World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Investigation of the Response Time of the Equatorial Ionosphere in Context of the Equatorial Electrojet and Equatorial Ionization Anomaly : Volume 29, Issue 7 (19/07/2011)

By Jose, L.

Click here to view

Book Id: WPLBN0003987875
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Investigation of the Response Time of the Equatorial Ionosphere in Context of the Equatorial Electrojet and Equatorial Ionization Anomaly : Volume 29, Issue 7 (19/07/2011)  
Author: Jose, L.
Volume: Vol. 29, Issue 7
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Vineeth, C., Pant, T. K., Ravindran, S., Alex, S., & Jose, L. (2011). Investigation of the Response Time of the Equatorial Ionosphere in Context of the Equatorial Electrojet and Equatorial Ionization Anomaly : Volume 29, Issue 7 (19/07/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India. Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two large-scale processes in the equatorial/low latitude ionosphere, driven primarily by the eastward electric field during daytime. In the present paper we investigate the correlation between the Integrated EEJ strength (IEEJ) and the EIA parameters like the total electron content at the northern crest, location of crest in Magnetic latitude and strength of the EIA for the Indian sector. A good correlation has been observed between the IEEJ and EIA when a time delay is introduced between IEEJ and EIA parameters. This time delay is regarded as the response time of equatorial ionosphere in context of the evolution of EIA vis-à-vis EEJ. Further, a seasonal variation in the time delay has been observed, which is believed to be due to changes in thermospheric wind. Using the response time and the linear relationship obtained, the possibility of near-real time prediction of EIA parameters has been attempted and found that the prediction holds well during the geomagnetically quiet periods. The paper discusses these aspects in detail.

Summary
Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly

Excerpt
Abdu, M. A., Walker, G. O., Reddy, B. M., Sobral, J. H. A., Fejer, B. G., Kikuchi, T., Trivedi, N. B., and Szuszczewicz, E. P: Electric field versus neutral wind control of the equatorial anomaly under quiet and disturbed condition: A global perspective from SUNDIAL 86, Ann. Geophys., 8, 419–430, 1990.; Anderson, D. N.: A theoretical study of the ionospheric F-region equatorial anomaly I., Planet. Space Sci., 21, 409–419, 1973a.; Anderson, D. N.: A theoretical study of the ionospheric F-region equatorial anomaly II. Results in the American and Asian sectors, Planet. Space Sci., 21, 421–442, 1973b.; Appleton, E. V.: Two anomalies in the ionosphere, Nature, 157, 691–693, 1946.; Balan, N. and Iyer, K. N.: Equatorial anomaly in ionospheric electron content and its relation to dynamo currents, J. Geophys. Res., 88, 10259–10262, 1983.; Deshpande, M. R., Rastogi, R. G., Vats, H. O., Klobuchar, J. A., Sethia, G., Jain, A. R., Subbarao, B. S., Patwari, V. M., Janve, A. V., Rai, R. K., Singh, Malkiat, Gurm, H. S., and Murthy, B. S: Effect of electrojet on the TEC of the ionosphere over India subcontinent, Nature, 267, 599–600, 1977.; Dunford, E.: The relationship between the ionospheric equatorial anomaly and the E-region current system, J. Atmos. Terr. Phys., 29, 1489–1498, 1967.; Forbes, J. M.: The equatorial electrojet, Rev. Geophys. Space Phys., 19, 469–504, 1981.; Huang, Y.-N., Cheng, K., and Chen, S.-W.: On the equatorial anomalyof the ionospheric total electron content near the Northern Anomaly Crest Region, J. Geophys. Res., 94, 515–525, 1989.; Klobuchar, J. A.: Ionospheric Effects on GPS, vol. 2, Progress in Astronautics and Aeronautics, 1996.; Martyn, D. F.: Atmospheric tides in the ionosphere – I. Solar tides in the F2 region, Proc. Roy. Soc. London A, 189, 241–260, 1947.; Mitra, S. K.: Geomagnetic control of region F2 of the ionosphere, Nature, 158, 668–669, 1946.; Raghavarao, R., Sharma, P., and Sivaraman, M. R.: Correlation of ionization anomaly with the intensity of electrojet, Space Res., 18, 277–280, 1978.; Rama Rao, P. V. S., Gopi Krishna, S., Niranjan, K., and Prasad, D. S. V. V. D.: Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity period of 2004–2005, Ann. Geophys., 24, 3279–3292, <a href=http://dx.doi.org/10.5194/angeo-24-3279-2006>doi:10.5194/angeo-24-3279-2006, 2006.; Rastogi, R. G.: The Diurnal Development of the Anomalous Equatorial Belt in the F2 Region of the Ionosphere, J. Geophys. Res., 64, 727–732, 1959.; Rastogi, R. G. and Klobuchar, J. A.: Ionospheric electron content within the equatorial F2 layer anomaly belt, J. Geophys. Res., 95, 045–052, 1990.; Rastogi, R. G. and Rajaram, G.: Electrojet effects on the equatorial F-region during magnetically quiet and disturbed days, Ind. J. Pure Appl. Phys., 9, 531–536, 1971.; Reddy, C. A.: The equatorial electrojet, Pageoph., 131, 485–508, 1989.; Richmond, A. D.: Modeling the ionospheric wind dynamo: A review, Pageoph., 131, 413–435, 1989.; Rush, C. M. and Richmond, A. D.: The relationship between the structure of the equatorial anomaly and the strength of the equatorial electrojet, J. Atmos. Terr. Phys., 35, 1171–1180, 1973.; Sastri, J. H.: The relationship between the structure of the equatorial anomaly and the strength of the equatorial electrojet, Ind. J. Radio Space Phys., 19, 225–240, 1990.; Stolle, C., Manoj, C., Lühr, H., Maus, S., and Alken, P.: Estimating the daytime Equatorial Ionization Anomaly strength from electric field proxies, J. Geophys. Res., 113, A09310, <a href=http://dx.doi.org/10.1029/2007JA012781>doi:10.1029/2007JA012781, 2008.


 

Click To View

Additional Books


  • The Sunspot Cycle, the Qbo, and the Tota... (by )
  • Characteristics of Episodes with Extreme... (by )
  • The Shape of the Sq Current System : Vol... (by )
  • Modelling Long-term Trends in Lunar Expo... (by )
  • A Procedure to Correct the Effects of a ... (by )
  • Plasma Convection Jets Near the Poleward... (by )
  • Polar Cap Influx : Volume 23, Issue 5 (2... (by )
  • Predicting Storm-time Thermospheric Mass... (by )
  • Coastal Upwelling Along the Southwest Co... (by )
  • Faith in a Seed: on the Origins of Equat... (by )
  • Energy Time Dispersion of a New Class of... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.