Counter electrojet features in the Brazilian sector: simultaneous observation by radar, digital sounder and magnetometers
| Autor: | Laysa Cristina Araujo Resende, J. H. A. Sobral, M. A. Abdu, Clezio Marcos Denardini, P.D.S.C. Almeida, H. C. Aveiro, Ê. P. A. Olívio, Cristiano Max Wrasse |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Atmospheric Science
Electron density Magnetometer lcsh:QC801-809 Electrojet Geology Astronomy and Astrophysics Equatorial electrojet Sporadic E propagation lcsh:QC1-999 law.invention Magnetic field lcsh:Geophysics. Cosmic physics Space and Planetary Science law Earth and Planetary Sciences (miscellaneous) lcsh:Q Radar Power intensity lcsh:Science lcsh:Physics Remote sensing |
| Zdroj: | Annales Geophysicae, Vol 27, Pp 1593-1603 (2009) ResearcherID Annales Geophysicae, Vol 27, Iss 4, Pp 1593-1603 (2009) |
| ISSN: | 1432-0576 0992-7689 |
| Popis: | In the present work we show new results regarding equatorial counter electrojet (CEJ) events in the Brazilian sector, based on the RESCO radar, two set of fluxgate magnetometer systems and a digital sounder. RESCO radar is a 50 MHz backscatter coherent radar installed in 1998 at São Luís (SLZ, 2.33° S, 44.60° W), an equatorial site. The Digital sounder routinely monitors the electron density profile at the radar site. The magnetometer systems are fluxgate-type installed at SLZ and Eusébio (EUS, 03.89° S, 38.44° W). From the difference between the horizontal component of magnetic field at SLZ station and the same component at EUS (EEJ ground strength) several cases of westward morning electrojet and its normal inversion to the eastward equatorial electrojet (EEJ) have been observed. Also, the EEJ ground strength has shown some cases of CEJ events, which been detected with the RESCO radar too. Detection of these events were investigated with respect to their time and height of occurrence, correlation with sporadic E (Es) layers at the same time, and their spectral characteristics as well as the radar echo power intensity. |
| Databáze: | OpenAIRE |
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