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 8 of 8 for “"heliophysics"”.
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Small-Body and Heliophysics Missions using Hybrid Low-Thrust Propulsion
… study, trajectories are generated to potential heliophysics and smallbody targets: high-inclination, heliocentric orbits and interstellar objects (ISOs). For the former, detailed mass budgets are created and a trade study of subsystem size versus mass is conducted to identify the performance …
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Hard X-ray diagnostics of particle acceleration and energy release in solar flares and coronal jets
… space environment is a fundamental problem of heliophysics research. This dissertation investigates two forms of solar activity capable of accelerating particles to high energies—solar flares and coronal jets, both of which are driven by magnetic reconnection. Hard X-ray (HXR) emissions, …
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Quantification of the spatial structure and temporal variability of Earth's exosphere using optical tomography
… understanding various aspects of aeronomy and heliophysics, such as atmospheric chemistry and energetics, magnetospheric energy dissipation, ion-neutral coupling, and atmospheric evolution. Atomic hydrogen (H) is the dominant constituent in this region, where it forms a mostly gravitationally …
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Remote sensing of ion-neutral charge exchange and diffusive transport in planetary atmospheres
… rate. This thesis advances the fields of heliophysics and planetary science by developing a suite of new techniques to estimate the density distributions of H and O and by quantifying their charge-exchange interactions with H+ and O+ in the coupled planetary regions of the mesosphere, …
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The solar tachocline: a self-consistent model of magnetic confinement
In this dissertation we consider the dynamics of the solar interior, with particular focus on angular momentum balance and magnetic field confinement within the tachocline. In Part I we review current knowledge of the Sun's rotation. We summarise the main mechanisms by which angular momentum is …
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Forecasting and Modelling Space Weather with Deep Learning Methods
With the ever increasing number of spacecraft providing essential services for society, the accurate modeling and forecasting of conditions for these spacecraft becomes increasingly important. The conditions that these spacecraft operate in is often referred to as space weather. The advent of deep …
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Information Theory Analysis of the Solar Wind Magnetic Structures for Space Weather Prediction
<p>Forecasting space weather at Earth is highly complicated, because of the limited measurements of the dynamic processes in the Sun that span multiple temporal, spatial, and energy-scales. The solar wind is a highly structured, multi-scale, evolving plasma and consists of coronal mass ejections …