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 19 of 19 for “"constellation design"”.
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Broadband satellite constellation design & evaluation
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Satellite constellation design for mid-course ballistic missile intercept
… will establish a conceptual approach to the design of constellations for satellite-based mid-course missile defense. The ballistic missile intercept problem leads to a new paradigm of coverage where interceptor "reachability" replaces line-of-sight coverage. Interceptors in this concept are …
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Investigation of Orbital Debris Situational Awareness with Constellation Design and Evaluation
… A potential long-term solution is to employ a constellation of observation satellites within these debris clusters to improve monitoring and characterization efforts, and engage in Laser Debris Removal (LDR) as means of collision mitigation. Here we adapted and improved a previous methodology …
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Development of a Special Purpose End-to-End Satellite Constellation Design Methodology
… the capacity to economically deploy satellite constellations. These constellations are profoundly versatile, with the potential to allow researchers to gather large volumes of data from astronomy and Earth-observing missions over an unconstrained mission lifetime. However, many current …
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Heterogeneous Satellite Constellation Design for Cislunar Space Situational Awareness Using Real Options Analysis
… of large, dynamic, heterogeneous satellite constellation architectures by focusing on a multi-mode cislunar (SSA) capability. The combination of technical performance models, financial models, and real options analyses into a single tool allows system architects to identify and maintain …
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Orbital Constellation Design and Analysis Using Spherical Trigonometry and Genetic Algorithms: A Mission Level Design Tool for Single Point Coverage on Any Planet
… interest surrounding large scale satellite constellations has increased analysis efforts to create the most efficient designs. Multiple studies have successfully optimized constellation patterns using equations of motion propagation methods and genetic algorithms to arrive at optimal …
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Design and control of microsatellite clusters for tracking missions
… of microsatellites. This thesis addresses the design of microsatellite clusters to accurately track a target in a probabilistic suborbital occupancy corridor by pursuing the following: orbit determination using optimal measurement principles, cluster design heuristics and fuel optimal cluster …
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Tradespace analysis for Earth Observation Constellations : a value driven approach
… and development, but the tools to analyze EO constellations and space systems are lagging behind the curve. In particular, as costs continue to decrease to the point where constellations are treated like commodities, it is critical to look past cost and towards value creation when designing …
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A methodology for the derivation of survivability and reliability requirements for a Strategic Defense System
… reliability have become important factors in the design of a mission effective Strategic Defense System (SDS) that protects the United States against a ballistic missile attack by the Soviet Union. The SDS must be reliable and responsive in providing this defense. It must also be survivable to …
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Lyapunov feedback control in equinoctial elements applied to low thrust control of elliptical orbit constellations
For a typical satellite constellation design problem, sometimes there are two conflicting goals. On one hand one wishes to provide continuous coverage of a particular area. On the other hand one would like to use the minimum number of satellites as possible. For coverage locations nearer the …
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A commercial architecture for satellite imagery
… amount of risk as well as production time. A constellation of commercial satellites that are reconstituted on a monthly or quarterly cycle could also invigorate the commercial satellite work force and better produce future systems. A disadvantage with an architecture of commercial satellites …
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Dynamics and Control of Satellite Relative Motion: Designs and Applications
… the dissertation presents new findings for design rules and classifications of closed and periodic parametric relative orbits. A new observation from the findings states that the orbit shape resulting from the relative motion dynamics of circular orbit cases in polar views are exactly the …
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Navigation using Radio-Frequency Observables from LEO Constellations with Possible Aiding from an Inertial Navigation System
… signals from massive LEO satellite constellations. This work aids in the creation of a navigation system independent of current GNSS. A tightly-coupled carrier Doppler shift/INS filter is developed to determine the feasibility of using signals of opportunity from LEO satellites for …
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Optimization of Disaggregated Space Systems Using the Disaggregated Integral Systems Concept Optimization Technology Methodology
… DISCO-Tech is a modular space system design tool that focuses on the optimization of disaggregated and non-traditional space systems. It uses a variable-length genetic algorithm to simultaneously optimize orbital parameters, payload parameters, and payload distribution for space …
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Uncertainty-Based Design Optimization and Decision Options for Responsive Maneuvering of Reconfigurable Satellite Constellations
… the ground response. Reconfigurable satellite constellations can provide on-demand regional coverage by maneuvering orbits to focus passes over the area of interest. In contrast, traditional satellite constellations cannot maneuver to pass over specific ground locations, meaning that achieving …
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Rapid On-Demand Launch Mission Planning for Timely Delivery of Spacecraft Constellations
… of space-assets limits the effectiveness of constellations already on-orbit to be operationally responsive in military space. Time-sensitive returns using scheduling algorithms for the timely deployment of a nanosatellite constellation can be achieved. Four case studies show the capability to …
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Modeling the Future Space Debris Population and Orbital Capacity
… vitalized Low Earth Orbit (LEO) environment. Megaconstellations consisting of hundreds to hundreds of thousands of satellites have been proposed, with SpaceX’s Starlink satellite constellation now reaching more than 5400 operational satellites. This denser LEO environment underscores the urgent …
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From the Earth to the Moon: A Multi-Domain Approach to Cislunar Space Domain Awareness
… task. The first study optimizes future satellite constellation configurations of optical sensors placed on periodic orbits within the Circular Restricted Three-Body Problem (CR3BP) through the development of a novel multivariate normal crossover technique for Genetic Algorithms that enables …