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 15 of 15 for “"wind model"”.
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Validation Of Integrated Coast-Ocean Model Cche2D-Coast And Development Of Wind Model
… of tropical cyclones vary mainly depending on wind intensity and geological features of the coast that it is crossing. Higher winds potentially generate higher storm surges and consequently larger floods occur along the coastlines. Therefore, it is critical to accurately predict winds, storm …
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Robust planning for autonomous parafoil
… of an uncertain and potentially highly dynamic wind environment. This thesis develops a novel planning approach to parafoil terminal guidance. Building on the chance-constrained rapidly exploring random tree (CC-RRT) [1] algorithm, this planner, CC-RRT with Analytic Sampling, considers the …
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Validación y estudio comparativo de metodología CFD aplicada a emplazamientos eólicos reales
… ha realizado la validación y comparación de un modelo de viento CFDWind desarrollado por el Centro Nacional de Energías Renovables y basado en metodología CFD que permite resolver el comportamiento del viento en el interior de la capa límite atmosférica, adaptando su uso a la caracterización del …
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Development of a feedback controller for the Antenna Positioner on the MeerKAT Radio Telescope
… project presents a comprehensive approach to the modelling and design of a feedback control system for a MeerKAT antenna. The project first focuses on modelling of the antenna's mechanical dynamics in its two axes of motion: azimuth and elevation. The modelling approach derives a linear lumped …
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Incoherent Scatter Radar Observations of Dynamic Ion Composition Changes at High Latitudes during Geomagnetic Storms
… ambiguities by self-consistently modeling ion temperature profiles as a function of electric fields and plasma interactions with the neutral atmosphere. These two new methods improve on previous, similar work developed in Zettergren et al. [2010,2011] by incorporating more accurate …
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Fabry-Perot Observations of Midlatitude Neutral Winds and Atmospheric Gravity Wave Activity
… 96 km. The process of extracting the horizontal winds from the detected Doppler shifts and the resulting time series of the zonal and meridional winds at that altitude is presented. The winds at various nights as well as the average winds for two months were compared with the Horizontal Wind …
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Observations of the thermosphere using measurements from long-term Fabry-Perot interferometers
… to the plentiful plasma datasets. Neutral wind and temperature data are needed to understand and validate the physics of the upper atmosphere. As satellites do not provide high-resolution temporal coverage over a given region, stationary ground-based systems are needed to observe the …
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Hurricane-generated ocean wave propagation and impacts on a fringing reef in Hawai’i
… Lane, successive offshore storms, had strong winds that generated large waves and impacted the islands in the summer of 2018. This study aims to investigate the ocean surface wave response to hurricane wind forcing across the ocean at a large scale and to understand the finer-scale processes …
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Investigation of Radar Interferometric Techniques With Application to the Atmosphere
… radar data collected at Jicamarca are studied to model the spectral and cross-spectral signatures of lower mesospheric returns. The aspect sensitivity of radar echoes and the horizontal, vertical, and random components of atmospheric fluid velocity are estimated using the spectral model developed …
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Modelling the balmer line profiles in the spectra of symbiotic stars
… stars however, is much more uncertain and modelling the lines on this basis could, if successful, help to strengthen the evidence for their presence in symbiotic systems. This is the main motivation for the work described in this thesis, which is a direct offshoot of the Manchester …
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Tidal analysis of modeled thermospheric winds to improve agreement with measurements over South Africa
Made available in DSpace on 2019-08-23T19:51:48Z (GMT). No. of bitstreams: 4 CHU-THESIS-2019.pdf: 4866560 bytes, checksum: 017305d631eda57a27d64bc0c65b2b55 (MD5) LICENSE.txt: 4209 bytes, checksum: de0418cfda74c8bb803da2fe0b0b3c9c (MD5) RightsLink Printable License Elsevier.pdf: 199071 bytes, …
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Analytic chance constraints for the robust guidance of autonomous parafoils
… in the presence of uncertain atmospheric wind disturbances. This thesis presents two online trajectory planning algorithms for autonomous parafoil guidance in complex terrain and wind environments. These -algorithms are capable of operating from arbitrary initial conditions, including …
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Coastal climate change and variability in the Benguela current system
… trend in upwelling-favourable equatorward winds due to the intensification and poleward expansion of the South Atlantic Subtropical high-pressure atmospheric system. A warming trend is observed in Southern Angola and Northern Benguela in late spring and summer. Results also show that the …
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A Field-Wise Retrieval Algorithm for SeaWinds
… of 1999 NASA will launch the scatterometer SeaWinds, beginning a 3 year mission to measure the ocean winds. SeaWinds is different from previous spaceborne scatterometers in that it employs a rotating pencil-beam antenna as opposed to fixed fan-beam antennas. The scanning beam provides greater …