SEMI-ANNUAL VARIATION IN AIR DENSITY AT A HEIGHT OF 1100 KM FROM 1964 TO 1967

被引：10

作者：

COOK, GE

SCOTT, DW

机构：

[1] Royal Aircraft Establishment, Farnborough, Hants

来源：

PLANETARY AND SPACE SCIENCE | 1969年 / 17卷 / 01期

关键词：

D O I：

10.1016/0032-0633(69)90127-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The orbit of Echo 2 is used to derive values of exospheric density at heights near 1100 km during 1967. The results are combined with those from two earlier studies to show the behaviour of the semi-annual variation at solar minimum and throughout the entire rising phase of the current solar cycle. The July minima are consistently deeper than the January minima, while there is no systematic difference between the April and October maxima. It appears that the ratio of the mean maximum density to the mean minimum in the semi-annual variation decreased from about 2.5 in 1964 to about 1.8 (or possibly even lower) in 1966, as the 10.7 cm radiation flux increased from 70 to 120 × 10-22 W m-2 Hz-1, and the ratio then increased slightly to about 2.0 in 1967. © 1969.

引用

页码：107 / &

共 13 条

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PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1963, 275 (1360) :357-+

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Jacchia L. G., 1965, SMITHSONIAN CONTRIBU, V8, P215, DOI [10.5479/si.00810231.8-9.213, DOI 10.5479/SI.00810231.8-9.213]

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