| Full text | |
| Author(s): |
Denardini, C. M.
[1]
;
Aveiro, H. C.
[2]
;
Sobral, J. H. A.
[1]
;
Bageston, J. V.
[1]
;
Guizelli, L. M.
[1, 3]
;
Resende, L. C. A.
[1]
;
Moro, J.
[1]
Total Authors: 7
|
| Affiliation: | [1] Natl Inst Space Res, Aeron Div, Sao Jose Dos Campos, SP - Brazil
[2] Cornell Univ, Ithaca, NY - USA
[3] Univ Taubate, Dept Elect Engn, Taubate, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Advances in Space Research; v. 51, n. 10, p. 1857-1869, MAY 15 2013. |
| Web of Science Citations: | 8 |
| Abstract | |
Zonal and vertical electric fields were estimated at E region heights in the Brazilian sector. Zonal electric fields are obtained from the vertical electric fields based on their relation through the Hall-to-Pedersen ionospheric conductivities ratio. The technique for obtaining the vertical electric field is based on its proportionality to the Doppler velocities of type 2 irregularities as detected by coherent radars. The 50 MHz backscatter coherent (RESCO) radar was used to estimate the Doppler velocities of the type 2 irregularities embedded in the equatorial electrojet. A magnetic field-line integrated conductivity model was developed to provide the conductivities. It considers a multi-species ionosphere and a multi-species neutral atmosphere, and uses the IRI 2007, the MISTS 2000 and the IGRF 10 models as input parameters for ionosphere, neutral atmosphere and Earth's magnetic field, respectively. The ion-neutral collision frequencies of all the species are combined through the momentum transfer collision frequency equation, and different percentages of electron-neutral collisions were artificially included for studying the implication of such increase in the zonal electric field, which resulted ranging from 0.13 to 0.49 mV/m between the 8 and 18 h (LT), under quiet magnetic conditions. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 10/06608-2 - Study of the dynamics of mesosphere and lower thermosphere region (80 to 100 km high) over King George Island, Antarctica (62 deg S) |
| Grantee: | José Valentin Bageston |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 11/00898-1 - 2011 International Union of Geodesy and Geophysics (IUGG) General Assembly |
| Grantee: | Clezio Marcos de Nardin |
| Support Opportunities: | Research Grants - Meeting - Abroad |