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dc.contributor.advisor Balsley, Ben B.
dc.contributor.author Chau Chong Shing, Jorge Luis
dc.date.accessioned 2015-07-24T20:54:17Z
dc.date.accessioned 2017-02-27T22:52:03Z
dc.date.available 2015-07-24T20:54:17Z
dc.date.available 2017-02-27T22:52:03Z
dc.date.issued 1998
dc.identifier.citation Chau, J. L. (1998).==$Examination of various techniques for measuring wind velocities using clear-air radars, with emphasis on vertical wind measurements$==(Thesis for the degree of Doctor of Philosophy). University of Colorado, Colorado, United States. es_ES
dc.identifier.uri http://hdl.handle.net/20.500.12816/17
dc.description.abstract In this work, I examine various techniques for measuring wind velocities using clear-air radars. Special emphasis has been given to the vertical wind measurements. All the observations were obtained in the lower atmosphere (below 20 km) using the Jicamarca 50 MHz radar system near Lima, Peru. I have concentrated my efforts on: (a) examining: different radar techniques for horizontal wind estimation, (b) improving the understanding of angle-of-arrival radar measurements, and (c) comparing a number of techniques for the measurement of the vertical wind velocities. I have measured horizontal wind velocities by a variety of both time- and frequency-domain spaced antenna (SA) techniques. Comparisons of these techniques for both zonal and meridional components have been carried out in a statistical sense. Two sets of data were analyzed under both "quiet" (low wind, low variability) and "active" (high wind, high variability) conditions. I have found that the simpler techniques that assume horizontally isotropic scattering compare well with the more complicated full correlation analysis techniques. Briefly, while all SA techniques give essentially the same horizontal wind direction, considerable discrepancies are apparent in the wind speed, particularly above 15 km. With regard to technique comparisons for vertical velocity, two types of measurement techniques using a concurrent data set are compared. Both Zenith (i.e., using a vertically-directed single beam) techniques and spaced antenna (SA) techniques are compared using a concurrent 5-day data set obtained with a special configuration of the Jicamarca 50 MHz radar antenna. Two separate Zenith techniques are implemented using different antenna beam-widths (a 0.85º and a 3º beam-width). Different SA approaches are also implemented using a: "quasi" Doppler beam swinging (DBS) approach and four "classical" SA approaches. "Classical" SA approaches make use of horizontal wind and AOA measurements to get 'corrected' vertical velocities. Statistical results are presented for both quiet and active conditions. es_ES
dc.description.uri Tesis es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher University of Colorado es_ES
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri https://creativecommons.org/licences/by/4.0/ es_ES
dc.subject Weather radar es_ES
dc.subject Wind es_ES
dc.subject Atmospheric dispersion es_ES
dc.subject Atmosphere es_ES
dc.title Examination of various techniques for measuring wind velocities using clear-air radars, with emphasis on vertical wind measurements es_ES
dc.type info:eu-repo/semantics/doctoralThesis es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.01 es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#2.02.00 es_ES
thesis.degree.name Doctor of Philosophy es_ES
thesis.degree.grantor University of Colorado, Department of Electrical and Computer Engineering es_ES
thesis.degree.level Doctorado es_ES
thesis.degree.discipline Ingenieria Eléctrica es_ES

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