Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 241 for “"Global Positioning System (GPS)"”.
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Phase multipath estimation for global positioning system (GPS) using signal-to-noise-ratio (SNR) data
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.
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Global Positioning System (GPS) measurements in Turkey (1988-1992) : kinematics of the African-Arabia-Eurasia plate collision zone
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
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The use of the Global Positioning System (GPS) on an attack aircraft to improve altitude accuracy during weapons delivery
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Locating and mapping cemeteries in Loudon County, Virginia
… into the countys geographic information system (GIS). The locational information was gathered through digitization and with a Global Positioning System (GPS). Once the cemetery locational information was in the GIS, it was then integrated into an existing land development process.
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Analysis and test of patch antennas for applications in dual-band and diversity systems
… for applications in dual-band and diversity systems is presented. The dual-band capability is achieved with two patches that are stacked vertically and coupled by an aperture in the lower patch. The aperture provides a convenient way of adjusting the separation between the resonant …
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Comparison of GPS Point Selection Methods for GIS Area Measurement of Small Jurisdictional Wetlands
… one-half acre. Impact area can be determined by Global Positioning System (GPS) measurement of wetland boundary and Geographic Information System (GIS) calculation of impact area. GPS point selection methods include (1) equal time interval, (2) transect and (3) intuition. Four two-acre shapes …
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Implementation of a Low Cost Micro Electro Mechanical Systems Inertial Navigation Solution
… testing aircraft. This low cost solution uses a Global Positioning System (GPS) coupled with an Inertial Navigation Solution (INS) to provide a more accurate, stable navigation solution that can be acceptable for aircraft navigation. Lab VIEW was utilized to perform data acquisition and …
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Investigation of refraction effects for small GPS networks
Using observations from the Global Positioning System (GPS) satellites to determine a three dimensional (3-D) geodetic control network are considered. The repeatability of individual baselines and 3-D vector closures are examined, in order to investigate refraction effects on GPS networks. The …
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A software defined GPS signal simulator design
The Global Positioning System (GPS) signal simulator plays a critical role in developing and testing GPS receivers. Unfortunately, very few commercial GPS signal simulators are user-friendly for security researchers because they fail to generate abnormal GPS signals, which are fundamentally …
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SH-3 helicopter/global positioning system integration analysis
The Global Positioning System (GPS) , the transmitted navigational signal, and the overall acquisition approach are explained. Navigational receiver components are functionally described and the hierarchy of platform integration and capability is discussed. Specifically explored is the integration …
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Indoor positioning using modulated echo radio localization instrument (MERLIN)
… important for numerous applications. Global Positioning System (GPS) has solved the issue of positioning and navigation for outdoor environments. However, it fails to achieve a good indoor performance due to the lack of line of sight with the GPS satellites as well as drastic signal …
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GeoPak : monitoring climbers and climate on Mount Everest
… and surrounding environment. It uses the Global Positioning System (GPS) and low power sensors to collect information about location, temperature, humidity, air pressure, and light. A radio transmitter then sends this information to a remote base station, letting people far away monitor …
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Open-Source Testbed to Evaluate the Cybersecurity of Phasor Measurement Units
… A major component of the device is the Global Positioning System (GPS) for time synchronization across the board. However, this device has become more susceptible to cyber-attacks such as spoofing. This paper constructs an opensource testbed for the playback of PMU data and testing of …
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Design and Development of an Autonomous Line Painting System
… a stabilized painting mechanism. The AGV accepts Global Positioning System (GPS) coordinates for waypoint navigation. A computer vision algorithm is developed to provide vision feedback to stabilize the painting mechanism. The system is demonstrated to follow an input desired trajectory and cancel …
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SIGNAL ANALYSIS AND RADIOHOLOGRAPHIC METHODS FOR AIRBORNE RADIO OCCULTATIONS
Global Positioning System (GPS) radio occultation (RO) is an atmospheric sounding technique utilizing the change in propagation direction and delay of the GPS signal to measure refractivity, which provides information on temperature and humidity. The GPS-RO technique is now operational on several …
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A content review of precision agriculture courses across the United States
… were obtained from 56 PA courses. Scope of PA, Global Positioning System (GPS), Differential GPS, Yield Monitoring, and Yield Map were all topics that were frequently discussed in PA courses, whether they were entryor advanced-level or two-year or four-year institutions. Review of the content …
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Predictability of VO2max from three commercially available devices
… two heart rate monitors (Device A and V) and a global positioning system (GPS) watch compared to measured VO2max. Methods: Forty participants, 22 males and 18 females ages 18 to 55, came to the Running Science Laboratory at Eastern Michigan University. During visit 1, participants completed a …
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Indoor Positioning Using Acoustic Pseudo-Noise Based Time Difference of Arrival
<p>The Global Positioning System (GPS) provides good precision on a global scale, but is not suitable for indoor applications. Indoor positioning systems (IPS) aim to provide high precision position information in an indoor environment. IPS has huge market opportunity with a growing number of …
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Autonomous quadrotor unmanned aerial vehicle for culvert inspection
… foundation for an Unmanned Aerial Vehicle (UAV) system for inspecting culverts. By expanding upon prior progress creating an autonomous indoor quadrotor, many basic hardware and software issues are solved. The main new functionality needed for the culvert inspection task was to utilize the Global …
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Testing the Re-designed SuperDARN HF Radar and Modeling of a Twin Terminated Folded Dipole Array
… Space weather impacts many technological systems including Global Positioning System (GPS), spacecraft orbits, power distribution, surveillance radar, HF communications and transpolar aviation. This thesis explores, in detail, the techniques and challenges of constructing, testing, and …
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