Littérature scientifique sur le sujet « Equatorial E-region »
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Articles de revues sur le sujet "Equatorial E-region"
Raghavarao, R., A. K. Patra et S. Sripathi. « Equatorial E region irregularities : a review of recent observations ». Journal of Atmospheric and Solar-Terrestrial Physics 64, no 12-14 (août 2002) : 1435–43. http://dx.doi.org/10.1016/s1364-6826(02)00107-4.
Texte intégralKherani, Esfhan A., et Eurico R. de Paula. « Observations of Quasi-Periodic Electric Field Disturbances in the E Region before and during the Equatorial Plasma Bubble ». Atmosphere 12, no 9 (27 août 2021) : 1106. http://dx.doi.org/10.3390/atmos12091106.
Texte intégralOnohara, A. N., I. S. Batista et H. Takahashi. « The ultra-fast Kelvin waves in the equatorial ionosphere : observations and modeling ». Annales Geophysicae 31, no 2 (7 février 2013) : 209–15. http://dx.doi.org/10.5194/angeo-31-209-2013.
Texte intégralHari, S. S., et B. V. Krishna Murthy. « Equatorial night-time F-region zonal electric fields ». Annales Geophysicae 13, no 8 (31 août 1995) : 871–78. http://dx.doi.org/10.1007/s00585-995-0871-8.
Texte intégralSridharan, R., C. V. Devasia, N. Jyoti, Diwakar Tiwari, K. S. Viswanathan et K. S. V. Subbarao. « Effects of solar eclipse on the electrodynamical processes of the equatorial ionosphere : a case study during 11 August 1999 dusk time total solar eclipse over India ». Annales Geophysicae 20, no 12 (31 décembre 2002) : 1977–85. http://dx.doi.org/10.5194/angeo-20-1977-2002.
Texte intégralFarley, D. T. « The equatorial E-region and its plasma instabilities : a tutorial ». Annales Geophysicae 27, no 4 (2 avril 2009) : 1509–20. http://dx.doi.org/10.5194/angeo-27-1509-2009.
Texte intégralCousins, A. W. J., et J. A. R. Caldwell. « DDO photometry of E-region stars and equatorial standards -- II ». Monthly Notices of the Royal Astronomical Society 281, no 2 (11 juillet 1996) : 522–30. http://dx.doi.org/10.1093/mnras/281.2.522.
Texte intégralSinha, H. S. S., R. Pandey, Shweta Sharma et R. N. Misra. « Nighttime E region plasma irregularities over an equatorial station Trivandrum ». Journal of Atmospheric and Solar-Terrestrial Physics 73, no 17-18 (novembre 2011) : 2444–52. http://dx.doi.org/10.1016/j.jastp.2011.10.005.
Texte intégralChau, J. L., R. F. Woodman et L. A. Flores. « Statistical characteristics of low-latitude ionospheric field-aligned irregularities obtained with the Piura VHF radar ». Annales Geophysicae 20, no 8 (31 août 2002) : 1203–12. http://dx.doi.org/10.5194/angeo-20-1203-2002.
Texte intégralOppenheim, Meers M., Axel F. vom Endt et Lars P. Dyrud. « Electrodynamics of meteor trail evolution in the equatorial E-region ionosphere ». Geophysical Research Letters 27, no 19 (1 octobre 2000) : 3173–76. http://dx.doi.org/10.1029/1999gl000013.
Texte intégralThèses sur le sujet "Equatorial E-region"
Aveiro, Henrique Carlotto. « Electric and magnetic field signatures of gravity waves and 2-day planetary waves in the equatorial E-region ». Instituto Nacional de Pesquisas Espaciais, 2009. http://urlib.net/sid.inpe.br/mtc-m18@80/2008/12.16.11.31.
Texte intégralEquatorial electrojet (EEJ) observations using VHF radars show backscattered echoes from two types of electron density irregularities explained by the modified two-stream (Type I) and the gradient drift (Type 11) instabilities. From the Type II irregularity velocities obtained by radar data we have inferred the vertical electric fields (E_z). The harmonic analysis of such fields shows the presence of gravity waves-induced electric fields in the EEJ. We calculated the ratio between GW-related electric fields and the total E_z. This factor is an indicator of the efficiency in the production of an additional electric field due to a gravity wave neutral wind. Also, we analyze the effects of the 2-day wave activity in the EEJ using one coherent radar and eight magnetometer stations located dose to the dip equator. The wavelet analysis of the magnetometer data reveals a 2-day signature in the semidiurnal geomagnetic tide. The E-region zonal background ionospheric electric field derived from coherent radar measurements shows 2-day oscillations in agreement with such oscillations in the magnetometer data set. An anticorrelation between the tidal periodicites (diurnal, and semidiurnal) and the 2-day signature is also shown in the electric fields. The results are compared with simultaneous observations of 2-day planetary wave in meridional winds and ionosondes available in the literature. Our results are discussed based on the analysis of the magnetic activity.
Fern, C. L., et 馮志龍. « Simulations of Pure Two-Stream Waves in the Equatorial E-region Ionosphere ». Thesis, 2001. http://ndltd.ncl.edu.tw/handle/74234128445303163268.
Texte intégral國立中央大學
太空科學研究所
89
At the altitude range of 95∼110 km in the equatorial E-region ionosphere, a large current in the magnetic equator called the equatorial electrojet is created by a dynamic process involving atmospheric tides. The equatorial electrojet causes the medium to be unstable to generate plasma waves. Radar observations have shown the existence of two classes of plasma waves, called typeⅠand typeⅡ. The typeⅠwave resulting from the two-stream instability is also called two-stream wave. In this paper, the behavior of two-stream wave in the plane perpendicular to the Earth's magnetic field is simulated by a two-dimensional fluid model simulation code in which the electron inertia is neglected while the ion inertia is retained. We consider the suitable two-dimensional simulation space (27×54m ) and successfully excite the dominant 3-meter wave compatible with VHF radar echoes. The analysis methods of two-dimensional Fourier series are derived to express the time variation of mode powers and ω spectra. From the series of simulation results for two-stream waves in the equatorial E-region ionosphere, we have studied the dispersion relations, the resonant coupling, and the echo power variation with the zenith angle rate of approximately 0.3(dB/degree). We have also studied the vertical small-scale waves developed from the distortions of the dominant waves. The vertical waves will cause dominant waves to turn away from the electrojet drift direction (E×B ). The important point about the development of vertical modes is asymmetry. We find that the spectral asymmetry depends on the scale size of plasma waves, that is, the large-scale waves (above 3 meters) propagate in the k‧E<0 region, and the small-scale (smaller than 3 meters) propagate in the k‧E>0 region. The simulation result of up-down asymmetry for 3-meter wave is consistent with the radar observations. We believe that the background polarization electric field E driving the electrojet is responsible for the spectral asymmetries. In the same time, owning to the strong and fixed background polarization electric field E , the wave frequency depends only on horizontal wave number Kx . Therefore, the phase velocities of many obliquely propagating two-stream waves (Kz≠0 ) are below the value predicted by linear theory, and this characteristic is prominent especially for large-scale waves.
Livres sur le sujet "Equatorial E-region"
Estimating Equatorial F-Region Daytime Vertical E x B Drift Velocities from Ground-Based Magnetometer Measurements in the Philippine Longitude Sector. Storming Media, 2004.
Trouver le texte intégralActes de conférences sur le sujet "Equatorial E-region"
Denardini, Clezio Marcos. « A Conductivity Model for the Brazilian Equatorial E-Region ». Dans 9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2005. http://dx.doi.org/10.1190/sbgf2005-435.
Texte intégralMarcos Denardini, Clezio. « A Conductivity Model for the Brazilian Equatorial E-Region ». Dans 9th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.160.sbgf435.
Texte intégralSuclupe, Jose M., Edgardo E. Pacheco et Percy J. Condor. « Automatic identification and observations of blanketing sporadic E events in the equatorial region over Jicamarca ». Dans 2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2020. http://dx.doi.org/10.23919/ursigass49373.2020.9232028.
Texte intégralRajana, Siva Sai Kumar, Sampad Kumar Panda et Sridevi Jade. « Characteristics of Equatorial F-region Irregularities along the 90°E Meridian during High Solar Activity Phase ». Dans 2022 URSI Regional Conference on Radio Science (USRI-RCRS). IEEE, 2022. http://dx.doi.org/10.23919/ursi-rcrs56822.2022.10118463.
Texte intégralSamanes, Jorge, et Fernanda Florez. « Analysis of the nighttime lower ionosphere for equatorial, low and middle latitudes over a region from 30°E and 60°E ». Dans 2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2020. http://dx.doi.org/10.23919/ursigass49373.2020.9232313.
Texte intégralMuralikrishna, P., I. S. Batista et M. A. Abdu. « Solar and Magnetic Declination Control of the Pre-Reversal Enhancement in the Equatorial E- and F-Region Electric Fields ». Dans 2nd International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1991. http://dx.doi.org/10.3997/2214-4609-pdb.316.6.
Texte intégralMuralikrishna, P., I. S. Batista et M. A. Abdu. « PRE-REVERSAL ENHANCEMENT IN THE EQUATORIAL E AND F REGION ELECTRON DRIFT, VELOCITIES AND ITS SEASONAL VARIATION - AN EXPLANATION ». Dans 1st International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1989. http://dx.doi.org/10.3997/2214-4609-pdb.317.sbgf166.
Texte intégralDenardini, C. M., H. C. Aveiro, P. D. S. C. Almeida, L. C. A. Resende, J. V. Bageston, E. P. A. Olívio, L. M. Guizelli et C. M. Wrasse. « New Features of the Field-Aligned-Integrated Conductivity Model for the Brazilian Equatorial E-Region and the Implication on the Collision Rates ». Dans 11th International Congress of the Brazilian Geophysical Society & EXPOGEF 2009, Salvador, Bahia, Brazil, 24-28 August 2009. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2009. http://dx.doi.org/10.1190/sbgf2009-022.
Texte intégralDenardini, C. M., E. P. A. Olívio, H. C. Aveiro, P. D. S. C. Almeida, L. C. A. Resende, L. M. Guizelli, C. M. Wrasse et J. V. Bageston. « New Features Of The Field-Aligned-Integrated Conductivity Model For The Brazilian Equatorial E-Region And The Implication On The Collision Rates ». Dans 11th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609-pdb.195.1616_evt_6year_2009.
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