Title : Observations of the vertical and zonal ionospheric plasma drift

Title : Observations of the vertical and zonal ionospheric plasma drift velocities, obtained by
ionosondes and incoherent scatter radar at the Brazilian and Peruvian sectors of geomagnetic
longitude
Session: S5: Low and mid latitude Aeronomy and Electrodynamics
Preferred type of presentation: Oral
Abstract:
The studies presented in this work show the vertical and zonal drift velocity time series that
were obtained in two periods of observation in October and November, 2002, during the
COPEX campaign. Three instruments provided the data: two Digisondes (DPS-4 type), one
located at Cachimbo (9.5°S, 54.8°W, dip -4.25°), Brazil, other one located at the Jicamarca Radio
Observatory (11.95°S, 76.87°W, dip ~ 1°), where operates the third instrument used, the
Incoherent Scatter Radar. The values of the vertical velocity measurements at the two
longitude sectors, Jicamarca (JIC) and Cachimbo (CAC), presented very reasonable
correlation, around sunset/evening hours, during moderate magnetic activity. Our results show
that the Digisonde drift velocity local time variation, for both the vertical and zonal components,
follows the same behavioral trends as those from the ISR measurements, during most of the
nighttime hours, as well as part of the afternoon and sunrise hours. It motivates us to use the
zonal velocity of the ionospheric plasma (driven by vertical dynamo electric fields) obtained by
Digisondes, in order to further discuss the behavior of zonal and vertical plasma drifts, for
quiescent and disturbed magnetic and solar activity periods.
Authors:
Presentator
Name
Email
Institution
1
Fernando C. P. Bertoni
[email protected]
CRAAM/UPM
0
Mangalathayil Ali Abdu
[email protected]
Instituto Nacional de
Pesquisas Espaciais, Sao
Jose dos Campos, SP, Brazil
0
Inez Staciarini Batista
[email protected]
Instituto Nacional de
Pesquisas Espaciais, Sao
Jose dos Campos, SP, Brazil
0
Jean-Pierre Raulin
[email protected]
Centro de Radio Astronomía e
Astrofísica Mackenzie
0
Bodo W. Reinisch
[email protected]
UMLCAR
0
Jose Sobral
[email protected]
Instituto Nacional de
Pesquisas Espaciais, Sao
Jose dos Campos, SP, Brazil
0
Jonas Rodrigues de Souza
[email protected]
Instituto Nacional de
Pesquisas Espaciais, Sao
Jose dos Campos, SP, Brazil
Fecha: 17/03/2014
Hora: 15:20:46