Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1777423 | Journal of Atmospheric and Solar-Terrestrial Physics | 2010 | 6 Pages |
Abstract
This study analyzes the TEC data during 1998–2007, observed by the AREQ (16.5°S, 71.5°W) GPS station to investigate the equatorial ionospheric variations under geomagnetic quiet-conditions. The diurnal TEC values generally have a maximum value between 1330 and 1500 LT and a minimum around 0500 LT. For the seasonal variation, the semi-annual variation apparently exists in the daytime TEC with two peaks in equinoctial months. In contrast, this semi-annual variation is not found in the nighttime. Furthermore, the results of the annual variation show that the correlation between the daytime TEC value and the solar activity factor is highly positive.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
C.C. Lee, Y.J. Chuo, F.D. Chu,