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Дисертації з теми "Global Positioning System"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 9 червня 2025

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1

Початко, Тетяна Володимирівна, Татьяна Владимировна Початко, Tetiana Volodymyrivna Pochatko, and A. Gusakov. "Global positioning system." Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/17134.

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2

Streletskiy, Y. S. "Global positioning system." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40496.

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Space exploration has a great meaning for mankind. There are many space technologies that have been explored for space, but then transformed for human everyday use. One of such technologies is GPS navigation.

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3

Postolny, B., and L. M. Chuchilina. "The global positioning system." Thesis, Вид-во СумДУ, 2009. http://essuir.sumdu.edu.ua/handle/123456789/16778.

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4

Alves, Jr Daniel F. "GLOBAL POSITIONING SYSTEM TELECOMMAND LINK." International Foundation for Telemetering, 1991. http://hdl.handle.net/10150/613167.

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International Telemetering Conference Proceedings / November 04-07, 1991 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The Global Positioning System of satellites and pseudosatellite ground stations (GPS) is designed to provide very accurate Time, Space, and Position Information throughout the entire world. It is also being used to provide such information to unmanned vehicles operating on test ranges throughout the United States, as a replacement/ adjunct for tracking radar as well as a form of guidance. What is proposed in this paper, for which a patent has been applied, is that the existing L-Band RF link carry command information, when required, as well as TSPI information.

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5

Mitrovic, Predrag Stanimir. "Global Positioning System based runway instrumentation system." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1173987759.

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6

Frei, Erwin. "Rapid differential positioning with the global positioning system (GPS) /." [S.l.] : [s.n.], 1991. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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7

Clark, Benjamin J. Bevly David M. "GPS/INS operation in shadowed environments." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Mechanical_Engineering/Thesis/Clark_Benjamin_45.pdf.

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8

Fink, AnnMarie Bizek. "Investigation of the selective availability in NAVSTAR Global Positioning System." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1176922016.

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9

Nguyen, Tam Xuan. "Differential global positioning system for precision landings." Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1183653211.

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10

Perepetchai, Valeri. "Global positioning system receiver autonomous integrity monitoring." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29400.

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This thesis is concerned with a theoretical development of Receiver Autonomous Integrity Monitoring (RAIM) algorithms. Integrity characterizes a navigation system ability to provide timely warning to users when the Global Positioning System (GPS) should not be used for navigation. RAIM algorithms detect, identify GPS anomalies and satellite failures and provide the Horizontal Protection Level (HPL). HPL means the smallest detectable horizontal position error with given probabilities of a false alert and missed detection. The developed algorithms use carrier phase measurements, which compared with code measurements can provide precise positioning and an extremely high level of GPS integrity due to setting a very tight fault detection threshold and HPL. First the linear model based on accumulating a few epochs of single difference carrier phase measurements is presented. Then the estimated integer ambiguities available from the positioning solution are used to develop the other single difference linear model. The typical fault detection and identification methods, used for code measurements, are applied to these linear models, leading to various single difference algorithms. The double difference method is also derived. The maximum position separation technique is used to derive the position space based method, implemented through a set of Kalman filters. Finally, computer simulations are performed to compare the developed various algorithms.

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11

Burwell, Alan C. "Global Positioning System disaster notification messaging service." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/37592.

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Approved for public release; distribution is unlimited<br>The United States has offered free worldwide position, navigation, and timing (PNT) broadcast data through the Global Positioning System (GPS) since its 1993 initial operations capable declaration, and periodic modernization efforts have been made throughout its 20-year history. A planned modernized L5 safety of life GPS signal, combined with the current GPS-enabled device ubiquity, offers an unprecedented opportunity to embed and broadcast other non-PNT information into GPS signals and reach individuals on a global scale with information in new ways. Adequate additional bandwidth exists in the new L5 safety of life signal to embed notification information for worldwide natural and technological disasters and add a new communication medium for a possible global disaster notification system. This thesis explores the background, requirements, system design and U.S. policy of a disaster-notification enabled GPS L5 safety of life signal.

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12

Cohenour, John C. "Global Positioning System Clock and Orbit Statistics and Precise Point Positioning." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1249043829.

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13

Shaltot, Mohamed Mahrous. "Parametric availability studies for the global positioning system." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1175882765.

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14

Westrop, Jane M. "Dynamic positioning by GPS." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278351.

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15

Shetty, Ranjeet S. "A Real-Time Bi-Directional Differential Global Positioning System." Ohio University / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175006976.

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16

Heroux, Pierre. "Publications related to the Global Positioning System Active Control Systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30048.pdf.

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17

Choi, Sang-Sung. "Fault detection algorithm for Global Positioning System receivers." Ohio : Ohio University, 1991. http://www.ohiolink.edu/etd/view.cgi?ohiou1183661191.

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18

Knight, Mark Frederick. "Ionospheric scintillation effects on global positioning system receivers." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phk698.pdf.

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19

Harris, William M. "Integrated Global Positioning System and inertial navigation system integrity monitor performance." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1175091451.

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20

Komjathy, Attila. "Global ionospheric total electron content mapping using the global positioning system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq29468.pdf.

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21

Komjathy, A. "Global ionospheric total electron content mapping using the global positioning system." Thesis, University of New Brunswick, 1997. http://hdl.handle.net/1882/925.

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22

Duchateau, Laurent M. "Treatment of global positioning system signals by software." Doctoral thesis, Universite Libre de Bruxelles, 2002. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211344.

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23

Fuente, C. de la. "High accuracy coordinate determination using Global Positioning System." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384790.

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24

HANCOCK, THOMAS P. "NAVSTAR-GLOBAL POSITIONING SYSTEM (GPS) FOR RANGE APPLICATIONS." International Foundation for Telemetering, 1985. http://hdl.handle.net/10150/615730.

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International Telemetering Conference Proceedings / October 28-31, 1985 / Riviera Hotel, Las Vegas, Nevada<br>The purpose of this paper is to describe the Tri-Service effort to use the NAVSTAR Global Positioning System (GPS) on Tri-Service ranges. It will describe the background, the development program, the equipment, the management team, the specifications that the equipment must satisfy, the integration into five DOD ranges, an assessment of developmental risk, a recap of logistical aspects, and will provide a development schedule.

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25

Rastogi, Ashita. "ANALYSIS OF ANOMALOUS GLOBAL POSITIONING SYSTEM RECEIVER DATA." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1171647235.

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26

Osmanbhoy, Azhar Haroon Rashid. "High dynamic simulations for global positioning system receivers." Ohio University / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1172605371.

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27

Seitz, Andrew C. "A high fidelity global positioning system receiver simulation." Ohio University / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1172865665.

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28

Feng, Gang. "Block processing techniques for the global positioning system." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1178047161.

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29

Dhup, Aakriti. "Vehicle tracking using the Global Positioning System and the global system for mobile technology." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1604874.

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<p> The current project presents the development of a system that is used to detect the exact location of a vehicle, through an embedded Global Positioning System (GPS) module. The system will provide the global vehicle coordinates to the vehicle's owner by sending a Short Message Service (SMS) text to the owner's cell phone, through a Global Service for Mobile (GSM) modem. Moreover, the system allows the vehicle's owner to send a command via cell phone that will disable the vehicle's engine in case of theft. </p><p> The hardware implementation of the system includes, in addition to the Global Positioning System and the Global Service for Mobile modules, an embedded microcontroller which has been programmed to perform the integrated system operations. There is a user friendly device called Liquid Crystal Display which is also used in order to have a look at the output.</p>

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30

Lavallee, D. A. "Tectonic plate motions from global GPS measurements." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324800.

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31

MacDonald, Vincent J. "A systems engineering approach to the design of a vehicle navigation system." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-04272010-020120/.

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32

Zhu, Zhen. "Averaging correlation for weak Global Positioning System signal processing." Ohio : Ohio University, 2002. http://www.ohiolink.edu/etd/view.cgi?ohiou1175015135.

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33

Materna, Kathryn. "Analysis of atmospheric delays and asymmetric positioning errors in the global positioning system." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90657.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2014.<br>15<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 50-51).<br>Abstract Errors in modeling atmospheric delays are one of the limiting factors in the accuracy of GPS position determination. In regions with uneven topography, atmospheric delay phenomena can be especially complicated. Current delay models used in analyzing GPS data from the Plate Boundary Observatory (PBO) are successful in achieving millimeter-level accuracy at most locations; however, at a subset of stations, the time series for position estimates contain an unusually large number of outliers. In many cases these outliers are oriented in the same direction. The stations which exhibit asymmetric outliers occur in various places across the PBO network, but they are especially numerous in California's Mammoth Lakes region, which served as a case study for this project. The phenomenon of skewed residuals was analyzed by removing secular trends and variations with periods longer than 75 days from the signal using a median filter. The skewness of the station position residuals was subsequently calculated in the north, east and up directions. In the cases examined, typical position outliers are 5-15 mm. In extreme cases, skewed position residuals, not related to snow on antennas, can be as large as 20 mm. I examined the causes of the skewness through site-by-site comparisons with topographic data and various forms of weather data such as numerical weather models, radiosondes, and satellite images. Analysis suggests that the direction of the skewness is generally parallel to the local topographic gradient at a scale of several kilometers. Comparison with weather data suggests that outlier data points in the Mammoth Lakes region occur when lee waves are likely to form downstream of the Sierra Nevada Mountains. The results imply that coupling between the atmosphere and local topography, e.g. lee waves, is responsible for the phenomenon of skewed residuals.<br>by Kathryn Materna.<br>S.B.

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34

A, Kuzmenko. "CORRELATION-EXTREME NAVIGATION SYSTEM BASED ON MORPHOLOGICAL ANALYSIS." Thesis, ПОЛІТ.Сучасні проблеми науки.Гуманітарні науки:тези доповідей XVII Міжнародної науково-практичної конференції молодих учених і студентів:[y 2-x т.].Т.2(м.Київ,4-7 квітня 2017 р.)/[ред.кол.:В.М.Ісаєнко та ін.]; Національний авіаційний університет.-К.:НАУ,2017.-374 с, 2017. http://er.nau.edu.ua/handle/NAU/27745.

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Therefore, advantage of morphological method is associated with the possibility of improving the integration of image registration conditions. Introduced by morphological analysis the notion of «form» significantly enriches the radiometric properties of reference image, making possible to build a more robust detection algorithms.

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35

Drewett, Adrian A. "GPS : aspects of pseudo-range positioning offshore." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254019.

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36

Cheng, Chao-heh. "Calculations for positioning with the Global Navigation Satellite System." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176839268.

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37

Cacchi, Alberto. "Valutazione dell'attività fisica tramite l'uso del Global Positioning System." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Questo elaborato è stato strutturato in 3 diversi capitoli, nel capitolo 1 sono presentate informazioni generali su: che cosa sia un sistema GPS, come funzioni, i suoi principali errori e alcune implementazioni. Il capitolo 2 riguarda i sistemi GPS indoor di nuova tecnologia e le loro applicazioni. Mentre il capitolo 3 racchiude una analisi di alcuni studi, che riguarda l'utilità della raccolta dati, tramite sistemi GPS nell'ambito sportivo. In particolare nella prima parte si studia la validità e l'affidabilità delle misure GPS considerando l'evoluzione delle unità GPS stesse con l'aumento di frequenza di campionamento. Una volta verificati questi parametri, sono stati presi in considerazione nella seconda parte la raccolta di alcuni studi, riguardanti il monitoraggio dell'attività fisica di individui comuni in relazione all'ambiente in cui si trovano. Verificandone la qualità dei dati tramite lo studio della quantità dei dati persi. Infine nell'ultima parte viene focalizzata la ricerca sulle diverse variabili misurabili con il GPS: distanza totale, distanza relativa, velocità e carico sul corpo degli atleti, e come esse cambiano in relazione ai ruoli, alla competitività e all'età. Quest'ultima analisi è sviluppata nel contesto di vari sport di squadra.

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38

Tahir, Muhammad Faisal. "Global Positioning System (GPS) Based Location Finder on Android." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-751.

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This thesis presents the development of an android application which has the capability of using the concepts of augmented reality to submerge the virtual information of user’s surroundings by detecting and tracking user’s location in real time.Eclipse is an open source software, used in professional development of software solutions and programming applications. It provides extensive availability of free libraries. It has been employed for the development of software used in this thesis.As the android GPS is notified, the application is fully location aware which keeps the track of user’s location. When the user points the camera in a specific direction, the application tracks the camera orientation and displays the records of a specific place. Then the application keeps on updating the information as the direction changes. The additional information is displayed with the help of "Google" databases. The information when gathered is then displayed to the live feed of camera which helps the users to interact in a more reliable way. Option for viewing the places in map view with the help of Google Maps is also available. Keywords: Java, Android, Database management system,Desktop applications, Google databases, Maps

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39

Mama, Mounchili. "Mathematical Modelling of The Global Positioning System Tracking Signals." Thesis, Blekinge Tekniska Högskola, Avdelningen för matematik och naturvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4313.

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Recently, there has been increasing interest within the potential user community of Global Positioning System (GPS) for high precision navigation problems such as aircraft non precision approach, river and harbor navigation, real-time or kinematic surveying. In view of more and more GPS applications, the reliability of GPS is at this issue. The Global Positioning System (GPS) is a space-based radio navigation system that provides consistent positioning, navigation, and timing services to civilian users on a continuous worldwide basis. The GPS system receiver provides exact location and time information for an unlimited number of users in all weather, day and night, anywhere in the world. The work in this thesis will mainly focuss on how to model a Mathematical expression for tracking GPS Signal using Phase Locked Loop filter receiver. Mathematical formulation of the filter are of two types: the first order and the second order loops are tested successively in order to find out a compromised on which one best provide a zero steady state error that will likely minimize noise bandwidth to tracks frequency modulated signal and returns the phase comparator characteristic to the null point. Then the Z-transform is used to build a phase-locked loop in software for digitized data. Finally, a Numerical Methods approach is developed using either MATLAB or Mathematica containing the package for Gaussian elimination to provide the exact location or the tracking of a GPS in the space for a given a coarse/acquisition (C/A) code.

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40

Moses, Jack. "NAVSTAR Global Positioning System Applications for Worldwide Ionospheric Monitoring." International Foundation for Telemetering, 1992. http://hdl.handle.net/10150/611941.

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International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California<br>The ionosphere is a critical link in the earth's environment for space-based navigation, communications and surveillance systems. Signals sent down by the GPS satellites can provide an excellent means of studying the complex physical and chemical processes that take place there. GPS uses two frequencies to ascertain signal delays passing through the ionosphere. These are measured as errors and used to correct position solutions. Since this process is a means of measuring columns of Total Electron Content (TEC), multiple top-soundings from the GPS constellation could provide significant detail of the ionospheric pattern and possibly lead to enhancement of predictions for selectable areas and sites. This paper addresses transforming the GPS propagation delays (errors) into TEC and providing TEC contours on a PC-style workstation in real and integrated time and discusses a worldwide ionospheric network monitoring system.

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41

Marti, Lukas. "Global Positioning System Interference and Satellite Anomalous Event Monitor." Ohio University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1103127837.

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42

Combrink, Adriaan Zacharias Albertus. "Sensing atmospheric water vapour using the global positioning system." Doctoral thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/14811.

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Includes bibliographical references .<br>Atmospheric water vapour measurements are of importance to meteorologists, radio astronomers and geodesists. Precipitable water vapour (PWV) is a greenhouse gas to be reckoned with in numerical weather models and climate change studies, it is a nuisance in centimetre-wavelength radio astronomy and introduces range errors in space geodetic techniques. The propagation time of electromagnetic waves is the principal observable in the Global Positioning System (GPS). Accurate estimates of the delays experienced by the radio signals travelling from the satellites to ground-based receivers are made during the post-processing of GPS observations. In combination with meteorological observations made at the receiver, the estimated delays can be used to determine the amount of integrated precipitable water vapour along the signal path. In this thesis an overview of the basic GPS principles and components is provided, as well as a derivation, from first physical principles, of the mechanisms contributing to the delay experienced by a radio signal traversing the ionosphere and troposphere. Implementing this theoretical background, PWV and tropospheric delays are estimated and compared to measurements made by other techniques, namely radiosondes, water vapour radiometry and very long baseline interferometry (VLBI). A high degree of correlation is observed in all instances of inter-technique comparison. The usefulness of GPS-derived slant delays is demonstrated by their ability to reduce VLBI inter-station baseline repeatabilities when they are included in the VLBI analysis. However, this contributed to a higher mean formal baseline error. Furthermore, it shown that GPS-derived slant delay accuracies, when compared to radiometry, can be improved through the stacking of GPS processing residuals to make corrections for the effects of multi path and antenna phase centre variations. A modified residual stacking (MRS) method is proposed, in which data weighting is based on a measured autocorrelation function; however, in most instances the more complex MRS failed to significantly improve on the corrections made by normal residual stacking. GPS-derived PWV time-series from thirty South African stations for a four-year period are presented. A four-parameter model was fitted to the time-series to correct for seasonal effects and detect linear trends. It is shown that an autoregressive moving average (ARMA) model is required to estimate realistic trend uncertainties, rather than the white-noise model implicit in standard least-squares analyses. Furthermore, significant trends in PWV were observed in South Africa with the central parts showing a decrease in PWV during the study period, while an increase is observed over the southwest and northeast. These trends coincide with a temperature increase observed over the whole of South Africa for the study period. A hypothesis is presented to explain the different trends, based on the different sources of PWV in different climate areas. Lastly, vertical earth tide displacements (VETD) measured by gravimetry are compared to the modelled VETD applied during GPS processing. It is shown that rnismodelled VETD can contribute significant errors to GPS-derived PWV. A number of methods to mitigate this error are proposed and compared to each other, including a novel technique to accurately measure VETD by GPS.

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43

Marti, Lukas Michael. "Global Positioning System interference and satellite anomalous event monitor." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1103127837.

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44

Ge, Linlin School of Geomatic Engineering UNSW. "Development and Testing of Augmentations of Continuously-Operating GPS Networks to Improve Their Spatial and Temporal Resolution." Awarded by:University of New South Wales. School of Geomatic Engineering, 2000. http://handle.unsw.edu.au/1959.4/17867.

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Continuously-operating networks of GPS receivers (CGPS) are not capable of determining the characteristics of crustal deformation at the fine temporal or spatial scales required. Four ???temporal densification schemes??? and two 'spatial densification schemes' to augment the CGPS networks have been developed and tested. The four ???temporal densification schemes??? are based on the high rate Real-Time Kinematic (RTK) GPS technique, GPS multipath effects, Very Long Baseline Interferometry (VLBI) and Satellite Laser Ranging (SLR). The 'serial scheme' based on using GPS as a seismometer has been proposed. Simulated seismic signals have been extracted from the very noisy high rate RTK-GPS results using an adaptive filter based on the least-mean-square algorithm. They are in very good agreement with those of the collocated seismometers. This scheme can improve the CGPS temporal resolution to 0.1 second. The 'retro-active scheme' takes advantage of the fact that the GPS multipath disturbance is repeated between consecutive days. It can therefore provide a means of correcting multipath errors in the observation data themselves. A reduction of the standard deviations of the pseudo-range and carrier phase multipath time series to about one fourth and one half the original values respectively, has been demonstrated. The 'all-GPS parallel scheme' uses the multipath effects as a signal to monitor the antenna environment. Models relating the changes of multipath and antenna environment have been derived. The 'cross-technique parallel scheme' integrates the collocated CGPS, VLBI and SLR results, taking advantage of the decorrelation among their biases and errors. Crustal displacement signature has been extracted as a common-mode signal using data from two stations: Matera in Italy and Wettzell in Germany. Two 'spatial densification schemes' which can verify with each other have been developed and tested. The 'soft' scheme integrates CGPS with radar interferometry (InSAR). The Double Interpolation and Double Prediction (DIDP) approach combines the strengths of the high temporal resolution of CGPS and the high spatial resolution possible with the InSAR technique. This scheme can improve the spatial resolution to about 25m. The 'hard' scheme requires the deployment of single-frequency receivers to in-fill the present CGPS arrays. Alternatively some receivers may be installed at some geophysically strategic sites outside existing CGPS arrays. The former has been tested within Japan's GEONET, while the latter has been tested using a five-station array.

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Satirapod, Chalermchon Surveying &amp Spatial Information Systems Faculty of Engineering UNSW. "Improving the GPS Data Processing Algorithm for Precise Static Relative Positioning." Awarded by:University of New South Wales. School of Surveying and Spatial Information Systems, 2002. http://handle.unsw.edu.au/1959.4/18244.

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Since its introduction in the early 1980????s, the Global Positioning System (GPS) has become an important tool for high-precision surveying and geodetic applications. Carrier phase measurements are the key to achieving high accuracy positioning results. This research addresses one of the most challenging aspects in the GPS data processing algorithm, especially for precise GPS static positioning, namely the definition of a realistic stochastic model. Major contributions of this research are: (a) A comparison of the two data quality indicators, which are widely used to assist in the definition of the stochastic model for GPS observations, has been carried out. Based on the results obtained from a series of tests, both the satellite elevation angle and the signal-to-noise ratio information do not always reflect the reality. (b) A simplified MINQUE procedure for the estimation of the variance-covariance components of GPS observations has been proposed. The proposed procedure has been shown to produce similar results to those from the standard MINQUE procedure. However, the computational load and time are significantly reduced, and in addition the effect of a changing number of satellites on the computations is effectively dealt with. (c) An iterative stochastic modelling procedure has been developed in which all error features in the GPS observations are taken into account. Experimental results show that by applying the proposed procedure, both the certainty and the accuracy of the positioning results are improved. In addition, the quality of ambiguity resolution can be more realistically evaluated. (d) A segmented stochastic modelling procedure has been developed to effectively deal with long observation period data sets, and to reduce the computational load. This procedure will also take into account the temporal correlations in the GPS measurements. Test results obtained from both simulated and real data sets indicate that the proposed procedure can improve the accuracy of the positioning results to the millimetre level. (e) A novel approach to GPS analysis based on a combination of the wavelet decomposition technique and the simplified MINQUE procedure has been proposed. With this new approach, the certainty of ambiguity resolution and the accuracy of the positioning results are improved.

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46

Scott-Young, Stephen. "Integrated position and attitude determination for augmented reality systems /." Connect, 2004. http://eprints.unimelb.edu.au/archive/00000827.

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47

Ferebee, J. Michel. "Maximizing situational awareness improving situational awareness with global positioning system data in the maritime environment." Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/March/09Mar%5FFerebee.pdf.

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Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, March 2009.<br>Thesis Advisor(s): Bordetsky, Alex ; Bourakov, Eugene. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: Global Positioning System, GPS, Situational Awareness, Maritime Domain Awareness. Includes bibliographical references (p. 55-57). Also available in print.

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Mao, Jen-hao. "New algorithm for on-the-fly ambiguity resolution of real-time differential GPS positioning /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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49

Lindy, Fred L. "Differential solutions using long-range, dual-frequency GPS correction data." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FLindy.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 2002.<br>Thesis advisor(s): James R. Clynch, James N. Eagle, Samuel E. Buttrey. Includes bibliographical references (p. 77-79). Also available online.

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Deckert, Christopher J. "Canopy, terrain, and distance effects on Global Positioning System position accuracy." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-040816/.

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