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Showing 1 to 20 of 23 for “"Radar Reflectivity"”.

  1. Determining Best Method For Estimating Observed Level Of Maximum Convective Detrainment Based On Radar Reflectivity

    Carletta, Nicholas Daniel

    … within convection using data from individual radars. Three methods were used to identify the LMD and validated against dual-Doppler derived vertical mass divergence fields. The best method for locating the LMD was determined to be the method that uses a horizontal reflectivity texture-based …

    nodak Repository record

  2. A study of lightning flashes attending periods of banded heavy snowfall

    Becker, Amy E.University of Missouri--Columbia2007

    … polarity, signal strength, and multiplicity. Radar reflectivity values were recorded at each lighting flash, as well as the maximum radar reflectivity within the associated snow band. The preferred location of the lightning activity within the snow band was also noted as being either leading …

    missouri Repository record

  3. Dynamic model for space-time weather radar observation and nowcasting

    Xu, Gang, author, Chandrasekar, V., advisor, Bringi, V. N., committee member, Jayasumana, Anura P., committee member, Mielke, Paul W., Jr., committee memberColorado State University. Libraries2007

    … 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 …

    colostate Repository record

  4. Optimizing Z/R Relationship for Radar-based Precipitation Estimates

    Gary, Jalon2024

    … relationship is a power law relationship between radar reflectivity (Z) and rainfall rate (R). The relationship is expressed as Z = aRb where a and b are correlated with drop size distribution (DSD) and vary across locations. Using a Z/R relationship to translate radar reflectivity to rainfall …

    columbus-state Repository record

  5. Determination of Sensors Characteristics of Curb and Development of Surrogate Curb for the Evaluation of Vehicle Active Safety Systems

    Pandey, Seeta Ram2020

    … sensors on the vehicles such as camera, radar, and LIDAR. One of such everyday roadside objects is the curbs. For developing a surrogate for the curb, the first step is to recognize what the roadside objects should look like concerning different sensors, and the next step is to design and …

    iupui Repository record

  6. Integrating Multi-Source Weather Data for Deep Learning

    alanbari, haidar A, Mr2019

    … include Next-Generation NEXRAD [3] Doppler radar reflectivity, GOES-16 [4] multi-channel satellite imagery and NCEI [1] storm events. Then, it integrates and refines data in proper formats to be fed to the open-source Detectron [5] Deep learning software package from Facebook. The …

    cuny Repository record

  7. Factors Controlling the Extent and Location of Cumulus Convection over the Sierras de Córdoba

    Knopp, Tracen2024

    … these interactions we combine satellite, radar velocity, radar reflectivity, and stereographic/photogrammetric analyses of mountain flows and their resulting cloud cover. We also use thermodynamic analyses to understand what air is being lifted to produce the observed clouds and to what …

    unr Repository record

  8. Radar multi-sensor (RAMS) quantitative precipitation estimation (QPE)

    Willie, Delbert Darrell, author, Chandrasekar, V., advisor, Mielke, Paul, committee member, Jayasumana, Anura P., committee member, Notaros, Branislav, committee memberColorado State University. Libraries2015

    … researchers and forecasters. The ability of radar to measure over broad spatial areas in short temporal successions encourages its application in the pursuit of accurate rainfall estimation, where radar reflectivity-rainfall (Z-R) relations have been traditionally used to derive quantitative …

    colostate Repository record

  9. Characterization of Tropical Clouds Using Multi-Satellite Observations

    Anderson, Ricardo2015

    … focus on the synergy between Cloudsat and TRRM radar reflectivity data in a CFAD (Contoured Frequency by Altitude Diagram) framework and apply a clustering analysis to identify distinct clusters. The properties of these clusters were also further analyzed with regards to their cloud top height …

    cuny Repository record

  10. Cross validation of observations from the GPM dual-frequency precipitation radar and dual-polarization S-band ground radars

    Biswas, Sounak Kumar, author, Chandrasekar, V., advisor, Cheney, Margaret, committee member, Mielke, Paul W., committee memberColorado State University. Libraries2018

    … Satellite with dual polarization S-Band Ground Radars. The GPM mission is a joint venture by the NASA and the JAXA. The radar on board the core observatory is a dual-frequency precipitation radar (DPR) capable of simultaneously operating at 13.6 GHz (Ku band) and 35.5 GHz (Ka band). The DPR is …

    colostate Repository record

  11. Fusion of observations from C-band polarimetric radar and S-band profiler radar during a convective storm

    Adubi, Tunde Habibullah, author, Venkatachalam, Chandrasekar, advisor, Cheney, Margaret, committee member, Popat, Ketul, committee memberColorado State University. Libraries2024

    … to measure and correct attenuation of the radar signals caused by the presence of partially melted ice hydrometeors (graupels and hails) in convective storms by utilizing simultaneous observations from a C-Band dual-polarization scanning radar and a vertically pointing S-Band profiler …

    colostate Repository record

  12. A physical model to estimate snowfall over land using microwave measurements

    Kim, Min-Jeong2004

    … calculated in this study were compatible with radar and radiometer measurements for the limited number of examples.The retrieval algorithm relied on a multi-parameter cloud model to generate the vertical structure of a snow cloud, including snow water content, snow particle effective diameter, …

    washington Repository record

  13. A comparison of X-band polarization parameters with in-situ microphysical measurements in the comma head of two winter cyclones

    Finlon, Joseph A.University of Illinois at Urbana-Champaign2016

    Since the advent of dual-polarization radar, methods of classifying hydrometeors by type from measured polarization variables have been developed. However, the deterministic approach of existing hydrometeor classification algorithms of assigning only one dominant habit to each volume does not …

    uiuc Repository record

  14. Structure of an east coast cyclone derived from airborne radar and model diagnostics

    Janiszeski, Andrew R.University of Illinois at Urbana-Champaign2018

    Data from airborne W-band radar along with Weather Research and Forecasting (WRF) Model thermodynamic fields and air-parcel back trajectories from the HYSPLIT model are used to determine causes of finescale features of a northeast U.S. cyclone and link them to synoptic and air mass structure. The …

    uiuc Repository record

  15. Dual-Polarization Radar Characteristics of Convection in Hawaii during HERO

    Frambach, Andrew2017

    … fall of 2013 a Doppler on Wheels (DOW) mobile radar was deployed to O`ahu as part of the Hawaiian Educational Radar Opportunity (HERO). The project was one of the first dual-Polarization field experiments to date performed in Hawai`i. Dual-polarization radars send and receive pulses with both …

    hawaii Repository record

  16. Observations of misovortices within the 7 January 2014 Long Lake-Axis-Parallel lake-effect snow band during the Ontario Winter Lake-effect Systems Project

    Mulholland, Jake PatrickUniversity of Illinois at Urbana-Champaign2016

    … co-located with a sharp horizontal gradient in radar reflectivity, which corresponds to the region of maximum vertical velocities. One particular band from the OWLeS Project, in which an abundance of misovortices developed, occurred on 7 January 2014. Steiger et al. (2013) postulated that the …

    uiuc Repository record

  17. Trade wind cloud evolution observed by polarization radar: relationship to aerosol characteristics

    Minor, Hilary A.University of Illinois at Urbana-Champaign2010

    … warm rain formation in trade-wind cumulus using radar and 2) determine the sensitivity of precipitation development in shallow maritime cumuli to variations in giant (sea salt) condensation nuclei (GCN) and other factors such as cloud organization. The microphysical evolution of trade wind …

    uiuc Repository record

  18. Numerical simulations of mesoscale convective systems: techniques for comparison with observations and a high resolution analysis of flow patterns in the convective region and transition zone of a simulated mcs

    Fay, Bethany NicoleUniversity of Illinois at Urbana-Champaign2018

    … comparisons. In Chapter 2 of this work, airborne radar observations taken during the 9-10 June 2003 MCS observed during BAMEX are compared against numerical simulations performed using the Weather Research and Forecasting (WRF) model. Comparisons are carried out using the equivalent radar …

    uiuc Repository record

  19. GREMLIN: GOES radar estimation via machine learning to inform NWP

    Hilburn, Kyle Aaron, author, Miller, Steven D., advisor, Kummerow, Christian D., committee member, Barnes, Elizabeth A., committee member, Ebert-Uphoff, Imme, committee member, Alexander, Curtis R., committee memberColorado State University. Libraries2023

    … capabilities can be used to create equivalent radar reflectivity suitable for initializing convection in high-resolution NWP models. Chapter 1 will present a proof-of-concept that ML can be used as an observation operator for GOES-R to simulate Multi-Radar Multi-Sensor (MRMS) composite …

    colostate Repository record

  20. Improving active remote sensing retrievals of snowfall at microwave wavelengths: an emphasis on the global precipitation measurement mission’s dual-frequency precipitation radar

    Chase, Randy JUniversity of Illinois at Urbana-Champaign2021

    … Thus, the retrieval of snowfall from spaceborne radars that can sample remote regions of the world is invaluable for both atmospheric and climate sciences. One spaceborne radar capable of measuring snowfall is the Global Precipitation Measurement mission’s Dual-frequency Precipitation Radar …

    uiuc Repository record

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