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 1360 for “"Orbit"”.
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Evolution of orbit-orbit resonances in the solar system.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1972.
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On-Orbit Servicing System Architectures for Proliferated Low Earth Orbit Constellations
On-orbit servicing (OOS) presents new opportunities for refueling, inspection, repair, maintenance, and upgrade of spacecraft (s/c). OOS is a significant area of need for future space growth, enabled by the maturation of technology and the economic prospects. This congestion is leading s/c …
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Optical Orbit Tracking and Estimation
<p>Angles-only initial orbit determination methods are currently limited in their use as they require some prior knowledge of where the observed object will be and when it will be there. This research aims to produce a viable method to automate this process so that objects whose trajectories are …
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Strong Orbit Equivalence and Residuality
… minimal Cantor systems, in particular strong orbit equivalence. By constructing the systems, we show that there exist two nonisomorphic substitution systems that are both Kakutani equivalent and strongly orbit equivalent. We go on to define a metric on a strong orbit equivalence class of …
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Spin-orbit coupled Bose gases
… spin-dependent gauge fields, such as spin-orbit coupling. Motivated by this goal our lab explored several approaches to generate a one-dimensional spinorbit coupling interaction, which has a rich phase diagram and plays an important role for topological insulators, the quantum spin Hall …
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Spin-orbit resonance of Mercury.
Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. Thesis. 1969. Ph.D.
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The orbit of the moon.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1971.
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Kalman Filter Implementation to Determine Orbit and Attitude of a Satellite in a Molniya Orbit
… and implementation of an attitude and orbit determining Kalman filter algorithm for a satellite in a Molniya orbit. To apply the Kalman Filter for orbit determination, the equations of motion of the two body problem were propagated using Cowell's formulation. Four types of perturbing …
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Limitations of Initial Orbit Determination Methods for Low Earth Orbit CubeSats with Short Arc Orbital Passes
… focus on the performance of angles only initial orbit determi- nation (IOD) methods on observational data of low Earth orbit (LEO) CubeSats. Using data obtained by Lockheed Martin’s Space Object Tracking (SpOT) facil- ity, four methods: Gauss, Double-R, Gooding and Assumed Circular, will use …
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Information Measures For Statistical Orbit Determination
… requires frequent and accurate monitoring for orbit maintenance and collision avoidance using methods for statistical orbit determination. Statistical orbit determination enables us to obtain estimates of the state and the statistical information of its region of uncertainty given by the …
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On-Orbit Cryogenic Propellant Storage Optimization
<p>The optimization of an on-orbit Cryogenic Propellant Storage (CPS) system enables human exploration missions by reducing launch vehicle mass to orbit requirements and providing an extensible approach for human spaceflight missions to near-Earth asteroids, the moon, and Mars. The optimal CPS …
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Orbit: Online Reduced Bandwidth Information Transmission
Made available in DSpace on 2014-12-10T19:06:43Z (GMT). No. of bitstreams: 1 7121194.pdf: 3131714 bytes, checksum: 973f7b742a96c8c90df0681b513f0af9 (MD5) Previous issue date: 1971
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Optimization of electric propulsion orbit raising
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
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Characterization of on-orbit robotic assembly
On-orbit assembly missions typically involve humans-in-the-loop and use large custom-built robotic arms designed to service existing modules. The concept of on-orbit robotic assembly of modularized CubeSat components supports use cases such as rapidly placing failed nodes within a constellation of …
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On-orbit servicing for satellite upgrades
… during their long design lifetimes. On-orbit servicing could change this paradigm by providing a physical access to the satellite after it has been deployed. Satellite upgrade appears as a very promising application. On-orbit servicing could offer a broader range of upgrades than current …
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Introducing spin-orbit interaction in graphene
… central to modern nanoscience. However, the spin-orbit interaction (SOI) naturally present in graphene is extremely weak and has yet to be observed experimentally. This presents an obstacle for accessing novel phenomena in transport and optics, in particular those related to topological …
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SPIN-ORBIT COUPLING IN STRONGLY CORRELATED SYSTEMS
… materials with heavy elements, both strong spin-orbit coupling and Coulomb interactions are possible to exist. Both can significantly change the properties of materials. The coexistence of them can induce more interesting phenomena in solids. In this dissertation, three different cases involved …
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On-orbit serviceability of space system architectures
On-orbit servicing is the process of improving a space-based capability through a combination of in-orbit activities which may include inspection; rendezvous and docking; and value-added modifications to a satellite's position, orientation, and operational status. As a means to extend the useful …
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