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 29 for “"weather radar"”.
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Probable maximum flooding using quantitative weather radar
… the UK in the past 15 years and were observed by radar. Storm efficiencies have been determined in a Lagrangian frame of reference for these events and used as input into a storm model to determine the corresponding PMP. Results show that while the peak rainfall rates are somewhat less with the …
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Weather Radar image Based Forecasting using Joint Series Prediction
<p>Accurate rainfall forecasting using weather radar imagery has always been a crucial and predominant task in the field of meteorology [1], [2], [3] and [4]. Competitive Radial Basis Function Neural Networks (CRBFNN) [5] is one of the methods used for weather radar image based forecasting. …
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Dynamic model for space-time weather radar observation and nowcasting
… framework of the dynamic model for space-time radar observations has been developed in the current research. There exist three difficulties in modeling spacetime radar observations: 1) high dimensionality due to the high-resolution radar measurements over a large area, 2) non-stationarity due …
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Intelligent algorithms applied to weather radar based flood forecasting system
The UK weather radar network and telemetry system for the raingauges and river level gauges provided the solid physical base which produce the large amount of data in real time and a large variety of operational flood forecasting models were supplied from SW Region of the Environment Agency. Data …
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Fast Algorithm for Modeling of Rain Events in Weather Radar Imagery
Weather radar imagery is important for several remote sensing applications including tracking of storm fronts and radar echo classification. In particular, tracking of precipitation events is useful for both forecasting and classification of rain/non-rain events since non-rain events usually appear …
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Electronic scan weather radar: scan strategy and signal processing for volume targets
… searching for options for the next generation of weather radar technology. With its superior capability for rapidly scanning the atmosphere, electronically scanned phased array radar (PAR) is a potential candidate. A network of such radars has been recommended for consideration by the National …
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Feasibility of Spectrum Sharing Between Airborne Weather Radar and Wireless Local Area Networks
… feasibility of spectrum sharing between airborne weather radar and wireless local area networks at 9.3 GHz – 9.5 GHz. Characteristics of flight paths of aircraft using airborne weather radar and the low duty cycle of radar transmissions offer unique opportunities for spectrum sharing. But it was …
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Optoelectronic Multifractal Wavelet Analysis for Fast and Accurate Detection of Rainfall in Weather Radar Images
… removal of non-precipitation echoes present in weather radar signals and accurate detection of rainfall. The process employs multifractal analysis using directional Gabor wavelets for accurate detection of the rain events. An optoelectronic joint transform correlator is proposed to provide ultra …
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Real-time flood forecasting model intercomparison and parameter updating rain gauge and weather radar data
… in the three countries, using rain gauge and radar derived rainfall estimates and time-series analysis. An extended inter-comparison of real-time flood forecasting models has been carried out and an attempt has been made to rank the flood forecasting models. It was found that an increase in …
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The development and validation of an X-band dual polarization Doppler weather radar test node for a tropical network
… of three X-band dual polarization Doppler weather radars is in process of being deployed and operational on the western coast of Puerto Rico. Colorado State University and the University of Puerto Rico at Mayaguez have collaborated to install the first polarimetric weather radar network in …
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Aircraft charging using ion emission for lightning strike mitigation : an experimental study
… avoiding thunderstorm regions, as recommended by weather radar or conversations between pilots and the ground. Methods to treat the symptom of a strike have been relatively successful; a mesh placed under the skin of the aircraft can distribute the current and heat of the localized strike. …
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Nuevas técnicas para la mitigación de clutter de aerogeneradores en radares meteorológicos
… de comunicaciones y también en sistemas de radar. En particular, esto es un grave problema para los radares meteorológicos. En su caso, los aerogeneradores eólicos son vistos como clutter, dado que tienen una fuerte influencia en los productos meteorológicos tales como la estimación de la …
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Three-Dimensional Distance Based Geostatistical Models to Adjust Radar Rainfall Data
… modeling studies. Rain gauge collection and weather radar rainfall estimate are two of the most common techniques used for receiving rainfall data at a watershed. This study focuses on the development of three-dimensional (3D) distances based geostatistical models, such as Regression Kriging …
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Cross-validation of spaceborne radar and ground polarimetric radar observations
There is great potential for spaceborne weather radar to make significant observations of the precipitating medium on global scales. Unlike other instruments, such as light detecting and ranging (lidar) systems that operate in the optical region, and thermatic mapping systems that use short …
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Tropical cyclone precipitation risk in the Southern United States
… estimates from the WSR-88D Next Generation Weather Radar (NEXRAD-II) system. In general the synthetic TCP estimates show good agreement with radar-based observations. The rainfall algorithm appears to perform better at coastal locations versus inland ones, and in general has better agreement …
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The dual-polarization radar signature of a wind turbine: characterization and suppression
… can represent large, dynamic targets for radar systems. Their echoes can inhibit normal radar operations for observation volumes in and beyond the ranges occupied by the turbines. As a result of this interference, also referred to as "wind turbine clutter," the construction and location of …
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Mechanical and Electromagnetic Optimization of Structurally Embedded Waveguide Antennas
… skin panel using a multi-fidelity model. Weather detection radar for the Northrop Grumman X-47 unmanned air system is considered as a case study. COMSOL Multiphysics is used for creating high-fidelity waveguide models that are imported into the MATLAB Phased Array Toolbox for large-scale …
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Printed log-periodic feeds for radar applications
Radar systems are well known since the end of world war II and are widespread. The basic concept of radar is relatively simple: the system uses the propagation characteristics of electromagnetic waves and works by radiating electromagnetic energy in the space and detecting the echo reflected by the …
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Analysis of precipitation and convection in the west Pacific during the PISTON field campaign
… 2019. On board the PISTON ships was the SEA-POL weather radar, the first polarimetric weather radar designed specifically for deployment at sea. In addition to taking traditional radar measurements of precipitation intensity and velocity, SEA-POL's polarimetric measurements also provide insights …
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Leveraging Temporal Dynamics to Enhance Radar-Based Object Detection in Adverse Weather for Autonomous Vehicles
… significant performance degradation in adverse weather. Radar sensors, with their inherent resilience to lighting variations and weather changes, present a strong alternative for robust perception. However, their effective use is challenged by higher noise, environmental clutter, and a wider …
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