Multi-station observation of ionospheric disturbance of March 9 2012 and comparison with IRI-model

Adebesin, B.O. and Ikubanni, S.O. and Adebiyi, S.J. and Joshua, B.W. (2013) Multi-station observation of ionospheric disturbance of March 9 2012 and comparison with IRI-model. Advances in Space Research, 52 (4). pp. 604-613. ISSN 02731177

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The magnetic storm of 9 March 2012 is a single step intense storm (Dst = -�143 nT) whose main phase begins around 0100 UT and lasted for almost 11 h. The increases in NmF2 recorded 33% and 67% incidence respectively during the main and the recovery phase of the storm at the stations considered. The increase in hmF2 occurred concurrently with the increase in thickness parameter B0 between 0000 and 1100 UT, and a simultaneous decrease in the shape parameter B1 for the entire mid-latitude stations. Generally, B1 responded to the storm with a decrease away from the quiet day average, and decreased simultaneously with the increase in NmF2. B0 displays higher variability magnitude during daytime than the nighttime period. The occasional differences in the response of the ionospheric parameters to the storm event are attributed to longitudinal differences. Variation in hmF2 and NmF2 is projected to change in B1, but the rationale behind this effect on B1 is still not known and therefore left open. The two IRI options over-estimate the observed values with that of URSI higher than CCIR. The over-estimation was higher during the nighttime than the daytime for NmF2 response for the mid-latitude stations and the reverse for the equatorial station. A fairer fit of the model with the observed for all parameters over Jicamarca suggests that equatorial regions are better represented on the model. Extensive study of B1 and B0 is recommended to arrive at a better performance of IRI.

Item Type: Article
Subjects: Q Science > QC Physics
Depositing User: Dr S. O. Ikubanni
Date Deposited: 18 Jun 2014 06:28
Last Modified: 18 Jun 2014 06:28

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