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 132 for “"interplanetary"”.
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Interplanetary midcourse guidance analysis
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1963.
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Interplanetary collisionless shock waves.
Thesis (Sc D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1970.
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Interplanetary Ridesharing: Exploring Potential CubeSat Trajectories
… to deployment that explores new possibilities of interplanetary CubeSats. In this approach there are three categories of objective functions that are defined by the type of trajectory of a “primary” spacecraft, which carries the CubeSat deployer. These categories are flyby, orbiter, and lander. …
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The Dynamics of Charged Interplanetary Grains
Made available in DSpace on 2014-12-09T18:34:00Z (GMT). No. of bitstreams: 1 6901459.pdf: 3916106 bytes, checksum: e7a3bb5157ddc155d8e19c2c1c07a94e (MD5) Previous issue date: 1968
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Guidance of low-thrust interplanetary vehicles
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1964
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TOF-SIMS analyses of interplanetary dust particles
Diese Arbeit ist Teil einer umfassenden Untersuchung von interplanetaren Staubteilchen (IDPs), die in der Stratosphäre gesammelt werden. IDPs können grundlegende Informationen über das frühe und äußere Sonnensystem liefern. Das oberste Ziel ist zunächst eine eindeutige Unterscheidung ihrer …
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Interplanetary Trajectory Optimization with Automated Fly-By Sequences
… Evolutionary Algorithms (EA) that analyze interplanetary trajectories for multiple gravity assist (MGA) missions. One limitation of STOpS and other spacecraft trajectory optimization programs (GMAT and Pygmo/Pagmo) is that they require a defined encounter body sequence to produce a constant …
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Orbital Optimization of Interplanetary Trajectories with Environmental Perturbations
… more robust solution for dealing with optimized interplanetary trajectories. Two proven trajectories will be focused on for the main analysis of this thesis which are the trajectories taken by Voyager 2 in the tour of the solar system as well as Cassini's mission to Saturn. When perturbations …
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Automated trajectory planning for multiple-flyby interplanetary missions
… variables and categorical variables. In interplanetary trajectory design problems the categorical variables will typically specify the sequence of planets at which to perform flybys, and the real-valued variables will represent the launch date, flight times between planets, magnitudes and …
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Analyzing the large-scale curvature of interplanetary shocks
The 3-dimensional structure of interplanetary shock surfaces are analyzed using observations from the Wind and ACE spacecraft. Events seen by both spacecraft were selected from the available data and used to calculate the radius of curvature R, of the shock surface. The surface structure was …
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Orbital Maneuvers and Interplanetary Trajectory Design via Reinforcement Learning
<p>This dissertation investigates the application of reinforcement learning (RL) to the design and optimization of low-thrust spacecraft trajectories, with an emphasis on autonomy, adaptability, and robustness in the presence of system uncertainties and unmodeled perturbations. Classical approaches …
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Nanosatellite Probes in Interplanetary Space: An Augmented Cassini Mission
<p>The exploration of interplanetary space is one of the most challenging and costly ventures in human history. The relatively low amount of information on other sites beyond Earth is largely due to the rarity of effective trajectories as well as the high levels of risk and complexity inherent in …
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Extracting scientific information from interplanetary spacecraft radio tracking data.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1971
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Interplanetary Transfer Trajectories Using the Invariant Manifolds of Halo Orbits
<p>Throughout the history of interplanetary space travel, the Newtonian dynamics of the two-body problem have been used to design orbital trajectories to traverse the solar system. That is, that a spacecraft orbits only one large celestial body at a time. These dynamics have produced impressive …
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Application of ion electrospray propulsion to lunar and interplanetary missions
… propulsion systems enable ambitious lunar and interplanetary missions that return a wealth of scientific data. Many of these technologies are difficult to scale down, meaning the spacecraft are relatively massive and expensive. The Space Propulsion Lab (SPL) at the Massachusetts Institute of …
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Correlation of the interplanetary magnetic field with auroral form and latitudinal position
Hourly values of the interplanetary magnetic field were compared with photographs of the auroral zone taken by satellite. The photographs were first classified according to the level of auroral activity. It was found that there was a correlation between the north-south component of the magnetic …
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Interplanetary trajectory analysis for 2020-2040 Mars missions including Venus flyby opportunities
… a tool which is capable of calculating ballistic interplanetary trajectories with planetary flyby options based on the knowledge of astrodynamics and analyzes Mars trajectories in the time frame 2020 to 2040, including transfer trajectories with Venus flybys. Using the trajectory programs …
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A Hypothetical Exploration of Survival, Colonisation and Interplanetary Relations Around the planet Mars
Three novellas exploring the short and long-term implications of Martian colonisation and an explication. The first part examines the necessity of a robust and mentally-fit crew along with the relationships between corporatism. The second, which happens a century later, explores the health effects …
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