巻号一覧
8 巻, 1 号
選択された号の論文の3件中1～3を表示しています
- |<
- <
- 1
- >
- >|
-
Noboru HOKKYO1956 年 8 巻 1 号 p. 1-8
発行日: 1956年
公開日: 2010/09/14
ジャーナル フリーTheory of plasma oscillation is applied to the problem of the scattering of -1000Mc waves in the E layer of the ionosphere. It is assumed that a region of the ionosphere having an irregular or turbulent character contains “oscillating domains” or “coherent units” in which free electrons perform synchronous oscillations. These domains are shown to be effective in scattering waves of frequencies ∼(c/v) ωp, where ωp is the plasma frequency, v the mean thermal speed of electrons, and c the velocity of light. A rough estimate indicates that the scattered wave may be observable for a proper setup in the experiment, and that its angular dependence is (sin 1/2 0)-1, 0 being the scattering angle.抄録全体を表示PDF形式でダウンロード (882K) -
Motokazu HIRONO, Tai-ichi KITAMURA1956 年 8 巻 1 号 p. 9-23
発行日: 1956年
公開日: 2010/09/14
ジャーナル フリーThe differential equations of the dynamo theory are solved by numerical integration, taking into account of the daily variation of the anisotropic conductivity. It is shown that the observed wind in the E region is sufficient for the requirement of the dynamo theory. The drift of ionization is discussed and it is shown that at night some part of electrons in the lower F region will descend into the E region in the middle latitudes.抄録全体を表示PDF形式でダウンロード (1481K) -
Susumu KATO1956 年 8 巻 1 号 p. 24-37
発行日: 1956年
公開日: 2010/09/14
ジャーナル フリーHorizontal wind systems in the ionospheric E region are deduced from the dynamo theory by using the same total electric field as in Part I. [1] In Part II the effect of the Coriolis force is taken into consideration and a further study is made about the wind motion in the E region. The wind velocity is obtained by solving the equation of motion of the atmosphere for the rotating earth simultaneously with the dynamo equation.
It is shown as in Part I that the diurnal wind motion predominates over the semi-diurnal one in the E region and the semi-diurnal pressure variation is almost in phase with that observed at the ground.
The conspicious differences in the results between Part I and Part II are: (1) The diurnal pressure variation in the E region reaches its maximum value at about 7p.m. local solar time in Part II instead of at 9a.m. as in Part I. (2) Amplification of the semi-diurnal pressure variation in the E region is estimated to be 25-30 at low latitudes in Part II instead of 50 as in Part I.
The vertical drift velocity in the F2 region is calculated by using our wind-systems.
In Appendices the mathematical consideration is given to our treatment.抄録全体を表示PDF形式でダウンロード (1257K)
- |<
- <
- 1
- >
- >|