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Item Information   Holdings       More by this author     Schafer, David P., author.     Seubert, Dr. Jill, thesis advisor     Kumpaty, Dr. Subha     Shimek, Gary     Milwaukee School of Engineering     Subjects     Artificial satellites in telecommunication -- Orbits     Astrodynamics     Space vehicles -- Control systems     Space vehicles -- Dynamics.     Solar energy     MSE Project.     Browse Catalog     by author:      Schafer, David P., author.      Seubert, Dr. Jill, thesis advisor      Kumpaty, Dr. Subha      Shimek, Gary      Milwaukee School of Engineering       by title:      Examining forces at ...         MARC Display

Examining forces at geosynchronous orbit with uncontrolled Galaxy 15 wide area augumentation system ephemerides : a report submitted to the faculty of the Milwaukee School of Engineering in partial fulfillment of the requirements for the degree of Master of Science in Engineering / by David P. Schafer. by Schafer, David P., author., Seubert, Dr. Jill, thesis advisor, Kumpaty, Dr. Subha, Shimek, Gary, Milwaukee School of Engineering [Milwaukee School of Engineering], [2017] Subjects Artificial satellites in telecommunication -- Orbits   Astrodynamics   Space vehicles -- Control systems   Space vehicles -- Dynamics.   Solar energy   MSE Project. Description:  81 leaves : illustrations, some of which are in color ; 29 cm Contents:  Introduction -- Project description -- Methods -- Results and discussion -- Conclusions and recommendations -- References. In April of 2010, control of cable communications satellite Galaxy 15 was lost. The satellite remained uncontrolled, drifting in free orbit, for over nine months before control was resumed. During its drift, Galaxy 15 continued to transmit position data. These drift position data offer a unique opportunity to investigate the forces in the geostationary orbit regime. The purpose of the project that is described in this report was to compare the empirical data from Galaxy 15's uncontrolled period with a high-fidelity geosynchronous orbit dynamic model. The dynamic model was constructed with MATLAB, and was verified by use of the satellite's ephemerides over a full month of propagation data. The model was then run for each perturbation force, simulated separately, in order to find the specific effects of each perturbation force. The project report contains an analysis of the forces, and a conclusion concerning how each force affects the orbit regime. Each force examined is found to have a large effect in at least one classical direction. Form:  text unmediated volume web address:  http://milwaukee.sdp.sirsi.net/client/en_US/search/asset/261   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .S247 2017 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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