[PDF] Top 20 Rev. Bras. Geof. vol.25 número2
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Rev. Bras. Geof. vol.25 número2
... de Geof´ısica Rasa do IAG-USP, visando `a obtenc¸˜ao de parˆametros ´otimos de campo para melhorar a caracterizac¸˜ao de interferˆencias normalmente encontradas no ambiente de grandes centros ... See full document
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Rev. Bras. Geof. vol.25 número2
... The S waters showed the lowest uranium concentrations and the largest diversity of 238U and 234U activity concentrations, which varied from ( 0. 5 ) mBq/L, respectively, and also present[r] ... See full document
1
Rev. Bras. Geof. vol.25 número2
... The computation of orthometric heights, in relative mode, at the RGSB stations, made possible to find the orthometric heights outliers, and the adjustment of gravimetric geoid model, all[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... neutral collision frequency (see Schunk & Nagy, 2000). A local perturbation in the plasma can grow linearly and take the form of a plasma bubble that may eventually grow further and rise upwards due to buoyant forces ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... In this work we analyze the terdiurnal tide distribution and the nonlinear interaction between diurnal and semidiurnal tides as a possible mechanism for generation of that tidal componen[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... We have developed a local ionospheric conductivity model for the Brazilian equatorial E-region based on a constant neutral atmosphere model and on an empirical electron densities mo- del[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... Type I waves are moving at a speed that usually so closely approaches the ion-acoustic speed of the medium, no matter what the ambient electric field might be, that it has become an acce[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... Finally, we have seen that applying incoherent integrations to the obser- vational radar spectra of type 1 equatorial electrojet irregularities means to increase the percentage of right [r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.1
... RESUMO. Dados de batimetria de 12 kHz e anomalias magn´eticas do fundo oceˆanico foram empregados para calcular anomalias de profundidades na cordilheira mesoceˆanica entre as Ilhas de Ascens˜ao e St. Helena. A ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... Electron Density height profiles estimated from different ty- pes of experiments namely a High Frequency capacitance probe, a Langmuir probe and a Plasma Frequency Probe during the occur[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... He developed during three years (2003-2005) activities of Undergraduate Research, studying the relationships between geomagnetic variations observed at the Earth’s surface and the Earth-[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... During the October 2003 disturbed period, the storm indu- ced eastward magnetospheric electric field that penetrated to the magnetic equator on the 29/30 and 30/31 nights and intensified[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... In this work we have used Multitaper spectral analysis on the cos- mic ray Newark’s neutron monitor and S˜ao Martinho da Serra’s muon telescope data, and we could verify the efficiency o[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... Jairo Francisco Savian is a Physics Undergraduate student, attending the ninth semester, at the Federal University of Santa Maria (UFSM), is a trainee and currently is developing his fou[r] ... See full document
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Rev. Bras. Geof. vol.25 suppl.2
... Fast forward interplanetary shocks (FFS) are characterized by positive jump in all interplanetary plasma parameters (solar wind speed, temperature and density) and interplanetary magneti[r] ... See full document
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Rev. Bras. Geof. vol.18 número2
... Heat flow measurements in San Juan and Mendoza region (Uyeda et al., 1978b) give the tenta- tive heat flow value of about 20-25 mW/m² at the latitudes of 31° 33' S and 32° 48' S. In Chile, Uyeda et al. (1978a) ... See full document
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Rev. Bras. Geof. vol.18 número2
... In Part 1 of this paper (Helbig, 1998 - Rev. Bras. Geof. 16 (2–3):103–114) it was shown that a medium consisting of a periodic sequence of layers is, in the long-wavelength approximation, equivalent ... See full document
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Rev. Bras. Geof. vol.18 número2
... Geochemical analyses showed that the Pampeano aquifer has bicarbonate sodium water, with an increase of electrical conductivity, sodium and bicarbonates contents at a local recharge zon[r] ... See full document
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Rev. Bras. Geof. vol.19 número2
... A new airglow observation site in the equatorial zone was set up at São João do Cariri (Paraíba State) where a multi-filter airglow photometer was installed, measuring the atomic oxygen[r] ... See full document
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Rev. Bras. Geof. vol.19 número2
... In this work, we model the temperature variation (frequency variation) due to the Doppler effect and apply the new temperature distribution in the thermal re-emission model. The total fo[r] ... See full document
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