%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3ETL868
%@archivingpolicy denypublisher denyfinaldraft24
%3 1-s2.0-002191699190124P-main (1).pdf
%X Using a new mode of scanning 630-nm photometer operation the zonal velocities of ionospheric plasma depletions were measured over Cachoeira Paulista in Brasil in two east-west planes tilted 30°N and 30°S with respect to zenith. The measurements cover a time period of approximately 2 years, from January 1988 to January 1990, a period marked by significant increase in solar activity of the ongoing cycle. The results have permitted a rather detailed evaluation of the local time and latitude variations in the zonal plasma bubble velocity as a function of solar activity. Although the mean trend in the velocity local time variation is a decrease from early evening to post-midnight hours, a strong tendency for velocity peak is observed near 21 LT and midnight. The velocities as well as their height (latitude) gradients show perceivable increases with solar activity represented as sunspot numbers. The present results are compared with the ambient plasma velocities measured using the Jicamarca radar by Fejer et al. (1985) J. Geophys. Res.90,12249, with that measured on board the DE 2 satellite on the equatorial latitudes by Coley and Heelis (1989), J. Geophys. Res.94, 6751, and with various theoretical calculations, in an attempt to bring out the salient features of the plasma dynamics of the equatorial ionosphere.
%8 Aug.
%N 8
%@secondarydate 19960312
%T Solar activity effects on equatorial plasma bubble zonal velocity and its latitude gradient as measured by airglow scanning photometers
%@electronicmailaddress jsobral@dae.inpe.br
%K solar activity, equatorial plasma bubble, zonal velocity, airglow.
%@secondarytype PRE PI
%@usergroup administrator
%@usergroup banon
%@usergroup jefferson
%@group DAE-INPE-BR
%@secondarykey INPE-5705-PRE/1866
%F 7100
%@issn 1364-6826
%2 sid.inpe.br/iris@1905/2005/07.29.00.46.16
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@project CNPq (300669.89.5; 40308-88); FAPESP (87/3585-3; 89/0093-8).
%B Journal of Atmospheric and Solar-Terrestrial Physics
%@versiontype publisher
%P 729-742
%4 sid.inpe.br/iris@1905/2005/07.29.00.46
%@documentstage not transferred
%D 1991
%V 53
%A Sobral, Jose Humberto Andrade,
%A Abdu, Mangalathayil Ali,
%@dissemination WEBSCI; PORTALCAPES; COMPENDEX.
%@area CEA