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Dissertations / Theses on the topic 'Global positiong system'

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Published: 4 June 2021
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1

Tiesler, Russell Colin, and n/a. "A Decade of GPS geodesy in the Australian region: a review of the GDA94 and its performance within a time series analysis of a 10 year data set in ITRF 2000." University of Canberra. Information Sciences & Engineering, 2005. http://erl.canberra.edu.au./public/adt-AUC20051202.114435.

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The University of Canberra (UC) has been involved in GPS processing since the late 1980s. This processing commenced with the GOTEX 1988 campaign and progressed through a series of project specific regional campaigns to the current daily processing of a distributed set of continuously operating sites for the determination of precise GPS station positions for user applications. Most of these earlier campaigns covered only short periods of time, ranging from a few weeks to multiple occupations of a few days to a time over one to two years. With software developments, these multiple occupations were able to be combined to produce results from which crustal motion velocities could be extracted. This first became feasible with the processing of the Australian National Network (ANN), which yielded realistic tectonic velocities from two occupations (1992 and 1993) of sites 12 months apart. Subsequently, this was successfully extended by a further 12 months, with re-occupation of certain sites for a third time in 1994. Analysis of the results indicated that the accuracy of determining the earth signals improved as the time span from first to last observation was increased. The same was true also for the determination of the position of global references sites. However, by current standards the results achieved were poor. Consequently, the process was extended to combine the results of subsequent campaigns with the original ANN data set. From 1995 to 1999, campaigns were conducted across Australia, covering many State and tide gauge sites included in the original ANN solution. These provided additional multiple occupations to improve the determinations for both position and velocity. UC has maintained a data set of the global IGS sites, commencing with the IGS pilot campaign of 1992. Daily data sets for those global sites, which contained days common to the regional campaigns, were processed to produce our own independent global orbit and reference frame connection. The motivation for doing so was fourfold. �Firstly, to see if historic data could be reprocessed using current modern software and thus be able to be incorporated in this and other analysts research programs. �Secondly, to compare the results of the reprocessing of the original data set using modern software with the original ANN solution and then validate both the solutions. �Thirdly, to extend the timespan of observations processed to include more recent campaigns on as many original sites as possible. This to achieve a stronger solution upon which to base the determination of an Australian tectonic plate velocity model and provide quality assurance on the solution comparisons with re-observed sites. �Fourthly, to develop a set of transformation parameters between current coordinate systems and the GDA94 system so as to be able to incorporate new results into the previous system. The final selection of regional and global sessions, spanning from mid 1992 to late 2002, contained almost 1000 individual daily solutions. From this 10 year data span a well determined rigid plate tectonic motion model was produced for Australia. This site velocity model was needed to develop a transformation between the thesis solution in ITRF00 an the GDA94 solution in ITRF92. The significant advantage of the plate velocity model is that all Australian sites can now have computed a realistic velocity, rather than being given a value which has been interpolated between sites whose velocities had been determined over a one or two year span. This plate velocity model is compared with the current tectonic motion NNR-NUVEL-1A model and other recently published models. To perform the comparison between the thesis solution in ITRF00 and the GDA solution in ITRF92 a transformation was developed between the two reference systems. This set of transformation parameters, in conjunction with the plate velocity model developed, enables site solutions at any epoch in the current ITRF00 to be converted onto the GDA94, and vice versa, with a simple, non-varying seven parameter transformation. The comparisons between the solutions are analysed for both horizontal position and height consistency. There were 77 sites whose differences were compared. The horizontal consistency was within estimated precisions for 75 of the 77 sites. However, the vertical comparisons revealed many of the single epoch sites, especially in 1992, have inconsistent results between the two solutions. The heights from this thesis for some West Australian sites were compared with analysis done by DOLA and the height recoveries are very similar, indicating a weakness in the GDA94 solution for some of the single epoch sites. Some of these differences have been resolved but others are still under investigation. This thesis describes the repocessing of the original ANN data set, the addition of later data sets, the results obtained, and the validation comparisons of the old and new solutions. As well as the plate velocity model, transformation is provided which enables the user to compute between the GDA94 system, and any epoch result in ITRF00. Recommendations are made as to which sites need additional work. This includes sites which only need further analysis or investigation and those which require further observations to achieve a result which will have acceptable accuracy and reliability.
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2

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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3

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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4

Biskaduros, Zachary Jon. "Collaborative Localization Enhancement to the Global Positioning System using Inter-Receiver Range Measurements." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23152.

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The localization of wireless devices, e.g. mobile phones, laptops, and handheld GPS receivers, has gained much interest due to the benefits it provides, including quicker emergency personnel dispatch, location-aided routing, as well as commercial revenue opportunities through location based services.  GPS is the dominant position location system in operation, with 31 operational satellites producing eight line of sight satellites available to users at all times making it very favorable for system implementation in all wireless networks.  Unfortunately when a GPS receiver is in a challenging environment, such as an urban or indoor scenario, the signal quality often degrades causing poor accuracy in the position estimate or failure to localize altogether due to satellite availability.  

Our goal is to introduce a new solution that has the ability to overcome this limitation by improving the accuracy and availability of a GPS receiver when in a challenging environment.  To test this theory we created a simulated GPS receiver using a MATLAB simulation to mimic a standard GPS receiver with all 31 operational satellites.  Here we are able to alter the environment of the user and examine the errors that occur due to noise and limited satellite availability.  Then we introduce additional user(s) to the GPS solution with the knowledge (or estimate) of the distances between the users.  The new solutions use inter-receiver distances along with pseudoranges to cooperatively determine all receiver location estimates simultaneously, resulting in improvement in both the accuracy of the position estimate and availability.
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5

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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6

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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7

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
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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8

Vickery, John Lawrence. "AN INTELLIGENT DIFFERENCING GLOBAL POSITIONING SYSTEM UTILIZING DIFFERENTIAL DOPPLER TO DETERMINE POSITION AND SPEED ACCURATELY." MSSTATE, 2002. http://sun.library.msstate.edu/ETD-db/theses/available/etd-03012002-121541/.

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It is not where in the world you are that matters. It is where you are with respect to a reference point whether on land or at sea. That is the basis behind Differencing GPS. Utilizing the carrier wave and Gold Code (GC) signal transmitted by GPS satellites, this project uses two GPS receivers and a system integration manager utilizing neural networks and expert systems to determine a user position and speed relative to a fixed point on earth. Two methods of determining the user position are employed: classic triangulation and measuring the difference in the Doppler shift of the carrier wave between the user and the reference receiver. The idea is for the user to know where they are in relationship to a designated fixed point and navigate with respect to that fixed point. The user could range from a farmer or an aircraft out at sea attempting to land on the deck of a carrier.
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9

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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10

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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11

Walchko, Kevin J. "Low cost inertial navigation learning to integrate noise and find your way /." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001193.

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12

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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13

Ankrum, Aaron G. "Application of systems engineering methods to the design of an aviation navigation system." Master's thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-03302010-020359/.

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14

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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15

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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16

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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17

Li, Xiaopeng. "Moving base INS/GPS vector gravimetry on a land vehicle." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195677222.

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18

Sizer, Scott Marshall. "Locating and mapping cemeteries in Loudon County, Virginia." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=623.

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Thesis (M.A.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains vi, 31 p. : maps. Includes abstract. Includes bibliographical references (p. 18-19).
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19

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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20

Grekoski, Edward D. "A systems engineering study of global positioning system installation onto Army aircraft." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA306229.

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21

Kiran, Sai. "An inertial measurement unit interface and processing system synchronized to global positioning system time." Ohio University / OhioLINK, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176489175.

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22

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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23

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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24

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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25

Kassan, Mark W. "Distributed Interactive Simulation: The Answer to Interoperable Test and Training Instrumentation." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/611445.

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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California
This paper discusses Global Positioning System (GPS) Range Applications Joint Program Office (RAJPO) efforts to foster interoperability between airborne instrumentation, virtual simulators, and constructive simulations using Distributed Interactive Simulation (DIS). In the past, the testing and training communities developed separate airborne instrumentation systems primarily because available technology couldn't encompass both communities' requirements. As budgets get smaller, as requirements merge, and as technology advances, the separate systems can be used interoperably and possibly merged to meet common requirements. Using DIS to bridge the gap between the RAJPO test instrumentation system and the Air Combat Maneuvering Instrumentation (ACMI) training systems provides a defacto system-level interoperable interface while giving both communities the added benefits of interaction with the modeling and simulation world. The RAJPO leads the test community in using DIS. RAJPO instrumentation has already supported training exercises such as Roving Sands 95, Warfighter 95, and Combat Synthetic Test, Training, and Assessment Range (STTAR) and major tests such as the Joint Advanced Distributed Simulation (JADS) Joint Test and Evaluation (JT&E) program. Future efforts may include support of Warrior Flag 97 and upgrading the Nellis No-Drop Bomb Scoring Ranges. These exercises, combining the use of DIS and RAJPO instrumentation to date, demonstrate how a single airborne system can be used successfully to support both test and training requirements. The Air Combat Training System (ACTS) Program plans to build interoperability through DIS into existing and future ACMI systems. The RAJPO is committed to fostering interoperable airborne instrumentation systems as well as interfaces to virtual and constructive systems in the modeling and simulation world. This interoperability will provide a highly realistic combat training and test synthetic environment enhancing the military's ability to train its warfighters and test its advanced weapon systems.
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26

Li, Jian. "Investigating the effect of the DGNSS SCAT-I data link on VOR signal reception." Ohio : Ohio University, 1996. http://www.ohiolink.edu/etd/view.cgi?ohiou1178220159.

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27

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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28

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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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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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
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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31

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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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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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.
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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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.
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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Chan, Ka Chun. "A dual channel location estimation system for mobile computing." HKBU Institutional Repository, 2003. http://repository.hkbu.edu.hk/etd_ra/445.

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37

Kline, Paul A. "Fault detection and isolation for integrated navigation systems using the global positioning system." Ohio : Ohio University, 1991. http://www.ohiolink.edu/etd/view.cgi?ohiou1183731476.

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38

Meyer, Steven J. "TIME, SPACE, POSITION INFORMATION UNIT MESSAGE STRUCTURE OVERVIEW." International Foundation for Telemetering, 2002. http://hdl.handle.net/10150/607515.

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International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California
The Joint Advanced Missile Instrumentation (JAMI) program is developing a Time, Space, and Position Information (TSPI) unit for high dynamic missile platforms by employing the use of Global Position System (GPS) and inertial sensors. The GPS data is uncoupled from the inertial data. The output of the JAMI TSPI unit follows the packet telemetry protocol and is called the TSPI unit message structure (TUMS). The packet format allows the data stream to stand on its own, be integrated into a packet telemetry system or be an asynchronous data channel in a PCM data stream. On the ground, the JAMI data processor (JDP) Kalman filters the GPS and inertial data to provide a real time TSPI solution to the ranges for display. This paper gives an overview of the message format, the timing relationships between the GPS data and inertial data, and how TUMS is to be handled by the telemetry receiving site to hand it off to the JDP.
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39

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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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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41

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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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.

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.

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42

Cheng, King-yip, and 鄭勁業. "Localization in wireless sensor networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38700189.

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43

Diggle, David William. "An investigation into the use of satellite-based positioning systems for flight reference/autoland operations." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1173978322.

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44

Ebinuma, Takuji. "Precision spacecraft rendezvous using global positioning system an integrated hardware approach /." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3031047.

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45

Sehloho, Nobaene Elizabeth. "An indoor positioning system using multiple methods and tools." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2288.

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Thesis (MTech (Information Technology))--Cape Peninsula University of Technology, 2015.
Recently, the deployment and availability of wireless technology have led to the development of location and positioning services. These Location Based Services (LBSs) are attracting the attention of researchers and mobile service providers. With the importance of ubiquitous computing, the main challenge seen in the LBS is in the mobile positioning or localization within reasonable and certain accuracy. The Global Positioning System (GPS), as a widely known and used navigation system, is only appropriate for use in outdoor environments, due to the lack of line-of-sight (LOS) in satellite signals that they cannot be used accurately inside buildings and premises. Apart from GPS, Wi-Fi is among others, a widely used technology as it is an already existing infrastructure in most places. This work proposes and presents an indoor positioning system. As opposed to an Ad-hoc Positioning System (APS), it uses a Wireless Mesh Network (WMN). The system makes use of an already existing Wi-Fi infrastructure. Moreover, the approach tests the positioning of a node with its neighbours in a mesh network using multi-hopping functionality. The positioning measurements used were the ICMP echo requests, RSSI and RTS/CTS requests and responses. The positioning method used was the trilateral technique, in combination with the idea of the fingerprinting method. Through research and experimentation, this study developed a system which shows potential as a positioning system with an error of about 2 m – 3 m. The hybridization of the methods proves an enhancement in the system though improvements are still required
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46

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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Abstract:
International Telemetering Conference Proceedings / October 28-31, 1985 / Riviera Hotel, Las Vegas, Nevada
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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47

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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48

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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49

Henderson, Harold Paulk Bevly David M. "Relative positioning of unmanned ground vehicles using ultrasonic sensors." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Mechanical_Engineering/Thesis/Henderson_Harold_55.pdf.

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50

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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