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Characteristics of the Ionospheric Total Electron Content of the Equatorial Ionization Anomaly in the Asian-australian Region During 1996–2004 : Volume 27, Issue 10 (12/10/2009)

By Biqiang Zhao

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Book Id: WPLBN0003980866
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Characteristics of the Ionospheric Total Electron Content of the Equatorial Ionization Anomaly in the Asian-australian Region During 1996–2004 : Volume 27, Issue 10 (12/10/2009)  
Author: Biqiang Zhao
Volume: Vol. 27, Issue 10
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Liu, L., Ren, Z., Zhao, B., & Wan, W. (2009). Characteristics of the Ionospheric Total Electron Content of the Equatorial Ionization Anomaly in the Asian-australian Region During 1996–2004 : Volume 27, Issue 10 (12/10/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China. Ionospheric total electron content (TEC) of the equatorial ionization anomaly (EIA) is studied by analyzing dual-frequency signals of the Global Position System (GPS) acquired from a network of receivers around the Asian-Australian region during 1996–2004. The latitude, occurrence time, strength of the most developed EIA crest, and crest-to-trough ratio (CTR) for both the noon and post-sunset sector obtained from a daily TEC contour map have been used to study the solar cycle variations of EIA in the Asian-Australian region. The results reveal that semiannual and seasonal variations were the dominant factor that controls the morphology of the EIA structure which can be identified in the past studies (e.g. Wu et al., 2008). It is also found that the latitude and local time position of the anomaly crest show a hemispheric asymmetry because (a) The northern crest of EIA is expanded during the equinox indicating a weak semiannual variation while the southern crest is inhibited during June–August presenting a strong seasonal variation, and (b) The local time of the northern crest appears ~1.3 h earlier than that of the southern crest in June while showing no difference at December. Solar activity dependence is more evident in the EIA crest region than in the EIA trough region and least in the post-sunset sector at equinox. A seasonal linear relationship is derived between the post-sunset CTR and solar flux, which should be caused by the solar-dependant equatorial E×B vertical drift.

Summary
Characteristics of the ionospheric total electron content of the equatorial ionization anomaly in the Asian-Australian region during 1996–2004

Excerpt
Abdu, M. A.: Equatorial ionosphere–thermosphere system: Electrodynamics and irregularities, Adv. Space Res., 35, 771–787, 2005.; Alken, P. and Maus, S.: Spatio-temporal characterization of the equatorial electrojet from CHAMP, Ørsted, and SAC-C satellite magnetic measurements, J. Geophys. Res., 112, A09305, doi:10.1029/2007JA012524, 2007.; Basu, B., Retterer, J. M., de La Beaujardière, O., Valladares, C. E., and Kudeki, E.: Theoretical relationship between maximum value of the postsunset drift velocity and peak-to-valley ratio of anomaly TEC, Geophys. Res. Lett., 31, L03807, doi:10.1029/2003GL018725, 2004.; Breed, A. M.: Investigation of the ionosphere over Australia using satellite transmissions, PhD thesis, School of Applied Physics, University of South Australia, 1996.; Burrage, M., Hagan, M., Skinner, W., Wu, D., and Hays, P.: Long-Term Variability in the Solar Diurnal Tide Observed by HRDI and Simulated by the GSWM, Geophys. Res. Lett., 22, 2641–2644, 1995.; Dabas, R. S., Singh, L., Garg, S., Das, R. M., Sharma, K., and Vohra, V. K.: Growth and decay of a post-sunset equatorial anomaly at low latitudes: Control of $\vecE\times\vecB$, neutral winds and daytime electrojet strength, J. Atmos. Sol. Terr. Phys., 68, 1622–1632, 2006.; Fejer, B. G.: Low latitude electrodynamic plasma drifts: a review, J. Atmos. Terr. Phys., 53, 677–693, 1991.; Fejer, B. G., de Paula, E., González, S., and Woodman, R.: Average Vertical and Zonal F Region Plasma Drifts Over Jicamarca, J. Geophys. Res., 96, 13901–13906, 1991.; Fesen, C. G., Growley, G., and Roble, R. G.: Ionospheric effects at low latitudes during the March 22, 1979, geomagnetic storm, J. Geophys. Res., 94, 5405–5417, doi:10.1029/JA094iA05p05405, 1989.; Forbes, J. M.: The equatorial electrojet, Rev. Geophys. Space Phys. 19, 469–504, 1981.; Golton, E. and Walker, G. O.: Observations of ionospheric electron content across the equatorial anomaly at sunspot minimum, J. Atmos. Terr. Phys., 33, 1–11, 1971.; Heelis, R. A.: Electrodynamics in the low and middle latitude ionosphere: a tutorial, J. Atmos. Sol. Terr. Phys., 66, 825–838, 2004.; Huang, Y.-N. and Cheng, K.: Solar cycle variations of equatorial ionospheric anomaly in total electron content in the Asian region, J. Geophys. Res., 101, 24513–24520, 1996.; Jakowski, N., Sardon, E., Engler, E., Jungstand, A., and Kl�hn, D.: Relationships between GPS-signal propagation errors and EISCAT observations, Ann. Geophys., 14, 1429–1436, 1996.; Klobuchar, J. A.: Ionospheric effects on GPS, in: Global Positioning System: Theory and application Vol. 1, edited by: Parkinson, B. W. and Spilker, J. J., American Institute of Aeronautics and Astronautics INC., 1996.; Klobuchar, J. A.: Ionospheric effects on GPS, GPS World, 48–51, 1991.; Lanyi, G. E. and Rolh, T.: A comparison of mapped and measured total ionospheric electron content using global positioning system and beacon satellite observations, Radio Sci., 23, 483–492, 1988.; Liu, H., Stolle, C., Förster, M., and Watanabe, S.: Solar activity dependence of the electron density in the equatorial anomaly regions observed by CHAMP, J. Geophys. Res., 112, A11311, doi:10.1029/2007JA012616, 2007.; Mendillo, M., Bosheng, L., and Aarons, J.: The application of GPS observations to equatorial aeronomy, Radio Sci., 35, 885–904, 2000.; Rishbeth, H.: Thermospheric winds and the F-region: A review, J. Atmos. Terr. Phys., 34, 1–41, 1972.; Rishbeth, H.: How the thermospheric circulation affects the ionospheric F2-layer, J. Atmos. Sol. Terr. Phys., 60, 1385–1402, 1998.; Scherliess, L. and Fejer, B. G.: Radar and satellite global equatorial F region vertical drift model, J. Geophys. Res., 104, 6829–6842, 1999.; Rishbeth, H., Müller-Wodarg, I. C. F., Zou, L., Fuller-Rowell, T. J., Millward, G. H., Moffett, R. J., Idenden, D. W., and Aylward, A. D.: Annual and semiannual variations in the ionospheric F2-layer: II. Physical discussion, Ann. Geophys., 18, 945–956, 2000.; Sardón, E., Rius, A., and Zarraoa, N.: Estimati


 

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