Impact of Crowded Sky on GNSS Positioning

Authors

  • Shamal Ahmed Department of Surveying and Geomatics, Faculty of Engineering, Tishk International University-Erbil, Kurdistan Region, Iraq

DOI:

https://doi.org/10.25156/ptj.v13i1.1048

Keywords:

GNSS, occupation time, PDOP, static method, accuracy

Abstract

Presently, there is a huge number of Global Navigation Satellite System (GNSS) satellites in orbit, and it is possible for users to have a clear view with a high number of satellites at a single epoch. This large number of satellites results in a significant improvement in satellite geometry, visibility, Dilution of Precision (DOP), and simultaneously, reduction of occupation time and sufficient time to fix the integer ambiguity. The static method is the most accurate method to establish geodetic networks using satellites, but the length of time required for the survey and the post-processing of the data may restrict its applicability. This paper investigated the impact of increasing number of satellites, regardless the type of the system, on occupation time and evaluating accuracy in static method with a 13 km baseline length. The observations were assessed and compared to the accuracy obtained from different satellite numbers in different periods. The results indicate that by increasing satellite’s number from 4 to 20, the occupation time reduces by 83% from 30 min. to 5 min., and position dilution of precision (PDOP) reduces from 5.30 to 1.4.

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References

Andritsanos, V.D., Arabatzi, O., Gianniou, M., Pagounis, V., Tziavos, I.N., Vergos, G.S. and Zacharis, E. (2016), “Comparison of Various GPS Processing Solutions toward an Efficient Validation of the Hellenic Vertical Network: The ELEVATION Project”, Journal of Surveying Engineering, Vol. 142 No. 1, doi: 10.1061/(asce)su.1943-5428.0000164.

Army Corps of Engineer. (2011), NAVSTAR Global Positioning System Surveying, Army Corps of Engineer, Washington.

Ashour, I., el Tokhey, M., Mogahed, Y. and Ragheb, A. (2022), “Performance of global navigation satellite systems (GNSS) in absence of GPS observations”, Ain Shams Engineering Journal, Vol. 13 No. 2, doi: 10.1016/j.asej.2021.09.016.

Blanco-Delgado, N. and Nunes, F.D. (2009), “A convex geometry approach to dynamic GNSS satellite selection for a multi-constellation system”, Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), pp. 1351–1360.

El-Rabbany, A. (2002), Introduction to GPS: The Global Positioning System, Artech house.

Enge, P., Parkinson, B., Spilker Jr., J. and Axelrad, P. (1996), Global Positioning System: Theory and Applications, 2-Volume Set, Global Positioning System: Theory and Applications, 2-Volume Set, doi: 10.2514/4.472497.

Ferrão, P. (2013), “Positioning with Combined GPS and GLONASS Observations”, MSc Diss., Técnico Lisboa.

Gethin Wyn Roberts, C.M.H. and X.T. (2019), “Survey accuracy: The future of precision with 5 GNSS constellations : GPS World”, GPS World.

Ghilani, C. and Wolf, P. (2012), “Elementary Surveying: An Introduction to Geomatics, 2012”, ISBN-13, pp. 367–372.

Hofmann-Wellenhof, B., Lichtenegger, H. and Collins, J. (2001), Global Positioning System : Theory and Practice / B. Hofmann-Wellenhof, H. Lichtenegger, J. Collins., GPS.

Leick, A., Rapoport, L. and Tatarnikov, D. (2015), GPS Satellite Surveying: Fourth Edition, GPS Satellite Surveying: Fourth Edition, doi: 10.1002/9781119018612.

Mader, G.L. (1992), “Rapid static and kinematic Global Positioning System solutions using the ambiguity function technique”, Journal of Geophysical Research, Vol. 97 No. B3, doi: 10.1029/91JB02845.

Mageed, K.M.A. (2015), “Comparison of GPS commercial software packages to processing static baselines up to 30 km”, ARPN Journal of Engineering and Applied Sciences, Vol. 10 No. 22.

Ocalan, T., Erdogan, B., Tunalioglu, N. and Durdag, U.M. (2016), “Accuracy Investigation of PPP Method Versus Relative Positioning Using Different Satellite Ephemerides Products Near/Under Forest Environment”, Earth Sciences Research Journal, Vol. 20 No. 4, doi: 10.15446/esrj.v20n4.59496.

Poluzzi, L., Tavasci, L., Vecchi, E. and Gandolfi, S. (2021), “Impact of Multiconstellation on Relative Static GNSS Positioning”, Journal of Surveying Engineering, Vol. 147 No. 2, doi: 10.1061/(asce)su.1943-5428.0000351.

Qu, L., Zhao, Q., Li, M., Guo, J., Su, X. and Liu, J. (2013), “Precise point positioning using combined Beidou and GPS observations”, Lecture Notes in Electrical Engineering, Vol. 245 LNEE, doi: 10.1007/978-3-642-37407-4_22.

Schofield, W. and Breach, M. (2007), Engineering Surveying, CRC Press.

Seeber, G. (2008), Satellite Geodesy, Satellite Geodesy, doi: 10.1515/9783110200089.

Steer, W. (2021), “Precision of Static GNSS using Multi-Constellation Data as a Function of Session Length”.

Teunissen, P.J.G. and Montenbruck, O. (2017), Springer Handbook of Global Navigation Satellite Systems, Springer Handbook of Global Navigation Satellite Systems, first., Springer International Publishing, New York, doi: 10.1007/978-3-319-42928-1.

Uren, J. and Price, B. (2018), Surveying for Engineers, Bloomsbury Publishing.

Xu, G. and Xu, Y. (2016), GPS: Theory, Algorithms and Applications, Third Edition, GPS: Theory, Algorithms and Applications, Third Edition, doi: 10.1007/978-3-662-50367-6.

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Published

2023-09-20

How to Cite

Ahmed, S. (2023). Impact of Crowded Sky on GNSS Positioning . Polytechnic Journal, 13(1), 157-162. https://doi.org/10.25156/ptj.v13i1.1048

Issue

Vol. 13 No. 1 (2023)

Section

Research Articles

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Copyright (c) 2023 Shamal Ahmed

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