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 29 for “"Wind measurements"”.
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Three-dimensional wind measurements and modeling using a bi-static Fabry-Perot interferometer system in Brazil
… interferometer (FPI) to measure neutral wind velocities and neutral temperatures using observations of the 630.0-nm emission caused by the dissociative recombination of O2+. The FPI systems can operate in two different modes: cardinal and common volume (CV). In cardinal mode, each FPI …
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Model predictive control for ascent load management of a reusable launch vehicle
During the boost phase of ascent, winds have a significant impact on a launch vehicle's angle of attack, and can induce large structural loads on the vehicle. Traditional methods for mitigating these loads involve measuring the winds prior to launch and designing trajectories to minimize the …
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Sensing Atmospheric Winds from Quadrotor Motion
Wind observations that are critical for understanding meteorological processes occurring inside of the Earth's atmospheric boundary layer (ABL) are sparse due to limitations of conventional atmospheric sensors. In this dissertation, dynamic systems and estimation theory are combined with …
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Mesospheric wind estimation with the Jicamarca MST radar
… con figuration used for mesospheric Doppler wind measurements as well as the data processing procedure used to obtain wind estimates from spectral data. The procedure was initially developed by Sheth et al. [2006] and improved by Smith [2014], but it still gave biased wind estimates when the …
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Design and Development of Distributed Lower Atmospheric Instrumentation Packages
… be used for high temporal and spatial resolution measurements of atmospheric parameters such as temperature, pressure, humidity, particulate counts, wind velocity and much more. This thesis presents the development of both airborne and ground based distributed atmospheric instrumentation suites. …
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Oceanic Rain Identification Using Multifractal Analysis Of Quikscat Sigma-0
… interferes with the measurement of sea surface wind speed and direction from the Sea Winds scatterometer and as a result wind measurements contain biases in rain regions. In past research at the Central Florida Remote Sensing Lab, it has been observed that rain has multi-fractal behavior. In …
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Origin, Maintenance and Fine-Scale Structure of 14-15 February 1992 Mesoscale Gravity Wave Observed During Storm-Fest
… ahead of the dry surge. Surface pressure and wind measurements suggest that the disturbance was a bore. The bore propagated into a region where wave-ducting was effective, allowing it to maintain its structure over a long distance.
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Innovative Applications of Laser Remote Sensing of Gases, Aerosols and Wind
… involving trace gases, aerosol particles and wind; which are key components of the Earth’s atmosphere. First, we present the demonstration of gas concentration measurements using a quantum cascade laser open path system with characteristics that make it promising for mobile and/or …
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A Wind and Rain Backscatter Model Derived from AMSR and SeaWinds Data
The SeaWinds scatterometers aboard the QuikSCAT and ADEOS II satellites were originally designed to measure wind vectors over the ocean by exploiting the relationship between wind-induced surface roughening and the normalized radar backscatter cross-section. Recently, an algorithm for …
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Midlatitude thermospheric wind and temperature: networked Fabry-Perot interferometer observations and radiative transfer modeling
… which estimates thermospheric line-of-sight wind and temperature from raw FPI data. This new algorithm has the advantage over previous work in that it provides accurate temperature estimates and uncertainties. We then present a novel regularization-based technique to estimate the …
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An experimental study of the atmospheric boundary layer modified by a change in surface roughness and surface temperature
Three-dimensional wind measurements and temperature measurements were obtained on a 250-foot meteorological tower located near the Atlantic Ocean at Wallops Island, Virginia. The type of flow measured approached the tower from the ocean resulting in a complex three-dimensional type of flow as it …
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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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Long-term Background Ozone and Carbon Monoxide Measurements on the Maltese Islands
Long-term measurements of ozone and carbon monoxide have been carried out on the Maltese islands. Particular importance has been given to the background station at Gordan lighthouse, Gozo. The evaluation of the data showed that monthly and yearly averages of background ozone mixing-ratios are …
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Seasonal and spatial structure of the gravity waves and vertical winds over the central USA derived from the NOAA Profiler Network data
… National Oceanic and Atmospheric Administration wind profiling radar network for the period 2002 2005 were used to investigate the effects of precipitation, topography and gravity waves on the measurements of winds by wind profilers, and to study the climatology and sources of atmospheric gravity …
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Observational studies of scatterometer ocean vector winds in the presence of dynamic air-sea interactions
<p>Ocean vector wind measurements produced by satellite scatterometers are used in many applications across many disciplines, from forcing ocean circulation models and improving weather forecasts, to aiding in rescue operations and helping marine management services, and even mapping energy …
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An Ocean Surface Wind Vector Model Function For A Spaceborne Microwave Radiometer And Its Application
Ocean surface wind vectors over the ocean present vital information for scientists and forecasters in their attempt to understand the Earth's global weather and climate. As the demand for global wind velocity information has increased, the number of satellite missions that carry wind-measuring …
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Experimental and Theoretical Developments in the Application of Lagrangian Coherent Structures to Geophysical Transport
… for estimating local Eulerian diagnostics from wind velocity data measured by a fixed-wing unmanned aircraft system (UAS) flying in circular arcs. Using a simulation environment, it is shown that the Eulerian diagnostic estimates from UAS measurements approximate the true local Eulerian …
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Annual and Interannual Variability in the Wind Field and the Hydrography Along the Seward Line in the Northern Gulf of Alaska
… interacting influences of local forcing such as winds, coastal freshwater discharge, eddies, fronts and remote forcing like El Niño-Southern Oscillation. Until now, the influence of winds on the system has been calculated using coarse resolution upwelling index data or spatially sparse buoy data. …
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