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dc.contributor.authorGermroth, Matthew Ryanen_US
dc.date.accessioned2014-03-14T21:36:13Z
dc.date.available2014-03-14T21:36:13Z
dc.date.issued2005-04-28en_US
dc.identifier.otheretd-05162005-203359en_US
dc.identifier.urihttp://hdl.handle.net/10919/42676
dc.description.abstractThe Global Positioning System (GPS) has recently become the significant mapping tool for millions of customers worldwide, providing its users with accurate terrestrial positions almost instantaneously. The functionality of a GPS receiver depends on the number of satellites to which it can establish an unobstructed line of sight. Current satellite availability prediction tools perform satellite visibility predictions without considering terrain or structures that block GPS signals, a major issue in mountainous and urban areas. This paper describes a new Geographic Information Systems (GIS) tool, a customization of ArcGIS named Satellite Viewsheds, which predicts satellite visibility for any place and time while considering line of sight obstructions. Satellite Viewsheds requires a raster surface model, the test date and time, and the orbital properties of the satellites. It produces grids depicting the number of visible satellites and optimal viewing time for every cell in the grid. Satellite Viewsheds allows users to avoid areas of signal loss and choose the best time to map using their GPS receivers. The field test of Satellite Viewsheds proved that the tool performs satellite visibility predictions consistently and accurately. The research outlined in this paper indicates that Satellite Viewsheds is the first tool of its kind.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartGermroth_Body_Matter.pdfen_US
dc.relation.haspartGermroth_Back_Matter.pdfen_US
dc.relation.haspartGermroth_Front_Matter.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectviewsheden_US
dc.subjectsatelliteen_US
dc.subjecturban canyonen_US
dc.subjectvisibilityen_US
dc.subjecthillshadeen_US
dc.subjectGISen_US
dc.subjectGPSen_US
dc.titleGIS and Satellite Visibility: Viewsheds from Spaceen_US
dc.typeThesisen_US
dc.contributor.departmentGeographyen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineGeographyen_US
dc.contributor.committeechairCarstensen, Laurence William Jr.en_US
dc.contributor.committeememberHall, Christopher D.en_US
dc.contributor.committeememberBostian, Charles W.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05162005-203359/en_US
dc.date.sdate2005-05-16en_US
dc.date.rdate2005-05-24
dc.date.adate2005-05-24en_US


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