Search: onr:"swepub:oai:DiVA.org:uu-97796" >
Ionospheric plasma ...
Ionospheric plasma density irregularities measured by stimulated electromagnetic emission
-
- Norin, Lars (author)
- Uppsala universitet,Astronomi och rymdfysik,Institutet för rymdfysik, Uppsalaavdelningen
-
Grach, S. M. (author)
-
- Leyser, Thomas (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
show more...
-
- Thidé, Bo (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
Sergeev, E. N. (author)
-
Berlin, M. (author)
-
show less...
-
(creator_code:org_t)
- 2008
- 2008
- English.
-
In: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 113:A9, s. A09314-
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- It is well known that ionospheric plasma turbulence can be conveniently generated by controlled injection of powerful high-frequency radio beams from the ground. Irradiation of the ionosphere with such radio waves leads to the formation of plasma density structures, striations, and the generation of secondary electromagnetic radiation, a phenomenon known as stimulated electromagnetic emission (SEE). In this paper we present experimental results of the dependence of SEE on decreasing excitation levels of the striations. In the experiments the frequency of the injected radio beam was varied near the fifth harmonic of the local ionospheric electron gyro frequency. We use the SEE measurements to obtain transverse length scales of the striations involved in the generation of the SEE. Our results show that different spectral features of the SEE display different temporal dynamics, suggesting that they are related to striations with different transverse length scales (1 less than or similar to L-perpendicular to less than or similar to 25 m).
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Astronomy and astrophysics
- Astronomi och astrofysik
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database