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Simulating the Differential Positioning Mode Using One GPS Receiver
Journal of Civil, Construction and Environmental Engineering
Volume 2, Issue 2, April 2017, Pages: 78-86
Received: Mar. 10, 2017; Accepted: Mar. 21, 2017; Published: Apr. 14, 2017
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Ahmed Abobakr Elashiry, Faculty of Engineering, Beni-Suef University, Beni-Suef, Egypt
Abdel Hameid M. Abdel Hameid, Faculty of Engineering, Beni-Suef University, Beni-Suef, Egypt
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This research tends to raise the accuracy of absolute point positioning by simulating the differential positioning mode. This process was done by observing the unknown point using one unit GPS receiver after observing the fixed point with the same receiver and estimate the Doppler value; where it equals to the expected change at carrier phase measurement from two adjacent epochs, to determine the phase value in the following epoch and generate new observation file for the known point has phase observation at the same period of observing the unknown point. The generated data at the known point will be solved with the observed phase data at the unknown point for four satellites at least using triple difference technique to vanish the ambiguity value and all affecting errors on observations. Finally the least square technique will be applying on the resulted equations from the previous process. This method had been enhanced to improve the positioning accuracy from ten meters to 30 cm as a maximum error in 3D coordinates. In condition that there is one fixed point at least in the observation area, and the interval period between observing the fixed and unknown point is less than 15 min.
GPS, Absolute Point Positioning, Phase Measurements, Doppler Estimations
To cite this article
Ahmed Abobakr Elashiry, Abdel Hameid M. Abdel Hameid, Simulating the Differential Positioning Mode Using One GPS Receiver, Journal of Civil, Construction and Environmental Engineering. Vol. 2, No. 2, 2017, pp. 78-86. doi: 10.11648/j.jccee.20170202.15
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This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
EL-Rabbany, A., "Introduction to GPS (The Global Positioning System)", Artech House, 2002.
Petrovskyy, V., et. al., "Precise GPS Position and Attitude", GPS Technology Projects, Aalborg University, 2007.
El-Rabbany," Precise GPS Point Positioning: the Future Alternative to Differential GPS Surveying", Ryerson University, 2002.
Sunehra, D., "Estimation of Prominent Global Positioning System Measurement Errors for GAGAN Applications", European Scientific Journal, Vol. 9, pp 68-81, 2003.
Akim, E. L.,"GPS Errors Statistical Analysis For Ground Receiver Measurements", Keldysh, Inst. Apl. Mathem., Russia Academy of Sciences, 2003.
Alkan, R. M., et. al., "GPS Standard Positioning Service Performance After Selective Availability Turned Off‏", International Symposium In GIS, the International Federation of Surveyors (FIG), 2002.
Chen, H. W., et al., “A New Coarse-Time GPS Positioning Algorithm Using Combined Doppler and Code-Phase Measurements”, GPS Solution, Vol. 8, DOI 10.1007/s10291-013-0350-8, 2013.
Chen, K., "Real-Time Precise Point Positioning Using Single Frequency Data" Proceedings of the Institute Of Navigation ION GNSS, 2005.
CHANG, X. W. et. al., “An Algorithm for Combined Code and Carrier Phase Based GPS Positioning”, BIT Numerical Mathematics Vol. 43, pp 915 - 927, 2003
Zeng, F., et. al., ”Single-Point Positioning with the Pseudorange of Single-frequency GPS Considering the Stochastic Model”, Pacific Science Review, Vol. 10, No. 3, pp. 274-278, 2008.
Elashiry, A. A., et. al., “Adjusting of Absolute Point Positioning Accuracy”, 7th International Conference On Emerging Technologies in Civil Engineering, Architecture and Environmental Engineering for Global Sustainability, New Delhi, Indian, Journal of Basic and Applied Engineering Research, Volume 2, Number 8; April-June, 2015.
Elashiry, A. A., et. al., ”Enhancement Of The Single Point Positioning Accuracy (Using The Observations Of IGS Service)”, International Journal of Civil, Structural, Environmental and Infrastructure Engineering Research and Development journal, Vol. 5, Issue 3, Jun 2015.
Silva, P., "Cycle Slip Detection and Correction for Precise Point Positioning", Proceedings of the Institute Of Navigation ION GNSS, 2013.
Elashiry, A. A., et. al., “Modification Of Phase-Phase And Phase-Code Methods For Precise Detection And Prediction Of GPS Cycle Slip Error”, International Journal of Unmanned Systems Engineering (IJUSEng),, Vol. 3, Issue 4, 2015
Guochang X., "GPS Theory Algorithms and Applications". (2nd ed.). Springer-Verlag. Berlin. Heidelberg, 2007.
Grewal, M. S., "Global Positioning System, Inertial Navigation, and Integration", 2nd Edition, A John Wiley & Sons, Inc, 2007.
ICD, "Navstar GPS Space Segment/ Navigation User Interfaces", Arinc Research Corporation, ICD-GPS-200C, 1993.
Gustavsson, P., "Development of a Matlab Based GPS Constellation Simulation for Navigation Algorithm Developments", Master's Thesis, Space Science Department, Lulea University of Technology, 2005.
Ren, Z., et. al., "Instantaneous Cycle-Slip Detection and Repair of GPS Data Based on Doppler Measurement", International Journal of Information and Electronics Engineering, Vol. 2, No. 2, 2012.
Blewitt, G., “Basics of the GPS Technique: Observation Equations”, Swedish Land Survey, 1997.
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