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.
Results
Showing 1 to 20 of 73 for “"Thermosphere"”.
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Density variations in the lower thermosphere.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1974.
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The diurnal circulation of the thermosphere,
Thesis (Ph D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1970.
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A radar study of the thermosphere
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1975.
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Non-migrating tides in the Martian thermosphere
Previous studies have identified longitudinal structures associated with non-migrating tides in observations of the upper neutral atmosphere of Mars. MAVEN’s Imaging Ultraviolet Spectrometer (IUVS) observations of the upper atmosphere reveal variations in density with longitude at altitudes of 130 …
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A study of energy sources for the thermosphere.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1966. Ph.D.
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Seasonal wind variations in the mid-latitude neutral thermosphere.
Thesis. 1977. Sc.D.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Observations of Non-Migrating Tides in the Middle Thermosphere
… characterized in the mesosphere/lower thermosphere and the upper thermosphere, yet it is not quite known to what extent tides appear in the middle thermosphere due to a lack of global-scale systematic observations. This dissertation addresses the middle thermospheric "gap" of tidal …
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A simple numerical model of the dynamics of the thermosphere
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1967. M.S.
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Satellite Drag and Sustainable Space Operations in a Dynamic Thermosphere
… variability in the composition of Earth’s thermosphere. Rising concentrations of carbon dioxide and other greenhouse gases have caused warming in the troposphere but cooling and contraction in the upper atmosphere. This contraction decreases atmospheric density in LEO, reducing drag and …
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The dependence of the circulation of the thermosphere on solar activity
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Simulating Nitric Oxide in the lower thermosphere using a 3D model
… to obtain an accurate representation of the thermosphere. The NCAR Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM) is a three dimensional first principles based model which includes a self consistent aeronomic scheme that solves for winds, temperatures and densities …
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Observations of the thermosphere using measurements from long-term Fabry-Perot interferometers
… neutral region of the atmosphere, known as the thermosphere, and only through knowledge of the state parameters of both regions can accurate predictions of ionospheric phenomena be made during both quiet conditions and geomagnetic storms. As a compounding factor, thermospheric data have been …
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Planar Ion Probe for Low-Latitude Ionosphere/Thermosphere Enhancements in Density Cubesat Mission
<p>One of the crucial measurements for characterizing any space weather event is absolute plasma density and plasma density fluctuations, both spatially and temporally. Langmuir probes are the oldest and most proven instruments for these in-situ measurements. This thesis enumerates the development …
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A one-dimensional model for odd nitrogen in the stratosphere, mesosphere, and thermosphere.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Long-range Propagation, Interaction, and Dissipation of Small-Scale Gravity Waves in the Mesosphere and Lower Thermosphere
… gravity waves in the Mesosphere and Lower Thermosphere (MLT) region. The research in this thesis is made up of three distinct studies which build upon each other. The first investigates the thermospheric dissipation of three gravity wave packets representing: (1) A quasi-monochromatic …
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Dynamical Processes of Gravity Waves Propagation and Dissipation, and Statistical Characteristics of Their Momentum Flux in the Mesosphere and Lower Thermosphere
<p>The mesosphere and lower thermosphere (MLT) (⇠80–110 km) is dominated by abundant atmospheric waves, of which gravity waves are one of the least understood due to large varieties in wave characteristics as well as potential sources. Gravity waves play an important role in the atmosphere by …
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Planning and Simulating Observations for a Sounding Rocket Experiment to Measure Polar Night Nitric Oxide in the Lower Thermosphere by Stellar Occultation
The objective of this thesis was to select a star for observation and determine the error in the retrieval technique for a rocket experiment to measure lower thermospheric Nitric Oxide in the polar night using stellar occultation technique. These objectives are accomplished by planning the …
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Saturn’s Upper Atmosphere in the Ultraviolet: Temperature and Compositional Trends from Cassini UVIS with Implications for Energy Balance and Dynamics
… has produced the first 2D temperature map of the thermosphere with latitude and pressure, which reveals a temperature distribution that differs in important ways from model predictions. The Saturn Thermosphere Ionosphere Model (STIM) predicted that temperatures would peak around 630 K near 10^-8 …
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