On the response of the equatorial and low latitude ionospheric regions in the Indian sector to the large magnetic disturbance of 29 October 2003

Manju, G. ; Kumar Pant, T. ; Ravindran, S. ; Sridharan, R. (2009) On the response of the equatorial and low latitude ionospheric regions in the Indian sector to the large magnetic disturbance of 29 October 2003 Annales Geophysicae, 27 (6). pp. 2539-2544. ISSN 0992-7689

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Official URL: http://www.ann-geophys.net/27/2539/2009/angeo-27-2...

Related URL: http://dx.doi.org/10.5194/angeo-27-2539-2009

Abstract

The present paper investigates the response of the equatorial and low latitude ionosphere over the Indian longitudes to the events on 29 October 2003 using ionosonde data at Trivandrum (8.5° N (0.5° N geomagnetic), 77° E) and SHAR (13.7° N (5.7° N geomagnetic), 80.2° E), groundbased magnetometer data from Trivandrum and Total Electron Content (TEC) derived from GPS data at the locations of Ahmedabad (23° N (15° N geomagnetic), 72° E), Jodhpur (26.3° N (18.3° N geomagnetic), 73° E) and Delhi (28° N (20° N geomagnetic), 77° E). Following the storm sudden commencement, the TEC at all the three stations showed an overall enhancement in association with episodes of interplanetary electric field penetration. Interestingly, real ionospheric height profiles derived using the ionosonde data at both Trivandrum and SHAR showed significant short-term excursions and recoveries. In the post noon sector, these features are more pronounced over SHAR, an off equatorial station, than those over Trivandrum indicating the increased effects of neutral winds.

Item Type:Article
Source:Copyright of this article belongs to Copernicus Group.
Keywords:Ionosphere (Equatorial Ionosphere; Ionospheric Disturbances; Mid-latitude Ionosphere)
ID Code:89692
Deposited On:30 Apr 2012 15:03
Last Modified:19 May 2016 04:10

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