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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.39 [2010] >
IJRSP Vol.39(5) [October 2010] >
| Title: | F-region variability over the anomaly crest region |
| Authors: | Chandra, H
Sharma, Som
Aung, Soe Win |
| Keywords: | Electrojet strength
Ionospheric variabilty
F-region variabilty
Geomagnetic storm
Electron density |
| Issue Date: | Oct-2010 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 94.20.dj |
| Abstract: | Day-to-day
variability in the critical frequency of F-layer (foF2)
over Ahmedabad has been examined. The hourly data for the months of January,
March and July for the high sunspot year 1969 and low sunspot year 1996 have
been analysed to study the variability. Daily variations on different days of
the month, standard deviations and the normalized deviations at each hour have
been studied. The normalized standard deviations are up to ±30% during night hours and up
to ±15%
during day hours. While the variability during day hours is mainly because of
the variability in the electric field (electrojet strength) that gives rise to
vertical drift and subsequent ionization anomaly, the variability during night
hours is also contributed by the variability in thermospheric neutral winds and
temperature. |
| Page(s): | 302-307 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.39(5) [October 2010]
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