Physics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11602307m&link_type=abstract
Journal of Geophysical Research, Volume 116, Issue A2, CiteID A02307
Physics
1
Ionosphere: Equatorial Ionosphere, Ionosphere: Electric Fields (2712), Ionosphere: Ionospheric Irregularities
Scientific paper
The first observations of the duration and spread of equatorial spread F (ESF) at the magnetic equator and their relationship with the L band scintillations in the equatorial ionization anomaly (EIA) region have been presented here. The analysis is done for the equinoctial months of low solar activity period 2005-2006 and the moderate solar activity year 2004. Ionosonde and CRABEX data from Trivandrum and GPS data from four stations in the EIA region centered around 77°E meridian have been used for the study. The results show that the maximum scintillation index (s4) in the EIA region is linearly dependent on the spread of ESF traces for both the equinoxes. The corresponding duration of L band scintillations is also found to be linearly dependent on the duration of ESF at the magnetic equator. Further, the study for the first time reveals the plausible use of the ESF prediction parameter during 1600-1845 IST period for predicting L band scintillations and its inverse relationship with F10.7 cm flux.
Manju G.
Ravindran Sudha
Sreeja V.
Thampi Smitha V.
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