Computer Science – Sound
Scientific paper
Apr 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jgra..11704308f&link_type=abstract
Journal of Geophysical Research, Volume 117, Issue A4, CiteID A04308
Computer Science
Sound
Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Ionospheric Disturbances, Ionosphere: Ionospheric Dynamics, Ionosphere: Ionospheric Irregularities
Scientific paper
An atypical nighttime spread-F structure is observed on ionograms at or above the F2 trace, near the crest of the ionospheric equatorial ionization anomaly (EIA) region. This ionospheric atypical spread-F phenomenon was observed using two closed spaced (∼115 km) ionospheric soundings stations located in Sao Jose dos Campos (23.21°S, 45.97°W) and Cachoeira Paulista (22.70°S, 45.01°W), Brazil, in a low-latitude station (near the southern crest of the EIA region), during nighttime, low solar activity, and quiet geomagnetic conditions. This structure, in the initial phase, appears in the ionogram as a faint spread-F trace above or at the F2-layer peak height. After a few minutes, it develops into a strong spread-F trace, and afterwards, it moves to altitudes below the F2-layer peak heights. Finally, the atypical nighttime F-layer trace structure may remain for a while between the F-layer bottom side and peak height or can move to an altitude above the F-layer peak height, and then it disappears. In order to have a comprehensive view of the ionospheric environment characterizing the phenomenon under study, complementary data from six GPS station were used to investigate the ionosphere environment conditions, during both events. The six GPS stations used in this study are distributed from near the equatorial region to low latitudes and provide evidence that the atypical nighttime spread-F structures are not related with large scale equatorial irregularities (plasma bubbles).
Abalde José Ricardo
Abdu Mangalathayil Ali
Amorim C. M. D.
Bittencourt J. A.
de Abreu A. J.
No associations
LandOfFree
Atypical nighttime spread-F structure observed near the southern crest of the ionospheric equatorial ionization anomaly does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Atypical nighttime spread-F structure observed near the southern crest of the ionospheric equatorial ionization anomaly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atypical nighttime spread-F structure observed near the southern crest of the ionospheric equatorial ionization anomaly will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1118878