Browsing OU - Theses by Author "Palmer, Robert"
Now showing items 1-17 of 17
-
Assessing scanning strategies with all-digital phased array weather radars for characterization and detection of microbursts
Pearson, Connor (2022-05-13)Microbursts are a rapidly evolving, vertically oriented meteorological phenomena that can be extremely hazardous to aviation, and other human activities, if left undetected. The temporal resolution and vertical sampling ... -
The Bootstrap Dual Polarimetric Spectral Density Estimator
Umeyama Matsumoto, Arturo Yoshiyuki (2016-08)Weather radar moments and polarimetric variables provide useful information about the characteristics and motion of hydrometeors. However, the bulk information may be masked when the meteorological signal of interest is ... -
Bridging the NASA Global Precipitation Measurement and Soil Moisture Active Passive Missions: Variability of Microwave Surface Emissivity from both In-situ and Remote Sensing Perspectives
Zheng, Yaoyao (2016-08-12)The overland precipitation retrievals from satellite passive microwave (PMW) radiometer such as the Global Precipitation Mission (GPM) microwave imager (GMI) suffer from the contamination of observed brightness temperatures ... -
Digital radar receiver design based on highly efficient bandpass sampling FPGA architecture
Meier, John (2009)As digital electronics become faster and more efficient, it becomes possible to move the analog/digital interface in a radar downconversion system further towards the antenna. Instead of digitizing radar echoes at the end ... -
The Effects of Terrain on an Idealized Tornado using a Large-Eddy Simulation
Satrio, Martin (2019-08-01)Tornado structure is known to be sensitive to the characteristics of near-surface inflow, which in turn is affected by inhomogeneities in surface features. Many observational studies such as VORTEX-SE have identified ... -
Examining Meteorological Benefits of Rapid-Scan, Dual-Polarization, All-Digital Phased Array Radar Observations for Detecting Tornado Formation and Intensification
Cohen, Brandon (2022-08-04)Phased array radar (PAR) is widely considered the future for a replacement to the current operational radar network, NEXRAD. In particular, an all-digital operational PAR network offers a range of benefits including adaptive ... -
EXPERIMENTS ON ELECTROMAGNETIC LEAKAGE FROM LAPTOP COMPUTERS
Borowska, Lesya (2017-05-12)The possibility of an electromagnetic (EM) side channel attack on computers has been known since 1967. Each executed instruction/event from running a program on a computer/laptop causes an EM signal at particular frequency. ... -
Exploring Tornado Debris Signature Hypotheses Using Radar Simulations and Large-Eddy Simulations
Cross, Rachael (2021)Tornadoes can loft various types and sizes of debris, sometimes resulting in a polarimetric radar signature called the TDS (Tornado Debris Signature). The presence of a TDS in the radar data can help confirm the occurrence ... -
Fast Adaptive Digital Beamforming With Machine Learning
Kim, Yoon-SL (2022-12-16)Digital polarimetric Phased Array Radar (PAR) has the potential to achieve high temporal and spatial resolution needed for next-generation weather observations. It offers flexibility in scanning strategies, including the ... -
Meteorological Benefits of Dual-Polarization, Rapid-Scanning Radar Systems on Hail Producing Storms
Shedd, Laura (2022-08-04)Hailstorms continue to be one of the leading economic natural hazards in the United States, amounting to ten billion dollars in damage, on average, annually. Radar tech- nology is one of the best means of detecting hailstorms, ... -
Methods for Control, Calibration, and Performance Optimization of Phased Array Systems
Herndon, Matthew (2022-05-13)Phased array radar systems have proven advantageous in a variety of research applications, offering faster volume scans and unparalleled time-resolution as compared to traditional parabolic dish antenna systems that rely ... -
Multi-Radar Analysis of the 20 May 2013 Moore, Oklahoma Supercell through Tornadogenesis and Intensification
Satrio, Clarice (2019-12-13)On 20 May 2013, a violent, long-track EF-5 tornado impacted Moore, Oklahoma and surrounding areas, occurring within a network of radars operating in close proximity to the supercell. This network of radars consisted of ... -
Observations and Simulations of a Multistatic Weather Radar Network
Emmerson, Samuel (2022-05)Multistatic radar architectures have the potential to provide a cost-effective source of 3D wind information from both operational and research radars, owing to a system design of one transmitter and several receivers. A ... -
Quantifying and Mitigating Debris-Induced Bias in Radar Measurements of Tornadic Winds
Schneider, Morgan (2021)The centrifuging of lofted tornadic debris is known to cause bias in Doppler radar measurements of tornado wind speeds. Debris presence in a radar volume is associated with anomalous radial divergence, underestimation of ... -
Radar Cross Section Analysis of Tornadic Debris
Lujan, Javier (2016-12-16)Weather radar is a powerful tool for detecting hazardous weather that may impact citizens. Among these dangerous weather phenomena, tornadoes have a high potential for destruction of property and loss of life due to its ... -
Simulation of Polarimetric Phased Array Weather Radars
Byrd, Andrew (2016-05)Polarimetric phased array radars (PPARs) are a rapidly developing area of research interest in weather radar. However, they present intrinsic challenges for calibration and operation. Foremost among these are the adverse ... -
Spatially-Temporally Resolved Sampling System for Carbon Dioxide Concentration in The Atmospheric Boundary Layer: A Low-Cost UAS Approach
Britto Hupsel de Azevedo, Gustavo (2020-05-08)Given the consensus around the importance of atmospheric carbon dioxide (CO2) to human life on earth, its monitoring has grown significantly in the past 60 years. However, there is still a knowledge gap regarding the ...