RESPONSE OF VENUS IONS TO SOLAR-WIND DYNAMIC PRESSURE

Citation
Ho. Upadhyay et Kk. Mahajan, RESPONSE OF VENUS IONS TO SOLAR-WIND DYNAMIC PRESSURE, Earth, moon, and planets, 74(3), 1997, pp. 215-222
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics","Geosciences, Interdisciplinary
Journal title
ISSN journal
0167-9295
Volume
74
Issue
3
Year of publication
1997
Pages
215 - 222
Database
ISI
SICI code
0167-9295(1997)74:3<215:ROVITS>2.0.ZU;2-P
Abstract
Orbiter ion mass spectrometer measurements, as available in the UADS d ata files are used to study the response of dayside Venus ions at vari ous altitudes to solar wind dynamic pressure, P-SW. Ion densities belo w about 200 km are not affected by changes in P-SW. At altitudes above 200 km the ions get abruptly depleted with increase in P-SW, and this abrupt depletion occurs at lower altitudes when P-SW is high. At lowe r P-SW, the depletion occurs at higher altitudes. The effect is simila r for all ions. These results are also compared with the empirical rel ationship observed by Brace et al. (1980) between the ionopause altitu de and P-SW from electron density measurements on orbiter electron tem perature probe.