Browsing by Subject "Radar"
Now showing items 21-38 of 38
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LOW-COST, SOFTWARE DEFINED FMCW RADAR FOR OBSERVATIONS OF DRONES
(2017-05-12)This thesis focuses on implementing a small, low-cost, Frequency-Modulated-Continuous-Wave (FMCW) radar sensor using Software-Defined Radio (SDR) platforms. Extensive investigation and comparisons of existing SDRs are ... -
Methods for Control, Calibration, and Performance Optimization of Phased Array Systems
(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
(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 ... -
Multistatic Passive Weather Radar
(2020-05-08)Practical and accurate estimation of three-dimensional wind fields is an ongoing challenge in radar meteorology. Multistatic (single transmitter / multiple receivers) radar architectures offer a cost effective solution for ... -
A NEW RESEARCH METHOD TO EVALUATE THE IMPACT OF WET RADOMES ON DUAL-POLARIZED WEATHER RADARS AND COMMUNICATION SYSTEMS
(2018-12-14)The purpose of this dissertation is to provide a detailed study of the effect of water accumulated on wet radomes. To accomplish this goal, a novel method to evaluate the impact of wet radomes on dual-polarized weather ... -
Nonlinear Amplifier Amplitude Modulation Distortion Mitigation Techniques
(2022-05-13)High peak-to-average power ratio (PAPR) waveforms present a challenge to radar systems in which high power amplifiers operate in saturation to increase power efficiency. Previous works have demonstrated a marked reduction ... -
Nonlinear Equalization and Digital Pre-Distortion Techniques for Future Radar and Communications Digital Array Systems
(2020-05-08)Modern radar (military, automotive, weather, etc.) and communication systems seek to leverage the spatio-spectral efficiency of phased arrays. Specifically, there is an increasingly large demand for fully-digital arrays, ... -
OBSERVATIONAL STUDY OF RAIN MICROPHYSICS AND RAIN RETRIEVAL USING POLARIMETRIC RADAR DATA
(2009)Accurate quantitative precipitation estimation (QPE) and quantitative precipitation forecasts (QPF) require accurate microphysical parameterization/modeling of the precipitation. This study presents the modeling of rain ... -
Quantifying and Mitigating Debris-Induced Bias in Radar Measurements of Tornadic Winds
(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 POLARIMETRY FOR BIOLOGICAL APPLICATIONS
(2015-05-08)Radar aeroecology has steadily progressed since its inception in the 1950's, and additional advancements in radar technology, networks, modeling, and validation continue to drive the science further. As human impacts ... -
Simulation and Adaptive Aperture Allocation for All-Digital Phased-Array Radar
(2019-08-01)Increased flexibility afforded by all-digital radar architectures and operational concepts such as MIMO radar can be leveraged with new waveforms and aperture allocation methods to improve radar performance in diverse ... -
STATE AND PARAMETER ESTIMATION USING POLARIMETRIC RADAR DATA AND AN ENSEMBLE KALMAN FILTER
(2008)The US National Weather Service plans to upgrade the entire operational radar network to polarimetric capability early in the next decade. The goal of this dissertation is to develop methodologies that use polarimetric ... -
A Study Of The Electrical, Microphysical, And Kinematic Properties Of The 29 May 2012 Kingfisher Supercell Undergraduate
(2014)A supercell thunderstorm formed as part of a cluster of severe storms near Kingfisher, OK on 29 May 2012 during the Deep Convective Clouds & Chemistry (DC3) experiment. This storm produced 5” hail, an EF-1 tornado, and ... -
A Study Of The Electrical, Microphysical, And Kinematic Properties Of The 29 May 2012 Kingfisher Supercell
(2014)A supercell thunderstorm formed as part of a cluster of severe storms near Kingfisher, OK on 29 May 2012 during the Deep Convective Clouds & Chemistry (DC3) experiment. This storm produced 5” hail, an EF-1 tornado, and ... -
TECHNIQUES AND INSTRUMENTATION FOR PHASED ARRAY CALIBRATION
(2020-05-08)Active phased arrays suffer the inherent problem of excitation errors, i.e., incorrect phase and amplitude excitation of the antenna elements. Excitation errors degrade critical performance parameters since they increase ... -
UAV-Based In Situ Antenna Characterization: Analysis and Design Requirements
(2018-05-11)This thesis proposes to characterize antennas in situ with Unmanned Aerial Vehicles (UAVs), especially within the framework of weather radar and 5th generation wireless systems (5G) antennas. Specifically, it is concerned ... -
The Use of Polarimetric Radar Data for Informing Numerical Weather Prediction Models
(2018-05-11)The explicit prediction of convective storms using storm-scale models has recently become a reality. Radar data is a crucial source of information about the microphysical and kinematic properties of convection at the ... -
WAVEFORM AND TRANSCEIVER OPTIMIZATION FOR MULTI-FUNCTIONAL AIRBORNE RADAR THROUGH ADAPTIVE PROCESSING
(2013)Pulse compression techniques have been widely used for target detection and remote sensing. The primary concern for pulse compression is the sidelobe interference. Waveform design is an important method to improve the ...