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 9 of 9 for “"aeronomy"”.
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Acoustic/Gravity Wave Phenomena in Wide-Field Imaging: From Data Analysis to a Modeling Framework for Observability in the Mlt Region and Beyond
… characterization are fundamental challenges in Aeronomy that require a wide range of instrumentation with distinct operational principles. Most measurements share the common features of integrating optical emissions or effects on radio waves through deep layers of the atmosphere. The geometry of …
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Plasma line generation and spectral estimation from Arecibo Observatory radar data
… radio astronomy, planetary radar and terrestrial aeronomy [Altschuler, 2002]. Although ISR measurements have been routinely taken at Arecibo since the early 1960s, full spectrum ISR measurements including the high-frequency plasma-line components became possible only very recently [Vierinen et …
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Understanding Uncertainties for Polar Mesospheric Cloud Retrievals and Initial Gravity Wave Observations in the Stratopause from the Cloud Imaging and Particle Size Instrument
… and Particle Size (CIPS) instrument on the Aeronomy of Ice in the Mesosphere satellite images in the nadir at the UV wavelength of 265 nm. The camera array has an approximately 120° along track (2000 km) by 80° cross track (1000 km) field of view at a horizontal resolution of 1 by 2 km in …
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Quantification of the spatial structure and temporal variability of Earth's exosphere using optical tomography
… is crucial for 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 …
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Parameter estimation in imaging Fabry-Perot Doppler spectroscopy
Fabry-Perot spectroscopy has been used for many decades to observe optical phenomena in the Earth's upper atmosphere. The techniques have been evolving in recent years, with the major technical advancement being use of a CCD in the focal plane of the instrument. This dissertation rigorously …
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Understanding Middle Atmospheric Composition Variability from the Solar Occultation for Ice Experiment Instrument and Other Datasets
… (SOFIE) is one of the two instruments on the Aeronomy of Ice in the Mesosphere (AIM) spacecraft. The studies presented in this dissertation primarily focus on the use of SOFIE observations combined with results from other science missions, an atmospheric model, and other datasets. Chapter I is …
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Midlatitude thermospheric wind and temperature: networked Fabry-Perot interferometer observations and radiative transfer modeling
This dissertation presents studies of the midlatitude and low-latitude thermosphere, primarily using networks of Fabry-Perot interferometers (FPIs). First, we describe an algorithm which estimates thermospheric line-of-sight wind and temperature from raw FPI data. This new algorithm has the …
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Contribution of the First Electronically Excited State of Molecular Nitrogen to Thermospheric Nitric Oxide
The chemical reaction of the first excited electronic state of molecular nitrogen, N₂(A), with ground state atomic oxygen is an important contributor to thermospheric nitric oxide (NO). The importance is assessed by including this reaction in a one-dimensional photochemical model. The method is to …