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 22 for “"radio interferometry"”.
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Precision selenodesy via radio interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1979.
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Accurate image reconstruction in radio interferometry
… thesis is concerned with accurate imaging from radio interferometry data and with subsequent analysis so as to determine source positions and fluxes in the radio sky. The thesis makes proposals and implementations of new algorithms, which substantially improve the accuracy of image products and …
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Atmospheric propagation effects on radio interferometry
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1986.
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Probabilistic methods for radio interferometry data analysis
… method to the analysis of visibility data from radio interferometers. Any radio interferometry observation can be described using the Radio Interferometry Measurement Equation (RIME). Throughout the thesis, we use the RIME to model the visibilities in performing the probabilistic analysis. We …
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Radio Frequency Interference: Simulations for Radio Interferometry Arrays
Radio Frequency Interference (RFI) is a massive problem for radio observatories around the world. Due to the growth of telecommunications and air travel RFI is increasing exactly when the world's radio telescopes are increasing significantly in sensitivity, making RFI one of the most pressing …
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Testing general relativity using millimeter wavelength radio interferometry of Sgr A*
General relativity, though widely accepted in the weak-field limit, is difficult to test in the strong-field regime. Millimeter wavelength VLBI offers a unique opportunity to resolve the black hole structure on event-horizon scales. The ability of millimeter wavelength VLBI observations of Sgr A* …
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The precision and accuracy of intercontinental distance determinations using radio interferometry
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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A Monte Carlo tool for simulation of satellite orbit determination by radio interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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GPU-based acceleration of radio interferometry point source visibility simulations in the MeqTrees framework
Modern radio interferometer arrays are powerful tools for obtaining high resolution images of low frequency electromagnetic radiation signals in deep space. While single dish radio telescopes convert the electromagnetic radiation directly into an image of the sky (or sky intensity map), …
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21 cm cosmology with optimized instrumentation and algorithms
… of the MIT Epoch of Reionization (MITEoR) radio telescope, an interferometric array of 64-dual polarization antennas whose goal was to test technology and algorithms for incorporation into the Hydrogen Epoch of Reionization Array (HERA). In four papers, I develop, test and improve many …
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Characterizing sub-mm observations of protoplanetary disks at super-resolution scales
… eras can be used to inform study in the others. Interferometry affords the highest angular resolution of any observing technique in astronomy, and the use of radio interferometry with instruments such as the Atacama Large Millimeter Array (ALMA) and the Karl G. Jansky Very Large Array (VLA) is …
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Synthesis Imaging with Vector Sensor Arrays
Radio astronomy observations at frequencies below 10 MHz could provide valuable science, such as measuring the cosmic dark age signal in the redshifted 21-cm hydrogen absorption line, detecting exoplanetary auroral emissions which lead to inferences about magnetic fields and atmospheres, and …
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The relation between atomic and molecular gas: the Magellanic Clouds and beyond
… techniques, ultraviolet spectroscopy and radio interferometry imaging, to study the atomic and molecular gas relation in the Large/Small Magellanic Clouds and 43 nearby galaxies. These galaxies demonstrate various galactic environments compared with the Milky Way and provide an ideal …
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Bayesian model selection with applications to radio astronomy
… In the second part of this thesis, the Bayesian radio interferometry formalism of Lochner et al. (2015) is extended to take into account the gains of the antennae using the StEFCal algorithm, an important part of the calibration pipeline. Finally we study the case of a pair of sources and show …
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New applications of statistics in astronomy and cosmology
… then apply Bayesian statistics to the field of radio interferometry. This is particularly relevant in light of the SKA telescope, where the data will be of such high quantity and quality that current techniques will not be adequate to fully exploit it. We show that the current approach to …
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The design of a two-element radio interferometer using satellite TV equipment
… research presents the design of a two-element radio interferometer capable of performing complex correlation. With the development of sophisticated radio astronomy instruments, particularly in South Africa, there is a need to develop an affordable educational instrument which can be used to …
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Robust Statistical Radio Interferometric Methods for the Detection of the Epoch of Reionization
… are needed to minimize this foreground leakage. Radio astronomy is synonymous with big data: large data volumes need to be reduced, much of which is corrupted by radio-frequency interference, systematics and other non-thermal effects. Traditional outlier rejection algorithms are ad-hoc, often …
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Characterization and Mitigation of Terrestrial and Astrophysical Foreground Effects in 21cm Cosmology
… the characterization and mitigation of VHF-band radio frequency interference (RFI), and the last two being devoted to the characterization and mitigation of astrophysical foregrounds in radio interferometers, in the presence of mutual coupling between array elements. First, The SDR Pathfinder for …
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Toward detection and characterization of exoplanetary magnetic fields via low frequency radio observation
Low frequency radio emission from planets is produced by the interaction of energetic charged particles from the planet's ionosphere and/or the solar wind with the planet's magnetic field. The temporal and spectral characteristics and variability of planetary radio emission encode information about …
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A Pathway to EMU: the SCORPIO Project
We are entering a golden age for radio astronomy. There are several new interferometers upcoming, whose characteristics, in terms of sensitivity, frequency coverage, angular and temporal resolution, field of view, will permit unprecedented deep observations. The most outstanding ones among them …
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