Dissertation/Thesis Abstract

Negating the Yearly Eccentricity Magnitude Variation of Super-synchronous Disposal Orbits due to Solar Radiation Pressure
by Jones, S. L., M.S., University of Colorado at Boulder, 2013, 79; 1539339
Abstract (Summary)

Solar radiation pressure alters satellites' eccentricity by accelerating and decelerating them during each orbit. The accumulated perturbation cancels yearly for geostationary satellites, but meanwhile the perigee radius changes. Disposed satellites must be reorbited higher to compensate, using more fuel. The examined disposal orbit points toward the Sun and uses the satellite's natural eccentricity. This causes the eccentricity vector to only change direction, keeping the perigee radius constant. This thesis verifies this behavior over one year with an analytical derivation and MATLAB simulation, gaining useful insights into its cause. The traditional and proposed disposal orbits are then modeled using NASA's GMAT for more realistic simulations. The proposed orbit's sensitivity to satellite and initialization errors is also examined. Relationships are developed to show these errors' effect on the perigee radius. In conclusion, while this orbit can be used in the short term, margins are necessary to guarantee protection of the geostationary belt.

Indexing (document details)
Advisor: Schaub, Hanspeter
Commitee: Axelrad, Penina, Parker, Jeffrey
School: University of Colorado at Boulder
Department: Aerospace Engineering
School Location: United States -- Colorado
Source: MAI 51/06M(E), Masters Abstracts International
Subjects: Engineering, Aerospace engineering
Keywords: Disposal orbit, Eccentricity, Geostationary, Orbit perturbation, Satellite, Solar radiation pressure
Publication Number: 1539339
ISBN: 978-1-303-14441-7
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