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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(2) [April 2012] >
| Title: | Evolution of plasma bubbles over Vietnam region observed using the CERTO beacon on board C/NOFS satellite |
| Authors: | Thampi, Smitha V
Yamamoto, Mamoru |
| Keywords: | Equatorial spread-F (ESF) irregularities
Plasma irregularities
Radio beacon signals
Scintillations
Total electron content (TEC) |
| Issue Date: | Apr-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 94.20.dj; 94.20.dt; 94.20.wf |
| Abstract: | Observation
of
evolution of plasma bubbles using the ground based reception of Coherent
Electromagnetic Radio Tomography (CERTO) beacon signals from the
Communications/Navigation Outage Forecasting System (C/NOFS) satellite on 25
January 2009 are presented. These observations are made from Bac Lieu, Vietnam (9.2°N, 105.6°E geographic, 1.7°N magnetic dip
latitude). The
ionosonde observations from Bac Lieu and Chumphon (10.7°N, 99.4°E, 3.3°
magnetic dip latitude) show that there is a well developed equatorial spread-F
(ESF) at 105°E longitude, whereas ESF was absent at 99°E longitude. Hence, the
successive passes of C/NOFS reveal the evolutionary phases of plasma
irregularities over 105°E longitude. This also enables to observe the
corresponding VHF and UHF scintillations at their different phases of evolution
and gives a measure of the spectral evolution of irregularities. The spectral
characteristics obtained from successive passes bring out the signatures of the
cascading process. This example shows the patchy nature of the ESF
irregularities and the longitudinal variability of ESF during the deep solar
minimum period. |
| Page(s): | 233-239 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(2) [April 2012]
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