Esro 4 model of global thermospheric composition and temperatures during times of low solar activity
作者:
U. Zahn,
W. Köhnlein,
K. H. Fricke,
U. Laux,
H. Trinks,
H. Volland,
期刊:
Geophysical Research Letters
(WILEY Available online 1977)
卷期:
Volume 4,
issue 1
页码: 33-36
ISSN:0094-8276
年代: 1977
DOI:10.1029/GL004i001p00033
数据来源: WILEY
摘要:
We present an empirical model of global exospheric temperatures and densities of neutral constituents, based on data from 228 geomagnetically quiet days during the operation of the Esro 4 gas analyzer (mean Ap= 7). By means of an expansion in spherical harmonics the model infers exospheric temperatures from both the measured N2and Ar densities. O and He densities are presented as extrapolated density distributions at 120 km altitude. The Esro 4 model complements the similar Ogo 6 mass spectrometer model with observations at considerably lower altitudes (240‐320 km) and lower levels of solar activity
Inferred exospheric temperatures are typically 5‐9% below Ogo 6 model values for F10.7=
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