Spelling suggestions: "subject:"positioning system"" "subject:"apositioning system""
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Global Positioning System based runway instrumentation systemMitrovic, Predrag Stanimir January 2001 (has links)
No description available.
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Averaging correlation for weak Global Positioning System signal processingZhu, Zhen January 2002 (has links)
No description available.
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Investigating global positioning system helibowl antenna performance sensitivity with variation in design parametersSurathu, Mahesh January 1999 (has links)
No description available.
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Block processing techniques for the global positioning systemFeng, Gang January 2003 (has links)
No description available.
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Error sources affecting differential or ground monitored operation of the navstar global positioning systemSharma, Sanjaya January 1987 (has links)
No description available.
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Fault detection algorithm for Global Positioning System receiversChoi, Sang-Sung January 1991 (has links)
No description available.
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Field Evaluation Methodology for Quantifying Network-wide Efficiency, Energy, Emission, and Safety Impacts of Operational-level Transportation ProjectsSin, Heung Gweon 28 September 2001 (has links)
This thesis presents a proposed methodology for the field evaluation of the efficiency, energy, environmental, and safety impacts of traffic-flow improvement projects. The methodology utilizes Global Positioning System (GPS) second-by-second speed measurements using fairly inexpensive GPS units to quantify the impacts of traffic-flow improvement projects on the efficiency, energy, and safety of a transportation network. It should be noted that the proposed methodology is incapable of isolating the effects of induced demand and is not suitable for estimating long-term impacts of such projects that involve changes in land-use. Instead, the proposed methodology can quantify changes in traffic behavior and changes in travel demand.
This thesis, also, investigates the ability of various data smoothing techniques to remove such erroneous data without significantly altering the underlying vehicle speed profile. Several smoothing techniques are then applied to the acceleration profile, including data trimming, Simple Exponential smoothing, Double Exponential smoothing, Epanechnikov Kernel smoothing, Robust Kernel smoothing, and Robust Simple Exponential Smoothing. The results of the analysis indicate that the application of Robust smoothing (Kernel of Exponential) to vehicle acceleration levels, combined with a technique to minimize the difference between the integral of the raw and smoothed acceleration profiles, removes invalid GPS data without significantly altering the underlying measured speed profile
The methodology has been successfully applied to two case studies provided insights as to the potential benefits of coordinating traffic signals across jurisdictional boundaries. More importantly two case studies demonstrate the feasibility of using GPS second-by-second speed measurements for the evaluation of operational-level traffic flow improvement projects. To identify any statistically significant differences in traffic demand along two case study corridors before and after traffic signal condition, tube counts and turning counts were collected and analyzed using ANOVA technique. The ANOVA results of turning volume counts indicated that there is no statistically significant difference in turning volumes between the before and after conditions. Furthermore, the ANOVA results of tube counts also confirmed that there did not appear to be a statistically significant difference (5 percent level of significance) in the tube counts between the before and after conditions. / Ph. D.
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GPS RECEIVER SELECTION AND TESTING FOR LAUNCH AND ORBITAL VEHICLESSchrock, Ken, Freestone, Todd, Bell, Leon 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / NASA Marshall Space Flight Center’s Bantam Robust Guidance Navigation & Control Project is investigating off the shelf navigation sensors that may be inexpensively combined into Kalman filters specifically tuned for launch and orbital vehicles. For this purpose, Marshall has purchased several GPS receivers and is evaluating them for these applications. The paper will discuss the receiver selection criteria and the test equipment used for evaluation. An overview of the analysis will be presented including the evaluation used to determine their success or failure. It will conclude with goals of the program and a recommendation for all GPS users.
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Reconstructing ionospheric TEC over South Africa using signals from a regional GPS network /Opperman, B. D. L. January 2007 (has links)
Thesis (Ph.D. (Physics & Electronics)) - Rhodes University, 2008.
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Indoor Mobile Positioning system (MPS) classification in different wireless technology domainGhandchi, Bahram, Saleh, Taha January 2018 (has links)
The main purpose of this thesis work is to find and compare different network characteristics of MPS (Mobile Positioning System) in the different wireless technology domains. Since decades ago MNO’s (Mobile Network Operators) added many new services based on the geographical areas of subscribers and their needs. Here we define wireless networks and go through different types of technologies and do the comparison when they collect different types of data for their location-based services and see if we could have the same accuracy with 2G (second generation) of mobile network as like as 3G (third generation) and higher. Finally, we will come up with a proposal for new age technology.
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