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 25 for “"rain-rate"”.
-
Hurricane Wind Speed And Rain Rate Retrieval Algorithm For The Stepped Frequency Microwave Radiometer
… measurement of oceanic surface wind speed and rain rate in hurricanes. The HIRA is designed to process airborne microwave brightness temperatures from the NOAA, Stepped Frequency Microwave Radiometer (SFMR), which routinely collects data during NOAA hurricane hunter aircraft flights. SFMR …
-
A Wind and Rain Backscatter Model Derived from AMSR and SeaWinds Data
… algorithm for simultaneously retrieving wind and rain (SWR) from scatterometer measurements was developed that enables SeaWinds to correct rain-corrupted wind measurements and retrieve rain rate data. This algorithm is based on co-locating Tropical Rainfall Measuring Mission Precipitation Radar …
-
Fine-scale modelling of rain fields for radio network simulation
… microwave frequencies are strongly scattered by rain. Rain fade is the mechanism that limits the performance of terrestrial microwave telecommunication systems. To predict the Quality of Service (QoS) at a node in heterogeneous networks of line-of-sight, terrestrial, microwave links; requires …
-
Cross-validation of spaceborne radar and ground polarimetric radar observations
… detecting and ranging (lidar) systems that operate in the optical region, and thermatic mapping systems that use short wavelengths in the infrared, etc., radar has the ability to penetrate the cloud and rain layer to make observations of the vertical profile of the rain field. Though the …
-
Global estimation of precipitation using opaque microwave bands
… bands for global estimation of precipitation rate. An algorithm was developed for estimating instantaneous precipitation rate for the Advanced Microwave Sounding Unit (AMSU) on the NOAA-15, NOAA-16, and NOAA-17 satellites, and the Advanced Microwave Sounding Unit and Humidity Sounder for …
-
Preliminary processing and evaluation of radar measurements in satellite-path propagation research
Rain and other precipitation cause attenuation and depolarization of high frequency satellite signals. Some characteristics of rain can be measured by dual-polarized radar. These characteristics can then be used to predict the effects of the rain on satellite-path propagation. This thesis describes …
-
Modelling of Rainfall Drop Size Distributions for Application in Fade Prediction on Earth-Space Paths
… required multi-gigabit per second downlink bit rate capacity. However, at Ka-band the downlink becomes highly susceptible to disruption by rain during each satellite pass when path elevation angles will range anywhere between 90 degrees and 20 degrees or less. The resulting rain attenuation will …
-
Analysis of precipitation and convection in the west Pacific during the PISTON field campaign
… large portion (56%) of the total rain volume. Conversely, small isolated features were present in 91% of scans, yet these features contributed just 11% of the total rain volume, with the bulk of the rainfall owing to warm rain production. Convective rain rates and 30-dBZ echo-top …
-
Radar multi-sensor (RAMS) quantitative precipitation estimation (QPE)
… encourages its application in the pursuit of accurate rainfall estimation, where radar reflectivity-rainfall (Z-R) relations have been traditionally used to derive quantitative precipitation estimation. The purpose of this research is to present the development of a regional dual polarization QPE …
-
Optoelectronic Multifractal Wavelet Analysis for Fast and Accurate Detection of Rainfall in Weather Radar Images
… 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 fast processing and wavelet …
-
RELAMPAGO-CACTI drop size distribution observations and the implications for cloud and hydrologic studies
… of drop size distributions (DSD) properties and rainfall modes among three deep convective regions (the U.S. Southern Great Plains, in Córdoba Province in subtropical South America, and Manacapuru in central Amazonia) where heavy rain-producing systems contribute the majority of rainfall in the …
-
An Improved Microwave Radiative Transfer Model For Ocean Emissivity At Hurricane Force Surface Wind Speed
… This ocean emissivity model will be incorporated into a larger radiative transfer model used to infer ocean surface wind speed and rain rate in hurricanes from remotely sensed radiometric brightness temperature. The model development is based on measurements obtained with the Stepped …
-
Climate changing in microwave telecommunication links (sleet)
… (ZDI) where falling ice begins to melt into rain. Melting ice particles produce a specific attenuation up to four times that of the associated rain rate. This work will examine NOAA NCEP/NCAR Reanalysis 1 data to identify trends in the ZDI height o. ZDI height is shown to have increased by …
-
A GPS-IPW Based Methodology for Forecasting Heavy Rain Events
… for real-time data gathering with IFLOWS (Integrated Flood Observing and Warning System) gages, WSR-88D Doppler radar, and high precision GPS (Global Positioning System) receiver. The focus of this research is to combine the measurements from these various sensors in an algorithmic framework to …
-
Investigation of the positive interaction between the primary and secondary circulation and the roles of different types of precipitation in tropical cyclone formation
… tropical cyclone development. In fact, we demonstrate that an increase in the fractional contribution by the inward moisture flux with the storm intensification implies the importance of the positive feedback among the primary circulation, the secondary circulation, and convection for tropical …
-
Development of a heterogeneous microwave network, fade simulation tool applicable to networks that span Europe
… are strongly attenuated by hydrometeors such as rain and wet snow (sleet). Hydrometeor attenuation dominates the dynamic fading of most types of radio links operating above 10 GHz, especially high capacity, fixed, terrestrial and Earth-Space links. The International Telecommunication Unions – …
-
Regional Differences in the Spatial Patterns of Precipitation Bands in Hurricanes Through Landfall along the Gulf of Mexico and Atlantic Coasts of the United States
… To better understand quantitative changes in TC rainband structure around landfall, I quantify the spatial distribution of precipitation in 62 landfalling TCs along the Gulf of Mexico and Atlantic coasts of the U.S. between 1998 and 2014. The Tropical Rainfall Measuring Mission (TRMM) 3B42 …
-
A qualitative and quantitative study of the distribution of pelagic sediment in the Atlantic Basin
… is the primary modifier of topography generated by ridge-associated volcanic and tectonic processes. This thesis represents an effort to understand the processes of, and the general distribution of, pelagic sedimentation on rough topography, particularly in the Atlantic Basin but with …
-
Impact of the Agulhas Current on storm development
… Current's sea surface temperature (SST) on rain producing, synoptic scale weather features. Two model configurations: Control (CTL) and Smooth (SMTH) are analysed to understand the effect of the Agulhas Current's SST and high latent heat fluxes on storms that develop or track over the …
-
A qualitative and quantitative study of the distribution of pelagic sediment in the Atlantic Basin
… is the primary modifier of topography generated by ridge-associated volcanic and tectonic processes. This thesis represents an effort to understand the processes of, and the general distribution of, pelagic sedimentation on rough topography, particularly in the Atlantic Basin but with …
Page 1 of 2