• 検索結果がありません。

The 3D Distribution of Artificial Aurora Induced by HF Radio Waves in the Ionosphere

N/A
N/A
Info
ダウンロード
Protected

Academic year: 2021

シェア "The 3D Distribution of Artificial Aurora Induced by HF Radio Waves in the Ionosphere"

Copied!
1
0
0

読み込み中.... (全文を見る)

今ダウンロードする ( 1 ページ )

全文

(1)

The 3D Distribution of Artificial Aurora Induced by HF Radio Waves in the Ionosphere

Andreas Kvammen

(1)

, Björn Gustavsson

(1)

, Urban Brändström

(2)

and Juha Vierinen

(1)

(1) University of Tromsø , [email protected]

(2) Swedish Institute of Space Physics

We present new 3D modelling results of artificial aurora in the ionospheric F-layer, induced by high frequency (HF) radio waves from the EISCAT heating facility. Projections of the modelled volume emission distribution were compared to observational images of the artificial aurora, taken simultaneously at four separate ground based imaging stations. The simultaneous multi-station imaging permitted the use of tomographic inversion methods.

The 3D reconstruction of the artificial aurora was done in the green line (5577 Å), the red line

(6300 Å) and for the first time in the infra-red line (8446 Å). Three different auroral

construction techniques were considered, theoretical, semi-theoretical and free parameter

search. The theoretical aurora model was constructed using previously published excitation

rate profiles from numerical simulations of supra-thermal electron energy distributions. The

projections of the semi-theoretical and free parameter search aurora models were in

agreement with the observational images, whereas the projections from the theoretical

aurora model were not. Inspection of the constructed models suggests that the emission

distribution lies within a thinner horizontal layer than predicted by the theoretical excitation

rate profiles. Possible explanations will be discussed.

参照

今ダウンロードする ( PDF - 1 ページ - 32.56 KB )

関連したドキュメント

The Distance-Regular Graphs of Valency Four

This means that finding the feasible arrays for distance-regular graphs of valency 4 was reduced to a finite amount of work, but the diameter bounds obtained were not small enough

4 Construction of the operators for the model

It is suggested by our method that most of the quadratic algebras for all St¨ ackel equivalence classes of 3D second order quantum superintegrable systems on conformally flat

2.1 Heteroclinic waves of the hyperbolic equation

Viscous profiles for traveling waves of scalar balance laws: The uniformly hyperbolic case ∗..

30 1.2 Practical uses of the spectral distribution

[56] , Block generalized locally Toeplitz sequences: topological construction, spectral distribution results, and star-algebra structure, in Structured Matrices in Numerical

The exact asymptotic of the time to collision

Keywords: continuous time random walk, Brownian motion, collision time, skew Young tableaux, tandem queue.. AMS 2000 Subject Classification: Primary:

OF THE GROUP

Answering a question of de la Harpe and Bridson in the Kourovka Notebook, we build the explicit embeddings of the additive group of rational numbers Q in a finitely generated group

(3.) In the statement of the criterion

Then it follows immediately from a suitable version of “Hensel’s Lemma” [cf., e.g., the argument of [4], Lemma 2.1] that S may be obtained, as the notation suggests, as the m A

Specialization of the

In our previous paper [Ban1], we explicitly calculated the p-adic polylogarithm sheaf on the projective line minus three points, and calculated its specializa- tions to the d-th