. (1996). “The Bernese GPS Software Version 4.0.” Astronomical Institute, Univ. of Bern, Switzerland.
Rothacher, M., et al. (1997). “Processing strategies for regional GPS network.” Scientific Assembly of IAG, Rio de Janeiro, 3–9.
Information & Authors
Information
Published In
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Apr 19, 2000
Accepted: Jun 12, 2001
Published online: Feb 1, 2002
Published in print: Feb 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.