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Artykuły w czasopismach na temat "Equatorial electrojetc"
Rastogi, R. G. "Meridional equatorial electrojet current in the American sector". Annales Geophysicae 17, nr 2 (28.02.1999): 220–30. http://dx.doi.org/10.1007/s00585-999-0220-4.
Pełny tekst źródłaReddy, C. A. "The equatorial electrojet". Pure and Applied Geophysics PAGEOPH 131, nr 3 (1989): 485–508. http://dx.doi.org/10.1007/bf00876841.
Pełny tekst źródłaKlimenko, M. V., V. V. Klimenko i V. V. Bryukhanov. "Numerical modeling of the equatorial electrojet UT-variation on the basis of the model GSM TIP". Advances in Radio Science 5 (13.06.2007): 385–92. http://dx.doi.org/10.5194/ars-5-385-2007.
Pełny tekst źródłaUgwu, Ernest Benjamin Ikechukwu, i Christopher Ekene Okeke. "On the Variation of Geomagnetic H-Component during Solar Quiet Days". European Journal of Applied Physics 3, nr 2 (25.03.2021): 11–15. http://dx.doi.org/10.24018/ejphysics.2021.3.2.35.
Pełny tekst źródłaStening, Robert J. "Modeling the equatorial electrojet". Journal of Geophysical Research 90, A2 (1985): 1705. http://dx.doi.org/10.1029/ja090ia02p01705.
Pełny tekst źródłaAkiyama, T., A. Yoshikawa, A. Fujimoto i T. Uozumi. "Relationship between plasma bubble and ionospheric current, equatorial electrojet, and equatorial counter electrojet". Journal of Physics: Conference Series 1152 (styczeń 2019): 012022. http://dx.doi.org/10.1088/1742-6596/1152/1/012022.
Pełny tekst źródłaAbdu, M. A. "The international equatorial electrojet year". Eos, Transactions American Geophysical Union 73, nr 5 (1992): 49. http://dx.doi.org/10.1029/91eo00044.
Pełny tekst źródłaRastogi, R. G. "Critical problems of equatorial electrojet". Advances in Space Research 12, nr 6 (1992): 13–21. http://dx.doi.org/10.1016/0273-1177(92)90035-v.
Pełny tekst źródłaStening, R. J. "What drives the equatorial electrojet?" Journal of Atmospheric and Terrestrial Physics 57, nr 10 (sierpień 1995): 1117–28. http://dx.doi.org/10.1016/0021-9169(94)00127-a.
Pełny tekst źródłaKobea, A. T., C. Amory-Mazaudier, J. M. Do, H. Lühr, E. Houngninou, J. Vassal, E. Blanc i J. J. Curto. "Equatorial electrojet as part of the global circuit: a case-study from the IEEY". Annales Geophysicae 16, nr 6 (30.06.1998): 698–710. http://dx.doi.org/10.1007/s00585-998-0698-1.
Pełny tekst źródłaRozprawy doktorskie na temat "Equatorial electrojetc"
Khadka, Sovit M. "Multi-diagnostic Investigations of the Equatorial and Low-latitude Ionospheric Electrodynamics and Their Impacts on Space-based Technologies". Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:108001.
Pełny tekst źródłaThesis advisor: Dr. Cesar E. Valladares
The equatorial and low-latitude ionosphere of the Earth exhibits unique features on its structuring, coupling, and electrodynamics that offer the possibility to forecast the dynamics and fluctuations of ionospheric plasma densities at later times. The scientific understanding and forecasting of ionospheric plasma are necessary for several practical applications, such as for mitigating the adverse effects of space weather on communication, navigation, power grids, space mission, and for various scientific experiments and applications. The daytime equatorial electrojet (EEJ), equatorial ionization anomaly (EIA), as well as nighttime equatorial plasma bubble (EPB) and plasma blobs are the most prominent low-latitude ionospheric phenomena. This dissertation focuses on the multi-diagnostic study of the mechanism, properties, abnormalities, and interrelationships of these phenomena to provide significant contributions to space weather communities from the ground- and space-based measurements. A strong longitudinal, seasonal, day-to-day variability and dependency between EEJ, ExB vertical plasma drift, and total electron content (TEC) in the EIA distribution are seen in the equatorial and low-latitude region. In general, the EEJ strength is stronger in the west coast of South America than in its east coast. The variability of the EEJ in the dayside ionosphere significantly affects the ionospheric electron density variation, dynamics of the peak height of F2-layer, and TEC distributions as the EEJ influences the vertical transport mechanism of the ionospheric plasma. The eastward electric field (EEF) and the neutral wind play a decisive role in controlling the actual configuration of the EIA. The trans-equatorial neutral wind profile calculated using data from the Second-generation, Optimized, Fabry-Perot Doppler Imager (SOFDI) located near the geomagnetic equator and a physics-based numerical model, LLIONS (Low-Latitude IONospheric Sector) give new perspectives on the effects of daytime meridional neutral winds on the consequent evolution of the asymmetry of the equatorial TEC anomalies during the afternoon onwards. The spatial configurations including the strength, shape, amplitude and latitudinal extension of the EIA crests are affected by the EEF associated with the EEJ under undisturbed conditions, whereas the meridional neutral winds play a significant role in the development of their asymmetric structure in the low-latitude ionosphere. Additionally, the SWARM satellite constellation and the ground-based LISN (Low-Latitude Ionospheric Sensor Network) data allow us to resolve the space-time ambiguity of past single-satellite studies and detect the drastic changes that EPBs and plasma blobs undergo on a short time scale. The coordinated quantitative analysis of a plasma density observation shows evidence of the association of plasma blobs with EPBs via an appropriate geomagnetic flux tube. Plasma blobs were initially associated with the EPBs and remained at the equatorial latitude right above the EPBs height, but later were pushed away from geomagnetic equator towards EIA latitudes by the EPB/ depleted flux tubes that grew in volume. Further, there exists a strong correlation between the noontime equatorial electrojet and the GPS-derived TEC distributions during the afternoon time period, caused by vertical E × B drift via the fountain effect. Nevertheless, only a minor correlation likely exists between the peak EEJ and the net postsunset ionospheric scintillation index (S4) greater than 0.2. This study not only searches for a mutual relationship between the midday, afternoon and nighttime ionospheric phenomena but also aims at providing a possible route to improve our space weather forecasting capability by predicting nighttime ionospheric irregularities based on midday measurements at the equatorial and low latitudes
Thesis (PhD) — Boston College, 2018
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
Siddiqui, Tarique Adnan [Verfasser], i Claudia [Akademischer Betreuer] Stolle. "Long-term investigation of the lunar tide in the equatorial electrojet during stratospheric sudden warmings / Tarique Adnan Siddiqui ; Betreuer: Claudia Stolle". Potsdam : Universität Potsdam, 2017. http://d-nb.info/1218403225/34.
Pełny tekst źródłaLuu, Viet Hung. "Étude du champ électromagnétique et interprétation de données magnétotelluriques au Vietnam". Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112350.
Pełny tekst źródłaThis thesis is devoted to the study of the electrical structure of the Earth’s crust in two regions of Vietnam (the Red River Delta in the north and the region of the Saigon River fault in the south) and in West Africa. The data were those acquired during the International Year of the Equatorial Electrojet (IYEE). The technique used is the magnetotelluric (MT) sounding method. Two of the regions studied (southern Vietnam and West Africa) are located near the magnetic equator. Due to the presence of the equatorial electrojet in these regions, the assumption of plane wave, on which MT relies, is valid for a limited range of periods. Modeling of the induction by a Gaussian electrojet allowed us to characterize the source effect associated with the equatorial electrojet, and to determine for each studied region the period ranges for which the source effect is negligible. We have also shown that the source effect associated with the equatorial electrojet depends on the main features of the electrical structure of the basement, and the distance between the center of the equatorial electrojet and the location of the considered station. In the Red River Delta at the north, the MT profile is oriented SW-NE. It is about 32 km long, and goes across the major faults of the Red River fault system. MT data were applied 2-D inversion to obtain a electrical cross-section for the first three kilometers of the crust. This electrical cross-section, a density cross-section obtained by modeling of gravity data collected along the same profile, and information derived from holes drilled in the vicinity of the profile, both were used to construct a geological section of the study area. In the region of the Saigon River fault, the magnetotelluric profile is about 15 km long. It goes across the supposed location of the fault. The electrical structure of the first three kilometers of the crust was determined by 2-D inversion of data for periods which are not affected by the equatorial electrojet (< 0.7 s). The electrical cross-section obtained allowed us to propose a new location for the Saigon River fault; it corresponds to the boundary between a resistant domain, the block of Da Lat in the north-east, and a less resistant domain, the block of Can Tho in the south-west. This new location is about 2.2 km southwest of the location currently assumed for this fault. In West Africa, we have shown that electromagnetic impedances derived using day time data are affected by the equatorial electrojet for the whole range of period studied (> 120 s), so these data have not been used to determine the electrical structure of the crust and the upper mantle. The 2-D inversion of nighttime data shows the presence of a subvertical structure, relatively conductive, which separates the West African Craton which is very resistant from the geological structures beneath the Senegal River basin
Chen, Chia-Hung, i 陳佳宏. "Ionospheric Equatorial Ionization Anomaly and Equatorial Electrojet". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/56cpwm.
Pełny tekst źródła國立中央大學
太空科學研究所
94
Many studies show seasonal variations of equatorial ionization anomaly (EIA). In this thesis, the ionospheric total electron content (TEC) in the Asian sector derived from measurements of ground-based receivers of the global positioning system (GPS) is employed to investigate the EIA variations during 1997-2005. In addition, magnetometer data from the Circum-pan Pacific Magnetometer Network (CPMN) are used to study the EIA variations associated with the equatorial electrojet (EEJ). It is found in both the northern and southern hemispheres that the EIA crests manifest remarkable seasonal variations. The EIA maxima lag those of the EEJ by about 1.5-3 hours. The results reveal the time delay of both hemispheres to be asymmetry and vary with seasons. There are obvious relations between the intensity of EEJ and EIA as well as distance between the two crests. The associated correlation coefficients are about 0.52. However, no obvious seasonal and solar activity effects are found between the two observations.
Tsai, Her-Chan, i 蔡和展. "On the Relationship between Equatorial Electrojet and Ionospheric Scintillation measured by FORMOSAT-3/COSMIC". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/n5k36y.
Pełny tekst źródła國立中央大學
太空科學研究所
97
In the day time equatorial ionosphere, there has been often observed a strong eastward current which is called Equatorial Electro-Jet (EEJ). According to the Ampere’s law, the current can induce the magnetic variations in its surroundings. Therefore scientists use magnetic observatories to measure the changes of magnetic field caused by EEJ and study the morphology of Equatorial electrojet. This thesis used the magnetic observatories’ data of International Real-time Magnetic Observatory Network to study the variations of magnetic field caused by Equatorial electrojet. Then we compared the Equatorial electrojet with ionosphere scintillations (represented by S4 values) detected by the FORMOSAT-3 satellites. The main task of this thesis consists of two parts. The first part is to study the morphology of EEJ, while the second part deals with the comparisons between EEJ and ionospheric scintillations. The main purpose of this thesis is using 2007 data sets to study the relationship between EEJ and the magnetic field variations affected by the EEJ under the following conditions: during the days of equinox and solstice; during 10 quiet days near the spring equinox; quiet times during the spring season; and on the May 23 storm day. From analyses of the magnetic field variations affected by EEJ, we found that there existed a seasonal variation in the morphology of EEJ. The seasonal (2007 spring) average location of EEJ is during 9 to 14 LT and ranges from the magnetic latitude 2o N to 3.15o S, while the maximum induced ∆H was about 116 nT. From the statistical comparison between EEJ and scintillation we have the following results: on spring equinox day positive correlation was found between their intensities; 10 days’ and seasonal averages reveal that stronger scintillations occurred near the boundary of EEJ. Moreover, from the comparison of the observations on storm day and quiet days we have the following findings: on storm day the EEJ current has changed it’s direction from that of quiet day pattern; and the average S4 is generally increased in the storm time EEJ region. Both EEJ and ionosphere scintillation change coherently when they have magnitude variations.
Mays, Mona Leila. "The study of interplanetary shocks, geomagnetic storms, and substorms with the WINDMI model". 2009. http://hdl.handle.net/2152/10703.
Pełny tekst źródłatext
Książki na temat "Equatorial electrojetc"
The equatorial electrojet. Amsterdam: Gordon and Breach, 1997.
Znajdź pełny tekst źródłaOnwumechikli, CAgodi. Equatorial Electrojet. CRC Press LLC, 2019.
Znajdź pełny tekst źródłaOnwumechikli, CAgodi. Equatorial Electrojet. CRC Press LLC, 2019.
Znajdź pełny tekst źródłaOnwumechikli, CAgodi. Equatorial Electrojet. CRC Press LLC, 2019.
Znajdź pełny tekst źródłaOnwumechikli, C. Agodi. Equatorial Electrojet. CRC, 1998.
Znajdź pełny tekst źródłaOnwumechikli, CAgodi. Equatorial Electrojet. CRC Press LLC, 2019.
Znajdź pełny tekst źródłaCzęści książek na temat "Equatorial electrojetc"
Bhattacharyya, Archana. "Equatorial Electrojet". W Encyclopedia of Solid Earth Geophysics, 1–3. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10475-7_155-1.
Pełny tekst źródłaBhattacharyya, Archana. "Equatorial Electrojet". W Encyclopedia of Solid Earth Geophysics, 294–96. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_155.
Pełny tekst źródłaBhattacharyya, Archana. "Equatorial Electrojet". W Encyclopedia of Solid Earth Geophysics, 372–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58631-7_155.
Pełny tekst źródłaReddy, C. A. "The Equatorial Electrojet". W Quiet Daily Geomagnetic Fields, 485–508. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-9280-3_11.
Pełny tekst źródłaOnwumechili, C. A., i P. C. Ozoemena. "Subsolar Elevation of the Equatorial Electrojet". W Quiet Daily Geomagnetic Fields, 509–14. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-9280-3_12.
Pełny tekst źródłaMoldwin, Mark B., i Justin S. Tsu. "Stormtime Equatorial Electrojet Ground-Induced Currents". W Ionospheric Space Weather, 33–40. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118929216.ch3.
Pełny tekst źródłaDoumbia, Vafi, i Oswald Didier Franck Grodji. "On the Longitudinal Dependence of the Equatorial Electrojet". W Ionospheric Space Weather, 115–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781118929216.ch10.
Pełny tekst źródłaGregori, G. P., L. J. Lanzerotti, B. Alessandrini, G. Defranceschi i R. Clpollone. "The Planetary Scale Distribution of Telluric Currents and the Effect of the Equatorial Electrojet: An Investigation by Canonical GDS". W Electrical Properties of the Earth’s Mantle, 369–92. Basel: Birkhäuser Basel, 1987. http://dx.doi.org/10.1007/978-3-0348-7373-4_9.
Pełny tekst źródłaFukushima, Naoshi. "Contribution to Geomagnetic Sq-Field and Equatorial Electrojet from the Day/Night Asymmetry of Ionospheric Current under Dawn-to-Dusk Electric Field of Magnetospheric Origin". W Quiet Daily Geomagnetic Fields, 437–46. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-9280-3_8.
Pełny tekst źródłaOnwumechili, C. Agodi. "Major Background Phenomena". W The Equatorial Electrojet, 1–99. Routledge, 2019. http://dx.doi.org/10.1201/9780203756706-1.
Pełny tekst źródłaStreszczenia konferencji na temat "Equatorial electrojetc"
Onwumechili, C. Agodi. "Equatorial electrojet phenomenon". W Basic space science. AIP, 1992. http://dx.doi.org/10.1063/1.41725.
Pełny tekst źródłaFreire, L., S. R. Laranja i L. Benyosef. "Geomagnetic Field Variations in the Equatorial Electrojet Sector". W Simpósio Brasileiro de Geofísica. Sociedade Brasileira de Geofísica, 2016. http://dx.doi.org/10.22564/7simbgf2016.041.
Pełny tekst źródłaM. Denardini, Clezio, Mangalathayil A. Abdu i José H.A. Sobral. "Observed Auroral Electric Field Modulation In The Equatorial Electrojet". W 7th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.217.431.
Pełny tekst źródłaUlugergerli, E. U., S. L. Fontes, R. M. Carvalho, C. R. Germano i A. Carrasquilla. "Magnetotelluric response estimates under the equatorial electrojet in Brazil". W 12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15-18 August 2011. Society of Exploration Geophysicists and Brazilian Geophysical Society, 2011. http://dx.doi.org/10.1190/sbgf2011-041.
Pełny tekst źródłaGrodji, F. O., V. Doumbia i K. Boka. "Study of the equatorial electrojet starting from the electrodynamics parameters of the equatorial ionosphere". W 2011 XXXth URSI General Assembly and Scientific Symposium. IEEE, 2011. http://dx.doi.org/10.1109/ursigass.2011.6050987.
Pełny tekst źródłaXu, Zhaohui, Zhengwen Xu i Haisheng Zhao. "Numerical Simulation of Two-stream Instability Induced by Equatorial Electrojet". W 2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE). IEEE, 2018. http://dx.doi.org/10.1109/isape.2018.8634289.
Pełny tekst źródłaH. Kulkarni, V., i P. Muralikrishna. "Uplifting of the equatorial electrojet currents by the meteoric dust". W 8th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.168.arq_2010.
Pełny tekst źródłaYizengaw, E., E. Zesta, M. B. Moldwin, B. Damtie, A. Mebrahtu, F. Anad, R. F. Pfaff, C. M. Biouele i M. Hartinger. "Observations of ULF wave related equatorial electrojet and density fluctuations". W 2011 XXXth URSI General Assembly and Scientific Symposium. IEEE, 2011. http://dx.doi.org/10.1109/ursigass.2011.6051167.
Pełny tekst źródłaRijo, L. "The Effects of the Onwumechillian Equatorial Electrojet Model on MT Soundings". W 3rd International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609-pdb.324.1441.
Pełny tekst źródłaSilva*, Marcos Welby Correa, i Luiz Rijo. "MT modeling of a 2-D structure perpendicular to the Equatorial Electrojet". W 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/sbgf2005-039.
Pełny tekst źródłaRaporty organizacyjne na temat "Equatorial electrojetc"
Otani, N., C. Seyler i M. Kelley. Simulational studies of the Farley-Buneman in the equatorial electrojet. Office of Scientific and Technical Information (OSTI), lipiec 1995. http://dx.doi.org/10.2172/86924.
Pełny tekst źródłaN. OTANI, C. SEYLER, M. KELLEY i R. SUDAN. SIMULATION STUDIES OF THE FARLEY-BUNEMAN INSTABILITY IN THE EQUATORIAL ELECTROJET. Office of Scientific and Technical Information (OSTI), lipiec 2000. http://dx.doi.org/10.2172/764195.
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