Physics
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011adspr..48..207s&link_type=abstract
Advances in Space Research, Volume 48, Issue 2, p. 207-217.
Physics
Scientific paper
The pre-storm behavior of NmF2 and TEC over an equatorial station, Trivandrum (8.47°N, 76.91°E, dip 0.6°S) and a low latitude station, Waltair (17.7°N,83.3°E, dip 20°N) has been studied for a total of 18 strong geomagnetic storms with DST ⩽ -100 nT. The simultaneous measurements of GPS-TEC and NmF2 over Trivandrum and Waltair during the period 2000-2005 have been considered for the present study. It is found that there is a substantial increase in NmF2 and TEC before the onset of the storm over Waltair, while the increase is not present at Trivandrum. The origin of pre-storm enhancements in electron density still remains unresolved owing to several conditions in their potential sources and occurrence mechanisms. In the present study an attempt is made to identify the possible mechanisms responsible for such enhancements in electron density of the F-region.
Niranjan Kandula
Prasad S. V. V. D. D.
Rama Rao V. S. P.
Saranya P. L.
Venkatesh K.
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