Computer Science – Sound
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.7689a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, May 1, 1991, p. 7689-7695. CNPq-supported research.
Computer Science
Sound
10
Equatorial Atmosphere, Ionospheric Electron Density, Plasma Bubbles, Spread F, Brazil, Rocket Sounding
Scientific paper
In situ measurement of electron density height profile of the equatorial nighttime ionosphere, under a developing spread F event, was carried out using a dual-mode high-frequency capacitance (HFC) probe that was flown on board a SONDA-III rocket launched from Natal on December 11, 1985. This represents the first measurement of plasma bubble characteristics using an HFC probe. A series of plasma bubbles in varying degrees of their growth phase was detected mostly during the upper leg of the flight. A discussion, and comparative studies, of the measurements at the two probe frequencies (6.17 MHz and 11.75 MHz) are presented. Among the important findings is an evidence of electron temperature enhancement in the plasma bubble, possibly caused by electron heating from energetic particle precipitation in the South Atlantic magnetic anomaly.
Abdu Mangalathayil Ali
Batista Inez S.
Muralikrishna P.
Sobral José Humberto A.
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