NDLI: Errors sources elimination for accurate evaluation of displacement using global positioning system

Content Provider	IEEE Xplore Digital Library
Author	Kheloufi, N. Lounis, M.
Copyright Year	2012
Description	Author affiliation: Laboratoire LAAR Université des Sciences et des, Technologies Mohamed Boudiaf (USTOMB), Algeria (Lounis, M.) \|\| Laboratoire de Géodésie spatiale, Centre des Techniques spatiales (CTS), BP 01, Rue de Palestine 31200 Arzew, Algeria (Kheloufi, N.)
Abstract	To avoid errors and increase the quality of displacement assessment, we should know that positioning system depend on several different errors modeling the computation procedures. The principal physical parameters (orbit, solar wind, etc) of the satellite constellation, the measures at receiver's level, as well as the software used in network adjustment are the main sources of errors, susceptible to blemish the three dimensions (X, Y, Z) components of baselines especially the vertical component because the lack of information on Geoid undulation in the area of study[2]. We can list some of these sources, in order to have an accurate idea which allows us to avoid them and thus elaborate GPS observation strategy where expected accuracies could be reached. Among them, the most important are, the signal propagation due to ionosphere and troposphere crossed, orbit error, multipath, receiver antenna phase center variation and satellites GDOP (Geometry Dilution of Position). Certain corrections (ionosphere, mono frequencies receiver case) are transmitted as the parameters by the ephemeris in the navigation message. By citing these errors, we do not omit the strategy of treatment itself which consist to use the best combination of carrier wave received by the satellite such as refining coarse acquisition, or using best combinations which are, L1&L2, L1, L1+L2, and many others[8]. Although taking in consideration these precautions, several errors remain no detectable and request more attention in the time of pretreatment by the different software intended to the network adjustment. In this paper, we have intended to avoid as possible all thee sources of errors and thus we could reach sub centimeter accuracies over the points coordinates observed by receivers which mean the best estimation of planimetric and three dimension distances computed by the estimated coordinates.
Starting Page	220
Ending Page	225
File Size	177444
Page Count	6
File Format	PDF
ISBN	9781467316576
e-ISBN	9781467316583
DOI	10.1109/SETIT.2012.6481918
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-21
Publisher Place	Tunisia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antenna measurements Satellites Coarse acquisition Undulation Phase center Satellite broadcasting Terrestrial atmosphere Receivers Orbits Global Positioning System GDOP
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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