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 44 for “"Orbital Debris"”.
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Orbital debris : drafting, negotiating, implementing a convention
… that while space may be infinite, Earth orbital space is a finite natural resource that must be managed properly. The problem we face with space pollution is complex and serious. The space treaties and conventions are not sufficient. They were drafted at the time of space exploration in …
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A Viable Orbital Debris Mitigation Mission using Active Debris Removal
… space environment contains a growing number of orbital debris objects. This growing orbital debris population increases collision probabilities between both orbital debris and functioning satellites. A phenomenon known as Kessler Syndrome can be induced if these collisions occur. Kessler …
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Investigation of Orbital Debris Situational Awareness with Constellation Design and Evaluation
Orbital debris is a current and growing threat to reliable space operations and new space vehicle traffic. As space traffic increases, so does the economic impact of orbital debris on the sustainability of systems that increasingly support national security and international commerce. Much of the …
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Starfish: A Compact, Biomimetic, and Adaptive Shape Memory Alloy Orbital Debris Remover
<p>This thesis aims to turn the tides on the orbital debris issue through the fabrication and demonstration of a compact, biomimetic, and adaptive shape memory alloy actuated orbital debris remover. The design, referred to as Starfish, is discussed in detail along with its fabrication process and …
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The Collisional Evolution of Orbital Debris in Geopotential Wells and Disposal Orbits
<p>This thesis investigates the orbital debris evolution in the geosynchronous disposal orbit regime and within geosynchronous orbits effected by the geopotential wells. A propagator is developed for the accurate simulation of GEO specific orbits and the required perturbations are determined and …
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Design, Fabrication, and Testing of an EMR Based Orbital Debris Impact Testing Platform
<p>This paper describes the changes made from Cal Poly’s initial railgun system, the Mk. 1 railgun, to the Mk. 1.1 system, as well as the design, fabrication, and testing of a newer and larger Mk. 2 railgun system. The Mk. 1.1 system is developed as a more efficient alteration of the original Mk. 1 …
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Assessment of damage to thermal protection systems due to micrometeoroid and orbital debris impacts
… cause mission failure due to micro-meteoroid and orbital debris damage is presented. This number differs based on the mission, so a methodology is presented to solve for this number. The methodology is comprised of two branches, the first branch solves for the critical depth and the second branch …
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Characterization of the Effects of a Sun-Synchronous Orbit Slot Architecture on the Earth's Orbital Debris Environment
… is performed. The long-term evolution of Earth's orbital environment is modeled by a set of coupled ordinary differential equations. A metric for quantifying the benefit, if any, of implementing a sun-synchronous architecture is developed. The results indicate that the proposed slot architecture …
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Orbital Debris Removal Technologies: A Hybrid Electrodynamic Tether and Ion Beam Shepherd Satellite Design for Fuel Efficient Contactless Debris Removal
<p>Space debris poses a serious threat to humanities efforts at space exploration as well as the expanding uses for earth-orbiting satellites. This thesis investigates the proposed technologies for the debris's removal both large and small. Focus is applied to the large debris removal technologies …
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Micrometeroid, orbital debris, and shielding analysis for the Soft X-ray Camera (SXC) of the High Energy Transient Explorer (HETE-2) spacecraft
… orbit, HETE-2 will encounter micrometeoroids and orbital debris. Micrometeoroids are the smallest natural particles in space and orbital debris are any inoperative, manmade objects remaining in Earth orbit. The major concern for CCDs in the SXC is that they are exposed to the micrometeoroids and …
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Long-term effects of satellite megaconstellations on the debris environment in low earth orbit
… will affect their contributions to orbital debris over the next 150 years. A new, medium-fidelity simulation for modeling orbital debris is developed and described, and several test cases are run with SpaceX’s Starlink megaconstellation and varying success rates for post-mission …
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Micrometeoroid Fluence Variation in Critical Orbits Due to Asteroid Disruption
<p>Micrometeoroids and orbital debris (MMOD) is a growing issue with international importance. Micrometeoroids are naturally occurring fragments of rock and dusk that exist throughout the solar system. Orbital debris is human made material like rocket bodies, paint flakes, and the effluent of …
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Numerical study of projectile shape effect on the bumper performance under hypervelocity impact
… small micrometeoroids and small non-trackable orbital debris are generally unavoidable and pose a threat to spacecraft due to the high collision speeds exceeding 7 km/s. The design of spacecraft protection against micrometeoroids and orbital debris (MMOD) is generally based on experiments and …
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Attitude Dynamics of Debris Resulting From Upper Stage Fragmentation in Low Earth Orbit
… of the attitude dynamics of pieces of space debris that could result from the fragmentation of a spent upper stage in low Earth orbit (LEO).</p> <p>Up to now only whole objects of axisymmetric shape have been studied with the purpose of estimating their tumbling rates in LEO. Three shapes …
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Kosmické smetí a jeho vliv na konstrukci družic
… v konštrukčnom prístupe zvanom „design for debris“. Práca sa v teoretickej časti venuje charakteristikám kozmického odpadu. Poznatky uvedené v tejto časti musia byt zohľadnené pri návrhu misie a konštrukcie satelitu. Praktická časť práce demonštruje prístup „design for debris“ na modelovej …
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STARE CubeSat Communications Testing, Simulation and Analysis
… of the space surveillance network (SSN) to track orbital debris and satellites, both active and inactive. STARE is a pathfinder mission that is expected to show that CubeSat assets can improve the accuracy of space debris ephemeris data and help national assets avoid conjunction. However, STARE …
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Design, Fabrication, and Testing of a Proprioceptive Electroadhesion Pad for Space Applications
… closed loop, for attachment to large pieces of orbital debris. Other envisaged purposes for the mechanism are sample collection and manipulation in free-fall and in-situ analysis of cohesive forces in regolith at small bodies, such as asteroids or comets. Electrostatic finite element analysis …
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Radiation Damage Analysis of the Swept Charge Device for the C1XS Instrument
… with the vacuum of space, micrometeoroids, orbital debris, and the thermal and radiation environment. The focus of this thesis is concerned with ensuring high energy resolution from the swept charge devices (SCDs), essentially a non-pixellated version of the charge coupled device (CCD), for …
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Space situational awareness CubeSat concept of operations
… of the space surveillance network (SSN) to track orbital debris, inactive and active satellites alike. With the current SSN assets aging and the need for SSA growing, it is important to explore new ways to ensure proper SSA is maintained to preserve space operations. The Space-based Telescope for …
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