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dc.contributor.advisorCruz-Pol, Sandra L.
dc.contributor.authorLeón, Leyda
dc.date.accessioned2019-05-14T14:54:11Z
dc.date.available2019-05-14T14:54:11Z
dc.date.issued2004
dc.identifier.urihttps://hdl.handle.net/20.500.11801/2145
dc.description.abstractIn this research, two Doppler radars working at W-band (95GHz) and at S-band (2.8GHz) together with radiosonde observations (RaOb) were used to retrieve physical parameters such as rainfall rate and vertical air motion (Wt) in rain. These instruments were deployed at the U.S. Department of Energy Atmospheric Radiation Measurement (DOE ARM) Cloud and Radiation Testbed (CART) site in Lamont, Oklahoma where rain data was collected on November 8, 2001 at hour 21:00:17 UTC. In order to retrieve these parameters, the data was processed and analyzed following an iterative method similar to that proposed by Firda [Firda et al., 1999, Firda 1997], but using the Marshall-Palmer drop size distribution and a lower non-attenuating frequency, to consider higher rainfall rates. This iterative method includes the use of Liebe’s model for suspended water droplets, Mie scattering theory, Green’s raindrops shape model and the ideal gas model. Rainfall rates were found to go from 0 mm/hr to 69.9 mm/hr. Vertical air motion was retrieved and values described updraft up to 2.5 m/s and downdrafts up to -1.2 m/s.en_US
dc.description.abstractEn esta investigación, se utilizaron dos radares Doppler que trabajan en las bandas W (95GHz) y S (2.8GHz) junto con datos obtenidos por las observaciones de radiosondas para obtener parámetros físicos como las razones de lluvia y el movimiento vertical del aire de un evento de lluvia. Estos instrumentos se encuentran en el Cloud and Radiation Testbed (CART) en Lamont, Oklahoma, en donde datos de lluvia fueron obtenidos el 8 de noviembre de 2001 a las 21:00:17 UTC. Para obtener estos parámetros, los datos fueron procesados y analizados siguiendo un método similar al propuesto por Firda [Firda et al., 1999; Firda, 1997] pero usando el modelo de Marshall-Palmer para la distribución de tamaño de gotas y una frecuencia no atenuante más baja para considerar lluvia más fuerte. Este método incluye el uso de modelos tales como el modelo de Liebe para gotas de agua, la teoría de Mie, el modelo de Green y el modelo de gas ideal. Fueron encontrados que los valores de razones de lluvia fluctuaban entre los 0 mm/hr y los 69.2 mm/hr. El movimiento vertical del aire fue obtenido y los valores variaban entre los -1.2 m/s y 2.5 m/s.en_US
dc.description.sponsorshipNASA grant number EEC-9986821. Center for Subsurface Sensing and Imaging Systems (CenSSIS)en_US
dc.language.isoEnglishen_US
dc.subjectEstimationen_US
dc.subjectprecipitationen_US
dc.subjectrain gaugeen_US
dc.titleRain gauge concept using s-band and w-band for estimation of moderate to heavy precipitationen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2004 Leyda Leónen_US
dc.contributor.committeeSekelsky, Stephen
dc.contributor.committeeColom-Ustáriz, José
dc.contributor.committeeVélez Reyes, Miguel
dc.contributor.representativeJiménez, Héctor J.
thesis.degree.levelM.S.en_US
thesis.degree.disciplineElectrical Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Electrical and Computer Engineeringen_US
dc.description.graduationYear2004en_US


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