• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo da variabilidade da deriva vertical do plasma ionosf?rico sobre a regi?o de Natal/RN, Fortaleza/CE e Cachoeira Paulista/SP para alguns casos de tempestades magn?ticas de abril a setembro de 2000

Serafim, Cleiton Cruz 18 August 2015 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-06T22:06:17Z No. of bitstreams: 1 CleitonCruzSerafim_DISSERT.pdf: 2617910 bytes, checksum: 72783f303b98e3db20a11f0c802eae1e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-09T00:24:52Z (GMT) No. of bitstreams: 1 CleitonCruzSerafim_DISSERT.pdf: 2617910 bytes, checksum: 72783f303b98e3db20a11f0c802eae1e (MD5) / Made available in DSpace on 2016-06-09T00:24:52Z (GMT). No. of bitstreams: 1 CleitonCruzSerafim_DISSERT.pdf: 2617910 bytes, checksum: 72783f303b98e3db20a11f0c802eae1e (MD5) Previous issue date: 2015-08-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Neste trabalho, est?o sendo apresentados os resultados da investiga??o sobre a varia??o da deriva vertical do plasma da camada F que comumente ocorre nos per?odos pr?ximos ao p?r-do-sol (entre 21UT ? 22UT), e que consiste em uma subida no per?odo do dia e uma descida no per?odo noturno da camada F sobre os munic?pios de Natal/RN (33.7? O, 5.6? S), Fortaleza/CE (38.45? O, 3.9? S) e Cachoeira Paulista/SP (45.0?O, 22.7? S). Para isso, utilizou-se dados (ionogramas) de altura virtual ( h' ) em fun??o da frequ?ncia para a camada F da ionosfera. Esses dados foram coletados por meio da ionossonda tipo CADI (Canadian Advanced Digital Ionosonde) para as cidades de Natal e Fortaleza, e pela digissonda DPS para a cidade de Cachoeira Paulista. Foram considerados apenas os dados dispon?veis de 2000, ano de solar m?ximo. Com os dados de altura virtual ( h' ) reduzidos nas frequ?ncias de 5 e 6MHz, o passo seguinte foi o c?lculo do Vz. Os resultados mostraram que a variabilidade da velocidade de deriva vertical da camada F da ionosfera em per?odos de tempestades magn?ticas est? relacionada tanto ? penetra??o de campos el?tricos quanto aos campos el?tricos do d?namo perturbado. / In this work are presented the results of research on the variation of vertical plasma drift from the F layer that commonly occurs during the period close to the going down of the sun (between 21UT - 22UT), and consisting of an increase in the F layer in time of day and a drop at night on the cities of Natal / RN (The 33.7?, 5.6? S), Fortaleza / CE (38.45? O, 3.9? S) and Cachoeira Paulista / SP (45.0?O, 22.7? S ). Thus, data was used (ionograms) virtual height t ( h' ) as a function of the frequency F for the layer of the ionosphere. These data were collected through ionossonda type CADI (Canadian Advanced Digital Ionosonde) to the cities of Natal and Fortaleza, and the Digisonde DPS to the town of Cachoeira Paulista. They considered only the data available 2000 maximum solar year. With the virtual height ( h' ) data reduced in the frequencies of 6MHz and 5MHz, the next step was to calculate. The results showed that the variability of the vertical drift rate F ionospheric layer periods of magnetic storms is related both to the penetration of the electric fields as the disturbance dynamo electric fields.

Page generated in 0.2152 seconds