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 7 of 7 for “"Elliptical Orbits"”.
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Adaptive Extended Kalman Filtering Strategies for Autonomous Relative Navigation of Formation Flying Spacecraft
… viable in all orbit scenarios, including highly elliptical orbits in the presence of perturbations. The first Kalman filter approach uses maximum likelihood estimation techniques to derive analytical adaptations laws for the filter, and the second approach uses an embedded fuzzy logic system …
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The orbital dynamics of advanced planetary observation systems
… of this issue by developing novel spacecraft orbits to enhance the opportunities for remote sensing of Earth and the inner planets. Within this thesis, particular emphasis is placed on investigation of a system that can overcome the critical data deficit for the high-latitude regions of the …
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Modeling Satellite Formations In The Presence Of Perturbations
… in this area confine their research to circular orbits, with and without perturbation effects. This study will investigate apply orbital dynamic equations to the problem of maintaining satellite formations in both circular and elliptical orbits, with and without the presence of J2 gravity …
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Synchronous Thermal Instability Evaluation of Medium Speed Turbocharger Rotor-Bearing Systems
… supported turbomachinery are known to develop elliptical orbits as a result of rotor-bearing interactions, mass unbalance within the rotor, gravitational bending of the shaft and external excitation. In synchronous whirl, where the speed at which the shaft travels about the orbit is equal to …
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Orbit determination for medium altitude eccentric orbits using GPS measurements
… non-traditional medium altitude circular and elliptical orbits. These projects will track their satellites using the GPS system, which has been used on LEO satellites for several years. But can GPS be used as the sole input for the orbit determination of satellites in these medium altitude …
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Real time hardware in the loop simulation testbed of spacecraft formation flying
… characteristics of the GPS receiver for LEO orbits. This model simulates the relative dynamics of the GPS constellation and the LEO satellite. S3C2410 has been selected as the navigation processor. Radio transceivers are used to exchange data between the satellites. A uC/OS-II real time …
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Eccentricity of Merging Neutron Star Binaries: Searches, Parameter Estimation, and Future Prospects
… for neutron star binaries that have an eccentric orbits when their gravitational waves enter the sensitive band of Advanced LIGO and Virgo. For the detected binary neutron star mergers GW170817 and GW190425, Bayesian parameters estomation is used to constrain the binary's orbital eccentricity. …